Python os.F_OK() Examples

def _clean_check(cmd, target):
    """
    Run the command to download target. If the command fails, clean up before
    re-raising the error.
    """
    try:
        subprocess.check_call(cmd)
    except subprocess.CalledProcessError:
        if os.access(target, os.F_OK):
            os.unlink(target)
        raise 

def __init__(self, dir, file_template=_default_file_template,
                 truncate_slug_length=40,
                 version_locations=None,
                 sourceless=False, output_encoding="utf-8"):
        self.dir = dir
        self.file_template = file_template
        self.version_locations = version_locations
        self.truncate_slug_length = truncate_slug_length or 40
        self.sourceless = sourceless
        self.output_encoding = output_encoding
        self.revision_map = revision.RevisionMap(self._load_revisions)

        if not os.access(dir, os.F_OK):
            raise util.CommandError("Path doesn't exist: %r.  Please use "
                                    "the 'init' command to create a new "
                                    "scripts folder." % dir) 

def write_script(
        scriptdir, rev_id, content, encoding='ascii', sourceless=False):
    old = scriptdir.revision_map.get_revision(rev_id)
    path = old.path

    content = textwrap.dedent(content)
    if encoding:
        content = content.encode(encoding)
    with open(path, 'wb') as fp:
        fp.write(content)
    pyc_path = util.pyc_file_from_path(path)
    if os.access(pyc_path, os.F_OK):
        os.unlink(pyc_path)
    script = Script._from_path(scriptdir, path)
    old = scriptdir.revision_map.get_revision(script.revision)
    if old.down_revision != script.down_revision:
        raise Exception("Can't change down_revision "
                        "on a refresh operation.")
    scriptdir.revision_map.add_revision(script, _replace=True)

    if sourceless:
        make_sourceless(path) 

def getTasksProcForce(self) :
		""" Get tasks list by bruteforcing /proc """
		
		for i in range(1, 65535, 1) :
			if(os.access("/proc/" + str(i) + "/status", os.F_OK) == True):
				l = self.openProcTaskStatus("/proc/" + str(i) + "/status")
				if(l != []):
					self.tasks_procforce.map_tasks[int(l[0])] = [int(l[1]), int(l[2]), l[3], 0, 0]
					self.tasks_procforce.list_tasks.append(int(l[0]))			
					
					if(os.access("/proc/" + str(i) + "/task", os.F_OK) == True):
						for srep in os.listdir("/proc/" + str(i) + "/task"):
							if(srep != l[0]):
								ll = self.openProcTaskStatus("/proc/" + str(i) + "/task/" + srep + "/status")
								self.tasks_procforce.map_tasks[int(ll[0])] = [int(ll[1]), int(ll[2]), ll[3], 0, 1]
								self.tasks_procforce.list_tasks.append(int(ll[0])) 

def _clone_test_db(self, number, verbosity, keepdb=False):
        source_database_name = self.connection.settings_dict['NAME']
        target_database_name = self.get_test_db_clone_settings(number)['NAME']
        # Forking automatically makes a copy of an in-memory database.
        if not self.connection.is_in_memory_db(source_database_name):
            # Erase the old test database
            if os.access(target_database_name, os.F_OK):
                if keepdb:
                    return
                if verbosity >= 1:
                    print("Destroying old test database for alias %s..." % (
                        self._get_database_display_str(verbosity, target_database_name),
                    ))
                try:
                    os.remove(target_database_name)
                except Exception as e:
                    sys.stderr.write("Got an error deleting the old test database: %s\n" % e)
                    sys.exit(2)
            try:
                shutil.copy(source_database_name, target_database_name)
            except Exception as e:
                sys.stderr.write("Got an error cloning the test database: %s\n" % e)
                sys.exit(2) 

def _popen(command, args):
    import os
    path = os.environ.get("PATH", os.defpath).split(os.pathsep)
    path.extend(('/sbin', '/usr/sbin'))
    for dir in path:
        executable = os.path.join(dir, command)
        if (os.path.exists(executable) and
            os.access(executable, os.F_OK | os.X_OK) and
            not os.path.isdir(executable)):
            break
    else:
        return None
    # LC_ALL to ensure English output, 2>/dev/null to prevent output on
    # stderr (Note: we don't have an example where the words we search for
    # are actually localized, but in theory some system could do so.)
    cmd = 'LC_ALL=C %s %s 2>/dev/null' % (executable, args)
    return os.popen(cmd) 

def mountpoint_choosen(option):
	if option is None:
		return

	from Screens.ChoiceBox import ChoiceBox

	print "scanning", option
	(description, mountpoint, session) = option
	res = scanDevice(mountpoint)

	list = [ (r.description, r, res[r], session) for r in res ]

	if not list:
		from Screens.MessageBox import MessageBox
		if os.access(mountpoint, os.F_OK|os.R_OK):
			session.open(MessageBox, _("No displayable files on this medium found!"), MessageBox.TYPE_INFO, simple = True, timeout = 5)
		else:
			print "ignore", mountpoint, "because its not accessible"
		return

	session.openWithCallback(execute, ChoiceBox,
		title = _("The following files were found..."),
		list = list) 

def on_debug_activate(self):
        dotfile = "/home/pi/dev/bossjones-github/scarlett_os/_debug/generator-player.dot"
        pngfile = "/home/pi/dev/bossjones-github/scarlett_os/_debug/generator-player-pipeline.png"  # NOQA

        parent_dir = get_parent_dir(dotfile)

        mkdir_if_does_not_exist(parent_dir)

        if os.access(dotfile, os.F_OK):
            os.remove(dotfile)
        if os.access(pngfile, os.F_OK):
            os.remove(pngfile)

        if not fname_exists(dotfile):
            touch_empty_file(dotfile)

        if not fname_exists(pngfile):
            touch_empty_file(pngfile)

        Gst.debug_bin_to_dot_file(self.pipeline,
                                  Gst.DebugGraphDetails.ALL, "generator-player")
        os.system('/usr/bin/dot' + " -Tpng -o " + pngfile + " " + dotfile)

    # Gstreamer callbacks. 

def _popen(command, args):
    import os
    path = os.environ.get("PATH", os.defpath).split(os.pathsep)
    path.extend(('/sbin', '/usr/sbin'))
    for dir in path:
        executable = os.path.join(dir, command)
        if (os.path.exists(executable) and
            os.access(executable, os.F_OK | os.X_OK) and
            not os.path.isdir(executable)):
            break
    else:
        return None
    # LC_ALL to ensure English output, 2>/dev/null to prevent output on
    # stderr (Note: we don't have an example where the words we search for
    # are actually localized, but in theory some system could do so.)
    cmd = 'LC_ALL=C %s %s 2>/dev/null' % (executable, args)
    return os.popen(cmd) 

def _popen(command, args):
    import os
    path = os.environ.get("PATH", os.defpath).split(os.pathsep)
    path.extend(('/sbin', '/usr/sbin'))
    for dir in path:
        executable = os.path.join(dir, command)
        if (os.path.exists(executable) and
            os.access(executable, os.F_OK | os.X_OK) and
            not os.path.isdir(executable)):
            break
    else:
        return None
    # LC_ALL to ensure English output, 2>/dev/null to prevent output on
    # stderr (Note: we don't have an example where the words we search for
    # are actually localized, but in theory some system could do so.)
    cmd = 'LC_ALL=C %s %s 2>/dev/null' % (executable, args)
    return os.popen(cmd) 

def set_imageinfo( memoryFilePath ):
	path = r'{}'.format( memoryFilePath )
	path = os.path.abspath( path )
	try:
		if os.access( path, os.F_OK):
			if  os.access( path, os.R_OK ):
				cwd 	  = os.getcwd()
				imageinfo = [ 'vol.py', '-f', '{}'.format( path ), 'imageinfo',	 \
										'--output=text', \
										'--output-file={}'.format( os.path.join( cwd, 'imageinfo.text' ))]
				return imageinfo
			else:
				print '\n[!] Error File Permissions: No Read Access for {}\n'.format( path )
		else:
			print '\n[!] Error FilePath:  Does not exist {}\n'.format( path )

	except Exception as set_imageinfo_error:
		print '[!] EXCEPTION ERROR:  < set_imageinfo > function'
		print set_imageinfo_error 

def _popen(command, args):
    import os
    path = os.environ.get("PATH", os.defpath).split(os.pathsep)
    path.extend(('/sbin', '/usr/sbin'))
    for dir in path:
        executable = os.path.join(dir, command)
        if (os.path.exists(executable) and
            os.access(executable, os.F_OK | os.X_OK) and
            not os.path.isdir(executable)):
            break
    else:
        return None
    # LC_ALL to ensure English output, 2>/dev/null to prevent output on
    # stderr (Note: we don't have an example where the words we search for
    # are actually localized, but in theory some system could do so.)
    cmd = 'LC_ALL=C %s %s 2>/dev/null' % (executable, args)
    return os.popen(cmd) 

def _popen(command, args):
    import os
    path = os.environ.get("PATH", os.defpath).split(os.pathsep)
    path.extend(('/sbin', '/usr/sbin'))
    for dir in path:
        executable = os.path.join(dir, command)
        if (os.path.exists(executable) and
            os.access(executable, os.F_OK | os.X_OK) and
            not os.path.isdir(executable)):
            break
    else:
        return None
    # LC_ALL to ensure English output, 2>/dev/null to prevent output on
    # stderr (Note: we don't have an example where the words we search for
    # are actually localized, but in theory some system could do so.)
    cmd = 'LC_ALL=C %s %s 2>/dev/null' % (executable, args)
    return os.popen(cmd) 

def _popen(command, args):
    import os
    path = os.environ.get("PATH", os.defpath).split(os.pathsep)
    path.extend(('/sbin', '/usr/sbin'))
    for dir in path:
        executable = os.path.join(dir, command)
        if (os.path.exists(executable) and
            os.access(executable, os.F_OK | os.X_OK) and
            not os.path.isdir(executable)):
            break
    else:
        return None
    # LC_ALL to ensure English output, 2>/dev/null to prevent output on
    # stderr (Note: we don't have an example where the words we search for
    # are actually localized, but in theory some system could do so.)
    cmd = 'LC_ALL=C %s %s 2>/dev/null' % (executable, args)
    return os.popen(cmd) 

def _popen(command, args):
    import os
    path = os.environ.get("PATH", os.defpath).split(os.pathsep)
    path.extend(('/sbin', '/usr/sbin'))
    for dir in path:
        executable = os.path.join(dir, command)
        if (os.path.exists(executable) and
            os.access(executable, os.F_OK | os.X_OK) and
            not os.path.isdir(executable)):
            break
    else:
        return None
    # LC_ALL to ensure English output, 2>/dev/null to prevent output on
    # stderr (Note: we don't have an example where the words we search for
    # are actually localized, but in theory some system could do so.)
    cmd = 'LC_ALL=C %s %s 2>/dev/null' % (executable, args)
    return os.popen(cmd) 

def _popen(command, args):
    import os
    path = os.environ.get("PATH", os.defpath).split(os.pathsep)
    path.extend(('/sbin', '/usr/sbin'))
    for dir in path:
        executable = os.path.join(dir, command)
        if (os.path.exists(executable) and
            os.access(executable, os.F_OK | os.X_OK) and
            not os.path.isdir(executable)):
            break
    else:
        return None
    # LC_ALL to ensure English output, 2>/dev/null to prevent output on
    # stderr (Note: we don't have an example where the words we search for
    # are actually localized, but in theory some system could do so.)
    cmd = 'LC_ALL=C %s %s 2>/dev/null' % (executable, args)
    return os.popen(cmd) 

def mountpoint_choosen(option):
	if option is None:
		return

	from Screens.ChoiceBox import ChoiceBox

	print "scanning", option
	(description, mountpoint, session) = option
	res = scanDevice(mountpoint)

	list = [ (r.description, r, res[r], session) for r in res ]

	if not list:
		from Screens.MessageBox import MessageBox
		if os.access(mountpoint, os.F_OK|os.R_OK):
			session.open(MessageBox, _("No displayable files on this medium found!"), MessageBox.TYPE_INFO, simple = True, timeout = 5)
		else:
			print "ignore", mountpoint, "because its not accessible"
		return

	session.openWithCallback(execute, ChoiceBox,
		title = _("The following files were found..."),
		list = list) 

def _set_cwd(self):
        try:
            cwd = os.getcwd()
            if not os.access(cwd, os.F_OK|os.R_OK):
                raise
            return cwd
        except:
            # we don't have access to the cwd, probably because of sudo.
            # Try and move to a neutral location to prevent errors
            for cwd in [os.path.expandvars('$HOME'), tempfile.gettempdir()]:
                try:
                    if os.access(cwd, os.F_OK|os.R_OK):
                        os.chdir(cwd)
                        return cwd
                except:
                    pass
        # we won't error here, as it may *not* be a problem,
        # and we don't want to break modules unnecessarily
        return None 

def wrap_code(self, routine, helpers=[]):

        workdir = self.filepath or tempfile.mkdtemp("_sympy_compile")
        if not os.access(workdir, os.F_OK):
            os.mkdir(workdir)
        oldwork = os.getcwd()
        os.chdir(workdir)
        try:
            sys.path.append(workdir)
            self._generate_code(routine, helpers)
            self._prepare_files(routine)
            self._process_files(routine)
            mod = __import__(self.module_name)
        finally:
            sys.path.remove(workdir)
            CodeWrapper._module_counter += 1
            os.chdir(oldwork)
            if not self.filepath:
                shutil.rmtree(workdir)

        return self._get_wrapped_function(mod) 

def __init__(self, dir, file_template=_default_file_template,
                 truncate_slug_length=40,
                 version_locations=None,
                 sourceless=False, output_encoding="utf-8"):
        self.dir = dir
        self.file_template = file_template
        self.version_locations = version_locations
        self.truncate_slug_length = truncate_slug_length or 40
        self.sourceless = sourceless
        self.output_encoding = output_encoding
        self.revision_map = revision.RevisionMap(self._load_revisions)

        if not os.access(dir, os.F_OK):
            raise util.CommandError("Path doesn't exist: %r.  Please use "
                                    "the 'init' command to create a new "
                                    "scripts folder." % dir) 

def write_script(
        scriptdir, rev_id, content, encoding='ascii', sourceless=False):
    old = scriptdir.revision_map.get_revision(rev_id)
    path = old.path

    content = textwrap.dedent(content)
    if encoding:
        content = content.encode(encoding)
    with open(path, 'wb') as fp:
        fp.write(content)
    pyc_path = util.pyc_file_from_path(path)
    if os.access(pyc_path, os.F_OK):
        os.unlink(pyc_path)
    script = Script._from_path(scriptdir, path)
    old = scriptdir.revision_map.get_revision(script.revision)
    if old.down_revision != script.down_revision:
        raise Exception("Can't change down_revision "
                        "on a refresh operation.")
    scriptdir.revision_map.add_revision(script, _replace=True)

    if sourceless:
        make_sourceless(path) 

def crear_repo(package_name):
	md5hash_pn = md5(package_name).hexdigest()
	first_pref = md5hash_pn[0:2]
	second_pref = md5hash_pn[2:4]
	workingdir = root_git_dir+"/"+first_pref+"/"+second_pref+"/" + package_name
	if not(os.access(root_git_dir+"/"+first_pref, os.F_OK)):
		os.mkdir(root_git_dir+"/"+first_pref)
		os.mkdir(root_git_dir+"/"+first_pref+"/"+second_pref)
	elif not(os.access(root_git_dir+"/"+first_pref+"/"+second_pref, os.F_OK)):
		os.mkdir(root_git_dir+"/"+first_pref+"/"+second_pref)
	repo = pygit2.init_repository(workingdir)
	dashed_package_name=package_name.replace('.','-').lower()
	myRemote = repo.remotes.create(package_name, gitlab_url+'/marvin/'+dashed_package_name+'.git')
	gl = Gitlab (gitlab_url, gitlab_token)
	gl.auth()
	p = gl.Project({'name': package_name, 'public':True})
	p.save()
	return repo 

def __init__(self, dir, file_template=_default_file_template,
                 truncate_slug_length=40,
                 version_locations=None,
                 sourceless=False, output_encoding="utf-8",
                 timezone=None):
        self.dir = dir
        self.file_template = file_template
        self.version_locations = version_locations
        self.truncate_slug_length = truncate_slug_length or 40
        self.sourceless = sourceless
        self.output_encoding = output_encoding
        self.revision_map = revision.RevisionMap(self._load_revisions)
        self.timezone = timezone

        if not os.access(dir, os.F_OK):
            raise util.CommandError("Path doesn't exist: %r.  Please use "
                                    "the 'init' command to create a new "
                                    "scripts folder." % dir) 

def write_script(
        scriptdir, rev_id, content, encoding='ascii', sourceless=False):
    old = scriptdir.revision_map.get_revision(rev_id)
    path = old.path

    content = textwrap.dedent(content)
    if encoding:
        content = content.encode(encoding)
    with open(path, 'wb') as fp:
        fp.write(content)
    pyc_path = util.pyc_file_from_path(path)
    if os.access(pyc_path, os.F_OK):
        os.unlink(pyc_path)
    script = Script._from_path(scriptdir, path)
    old = scriptdir.revision_map.get_revision(script.revision)
    if old.down_revision != script.down_revision:
        raise Exception("Can't change down_revision "
                        "on a refresh operation.")
    scriptdir.revision_map.add_revision(script, _replace=True)

    if sourceless:
        make_sourceless(path) 

def setTmpDir(self):
        """Set the tmpDir attribute to a reasonnable location for a temporary
        directory"""
        if os.name != 'nt':
            # On unix use /tmp by default
            self.tmpDir = os.environ.get("TMPDIR", "/tmp")
            self.tmpDir = os.environ.get("TMP", self.tmpDir)
        else:
            # On Windows use the current directory
            self.tmpDir = os.environ.get("TMPDIR", "")
            self.tmpDir = os.environ.get("TMP", self.tmpDir)
            self.tmpDir = os.environ.get("TEMP", self.tmpDir)
        if not os.path.isdir(self.tmpDir):
            self.tmpDir = ""
        elif not os.access(self.tmpDir, os.F_OK + os.W_OK):
            self.tmpDir = "" 

def do_cleanup(self):
        """cleanup temporary files"""

        super(ModelIterationSample, self).do_cleanup()

        if self.temp:
            for i in (
                self.transform,
                self.inv_transform,
                self.corr_transform,
                self.corr_mri,
                self.diff_bias,
                self.corr_bias,
                self.transform_grid,
                self.inv_transform_grid,
                self.corr_transform_grid0,
                self.corr_transform_grid1,
                ):
                if os.access(i, os.F_OK):
                    os.unlink(i) 

def _create_test_db(self, verbosity, autoclobber, keepdb=False):
        test_database_name = self._get_test_db_name()

        if keepdb:
            return test_database_name
        if not self.connection.is_in_memory_db(test_database_name):
            # Erase the old test database
            if verbosity >= 1:
                print("Destroying old test database '%s'..." % self.connection.alias)
            if os.access(test_database_name, os.F_OK):
                if not autoclobber:
                    confirm = input(
                        "Type 'yes' if you would like to try deleting the test "
                        "database '%s', or 'no' to cancel: " % test_database_name
                    )
                if autoclobber or confirm == 'yes':
                    try:
                        os.remove(test_database_name)
                    except Exception as e:
                        sys.stderr.write("Got an error deleting the old test database: %s\n" % e)
                        sys.exit(2)
                else:
                    print("Tests cancelled.")
                    sys.exit(1)
        return test_database_name 

def __init__(self, dir, file_template=_default_file_template,
                 truncate_slug_length=40,
                 version_locations=None,
                 sourceless=False, output_encoding="utf-8"):
        self.dir = dir
        self.file_template = file_template
        self.version_locations = version_locations
        self.truncate_slug_length = truncate_slug_length or 40
        self.sourceless = sourceless
        self.output_encoding = output_encoding
        self.revision_map = revision.RevisionMap(self._load_revisions)

        if not os.access(dir, os.F_OK):
            raise util.CommandError("Path doesn't exist: %r.  Please use "
                                    "the 'init' command to create a new "
                                    "scripts folder." % dir) 

def write_script(
        scriptdir, rev_id, content, encoding='ascii', sourceless=False):
    old = scriptdir.revision_map.get_revision(rev_id)
    path = old.path

    content = textwrap.dedent(content)
    if encoding:
        content = content.encode(encoding)
    with open(path, 'wb') as fp:
        fp.write(content)
    pyc_path = util.pyc_file_from_path(path)
    if os.access(pyc_path, os.F_OK):
        os.unlink(pyc_path)
    script = Script._from_path(scriptdir, path)
    old = scriptdir.revision_map.get_revision(script.revision)
    if old.down_revision != script.down_revision:
        raise Exception("Can't change down_revision "
                        "on a refresh operation.")
    scriptdir.revision_map.add_revision(script, _replace=True)

    if sourceless:
        make_sourceless(path) 

def _popen(command, args):
    import os
    path = os.environ.get("PATH", os.defpath).split(os.pathsep)
    path.extend(('/sbin', '/usr/sbin'))
    for dir in path:
        executable = os.path.join(dir, command)
        if (os.path.exists(executable) and
            os.access(executable, os.F_OK | os.X_OK) and
            not os.path.isdir(executable)):
            break
    else:
        return None
    # LC_ALL to ensure English output, 2>/dev/null to prevent output on
    # stderr (Note: we don't have an example where the words we search for
    # are actually localized, but in theory some system could do so.)
    cmd = 'LC_ALL=C %s %s 2>/dev/null' % (executable, args)
    return os.popen(cmd) 

def _popen(command, args):
    import os
    path = os.environ.get("PATH", os.defpath).split(os.pathsep)
    path.extend(('/sbin', '/usr/sbin'))
    for dir in path:
        executable = os.path.join(dir, command)
        if (os.path.exists(executable) and
            os.access(executable, os.F_OK | os.X_OK) and
            not os.path.isdir(executable)):
            break
    else:
        return None
    # LC_ALL to ensure English output, 2>/dev/null to prevent output on
    # stderr (Note: we don't have an example where the words we search for
    # are actually localized, but in theory some system could do so.)
    cmd = 'LC_ALL=C %s %s 2>/dev/null' % (executable, args)
    return os.popen(cmd) 

def _popen(command, args):
    import os
    path = os.environ.get("PATH", os.defpath).split(os.pathsep)
    path.extend(('/sbin', '/usr/sbin'))
    for dir in path:
        executable = os.path.join(dir, command)
        if (os.path.exists(executable) and
            os.access(executable, os.F_OK | os.X_OK) and
            not os.path.isdir(executable)):
            break
    else:
        return None
    # LC_ALL to ensure English output, 2>/dev/null to prevent output on
    # stderr (Note: we don't have an example where the words we search for
    # are actually localized, but in theory some system could do so.)
    cmd = 'LC_ALL=C %s %s 2>/dev/null' % (executable, args)
    return os.popen(cmd) 

def execute(self):
        from ranger.container.file import File
        from os import access

        new_name = self.rest(1)

        if not new_name:
            return self.fm.notify('Syntax: rename <newname>', bad=True)

        if new_name == self.fm.thisfile.basename:
            return

        if access(new_name, os.F_OK):
            return self.fm.notify("Can't rename: file already exists!", bad=True)

        self.fm.rename(self.fm.thisfile, new_name)
        f = File(new_name)
        self.fm.thisdir.pointed_obj = f
        self.fm.thisfile = f 

def _create_test_db(self, verbosity, autoclobber, keepdb=False):
        test_database_name = self._get_test_db_name()

        if keepdb:
            return test_database_name
        if not self.connection.is_in_memory_db(test_database_name):
            # Erase the old test database
            if verbosity >= 1:
                print("Destroying old test database '%s'..." % self.connection.alias)
            if os.access(test_database_name, os.F_OK):
                if not autoclobber:
                    confirm = input(
                        "Type 'yes' if you would like to try deleting the test "
                        "database '%s', or 'no' to cancel: " % test_database_name
                    )
                if autoclobber or confirm == 'yes':
                    try:
                        os.remove(test_database_name)
                    except Exception as e:
                        sys.stderr.write("Got an error deleting the old test database: %s\n" % e)
                        sys.exit(2)
                else:
                    print("Tests cancelled.")
                    sys.exit(1)
        return test_database_name 

def __init__(self, dir, file_template=_default_file_template,
                 truncate_slug_length=40,
                 version_locations=None,
                 sourceless=False, output_encoding="utf-8"):
        self.dir = dir
        self.file_template = file_template
        self.version_locations = version_locations
        self.truncate_slug_length = truncate_slug_length or 40
        self.sourceless = sourceless
        self.output_encoding = output_encoding
        self.revision_map = revision.RevisionMap(self._load_revisions)

        if not os.access(dir, os.F_OK):
            raise util.CommandError("Path doesn't exist: %r.  Please use "
                                    "the 'init' command to create a new "
                                    "scripts folder." % dir) 

def write_script(
        scriptdir, rev_id, content, encoding='ascii', sourceless=False):
    old = scriptdir.revision_map.get_revision(rev_id)
    path = old.path

    content = textwrap.dedent(content)
    if encoding:
        content = content.encode(encoding)
    with open(path, 'wb') as fp:
        fp.write(content)
    pyc_path = util.pyc_file_from_path(path)
    if os.access(pyc_path, os.F_OK):
        os.unlink(pyc_path)
    script = Script._from_path(scriptdir, path)
    old = scriptdir.revision_map.get_revision(script.revision)
    if old.down_revision != script.down_revision:
        raise Exception("Can't change down_revision "
                        "on a refresh operation.")
    scriptdir.revision_map.add_revision(script, _replace=True)

    if sourceless:
        make_sourceless(path) 

def _clone_test_db(self, number, verbosity, keepdb=False):
        source_database_name = self.connection.settings_dict['NAME']
        target_database_name = self.get_test_db_clone_settings(number)['NAME']
        # Forking automatically makes a copy of an in-memory database.
        if not self.is_in_memory_db(source_database_name):
            # Erase the old test database
            if os.access(target_database_name, os.F_OK):
                if keepdb:
                    return
                if verbosity >= 1:
                    print("Destroying old test database for alias %s..." % (
                        self._get_database_display_str(verbosity, target_database_name),
                    ))
                try:
                    os.remove(target_database_name)
                except Exception as e:
                    sys.stderr.write("Got an error deleting the old test database: %s\n" % e)
                    sys.exit(2)
            try:
                shutil.copy(source_database_name, target_database_name)
            except Exception as e:
                sys.stderr.write("Got an error cloning the test database: %s\n" % e)
                sys.exit(2) 

def test_sftp_session(server):
    for uid in server.users:
        target_dir = tempfile.mkdtemp()
        target_fname = os.path.join(target_dir, "foo")
        assert not os.access(target_fname, os.F_OK)

        with server.client(uid) as c:
            sftp = c.open_sftp()
            sftp.put(__file__, target_fname, confirm=True)
            assert files_equal(target_fname, __file__)

            second_copy = os.path.join(target_dir, "bar")
            assert not os.access(second_copy, os.F_OK)
            sftp.get(target_fname, second_copy)
            assert files_equal(target_fname, second_copy)

            dir_contents = sftp.listdir(target_dir)
            assert len(dir_contents) == 2
            assert "foo" in dir_contents
            assert "bar" in dir_contents
            with raises(IOError):
                sftp.listdir("/123_no_dir") 

def _search_for_model(names, workdir):
    """
    Check if a model file is available.

    :param names: list of model names to be searcher for, highest ranking
                  first
    :type names: str
    :param workdir: the workdir where the model file is located
    :type name: str
    :type workdir: str

    :returns: the path to the model file or None if model file not found
    """

    for name in names:
        path = os.path.join(workdir, name)

        if os.access(path, os.F_OK):
            return path

    return None 

def mountpoint_choosen(option):
	if option is None:
		return

	from Screens.ChoiceBox import ChoiceBox

	print "scanning", option
	(description, mountpoint, session) = option
	res = scanDevice(mountpoint)

	list = [ (r.description, r, res[r], session) for r in res ]

	if not list:
		from Screens.MessageBox import MessageBox
		if os.access(mountpoint, os.F_OK|os.R_OK):
			session.open(MessageBox, _("No displayable files on this medium found!"), MessageBox.TYPE_INFO, simple = True, timeout = 5)
		else:
			print "ignore", mountpoint, "because its not accessible"
		return

	session.openWithCallback(execute, ChoiceBox,
		title = _("The following files were found..."),
		list = list) 

def _clean_check(cmd, target):
    """
    Run the command to download target. If the command fails, clean up before
    re-raising the error.
    """
    try:
        subprocess.check_call(cmd)
    except subprocess.CalledProcessError:
        if os.access(target, os.F_OK):
            os.unlink(target)
        raise 

def _clean_check(cmd, target):
    """
    Run the command to download target. If the command fails, clean up before
    re-raising the error.
    """
    try:
        subprocess.check_call(cmd)
    except subprocess.CalledProcessError:
        if os.access(target, os.F_OK):
            os.unlink(target)
        raise 

def _clean_check(cmd, target):
    """
    Run the command to download target.

    If the command fails, clean up before re-raising the error.
    """
    try:
        subprocess.check_call(cmd)
    except subprocess.CalledProcessError:
        if os.access(target, os.F_OK):
            os.unlink(target)
        raise 

def _clean_check(cmd, target):
    """
    Run the command to download target. If the command fails, clean up before
    re-raising the error.
    """
    try:
        subprocess.check_call(cmd)
    except subprocess.CalledProcessError:
        if os.access(target, os.F_OK):
            os.unlink(target)
        raise 

def _clean_check(cmd, target):
    """
    Run the command to download target. If the command fails, clean up before
    re-raising the error.
    """
    try:
        subprocess.check_call(cmd)
    except subprocess.CalledProcessError:
        if os.access(target, os.F_OK):
            os.unlink(target)
        raise 

def _clean_check(cmd, target):
    """
    Run the command to download target. If the command fails, clean up before
    re-raising the error.
    """
    try:
        subprocess.check_call(cmd)
    except subprocess.CalledProcessError:
        if os.access(target, os.F_OK):
            os.unlink(target)
        raise 

def test_generateScriptEnv(self):
        filename = "/tmp/test.sh"

        testFile = "/tmp/test.txt"

        cmds = """
X="${ENV_TEST}"

touch "${X}"

exit 0
"""

        generateScript(filename, cmds, {"ENV_TEST": testFile})

        # check permissions
        self.assertTrue(os.access(filename, os.F_OK))
        self.assertTrue(os.access(filename, os.X_OK | os.R_OK))

        # execute the script and expect it to create the file
        status = subprocess.call([filename])
        self.assertEqual(status, 0)

        # check that the testFile got created by the script
        self.assertTrue(os.access(testFile, os.F_OK))

        # cleanup
        os.remove(filename)
        os.remove(testFile) 

def execute(self):
        from ranger.container.file import File
        from os import access

        new_name = self.rest(1)

        tagged = {}
        old_name = self.fm.thisfile.relative_path
        for f in self.fm.tags.tags:
            if str(f).startswith(self.fm.thisfile.path):
                tagged[f] = self.fm.tags.tags[f]
                self.fm.tags.remove(f)

        if not new_name:
            return self.fm.notify('Syntax: rename <newname>', bad=True)

        if new_name == old_name:
            return

        if access(new_name, os.F_OK):
            return self.fm.notify("Can't rename: file already exists!", bad=True)

        if self.fm.rename(self.fm.thisfile, new_name):
            f = File(new_name)
            # Update bookmarks that were pointing on the previous name
            obsoletebookmarks = [b for b in self.fm.bookmarks
                                 if b[1].path == self.fm.thisfile]
            if obsoletebookmarks:
                for key, _ in obsoletebookmarks:
                    self.fm.bookmarks[key] = f
                self.fm.bookmarks.update_if_outdated()

            self.fm.thisdir.pointed_obj = f
            self.fm.thisfile = f
            for t in tagged:
                self.fm.tags.tags[t.replace(old_name, new_name)] = tagged[t]
                self.fm.tags.dump() 

def _select_config_file_path():
    """
    Return an openATTIC configuration pathname
    """
    possible_paths = ("/etc/default/openattic", "/etc/sysconfig/openattic")
    for path in possible_paths:
        if os.access(path, os.F_OK) and os.access(path, os.R_OK | os.W_OK):
            return path
    raise CommandExecutionError(
        ("No openATTIC config file found in the following locations: "
         "{}".format(possible_paths))) 

def init(config, directory, template='generic'):
    """Initialize a new scripts directory."""

    if os.access(directory, os.F_OK):
        raise util.CommandError("Directory %s already exists" % directory)

    template_dir = os.path.join(config.get_template_directory(),
                                template)
    if not os.access(template_dir, os.F_OK):
        raise util.CommandError("No such template %r" % template)

    util.status("Creating directory %s" % os.path.abspath(directory),
                os.makedirs, directory)

    versions = os.path.join(directory, 'versions')
    util.status("Creating directory %s" % os.path.abspath(versions),
                os.makedirs, versions)

    script = ScriptDirectory(directory)

    for file_ in os.listdir(template_dir):
        file_path = os.path.join(template_dir, file_)
        if file_ == 'alembic.ini.mako':
            config_file = os.path.abspath(config.config_file_name)
            if os.access(config_file, os.F_OK):
                util.msg("File %s already exists, skipping" % config_file)
            else:
                script._generate_template(
                    file_path,
                    config_file,
                    script_location=directory
                )
        elif os.path.isfile(file_path):
            output_file = os.path.join(directory, file_)
            script._copy_file(
                file_path,
                output_file
            )

    util.msg("Please edit configuration/connection/logging "
             "settings in %r before proceeding." % config_file)