Python __builtin__.open() Examples

def test_write(self):
    expected_dict = {
        'project_id': 'test_project',
        'client_id': 'test_client_id',
        'client_secret': 'test_client_secret',
        'bucket': 'test_project.appspot.com',
    }
    self.fs.CreateFile('/this/config/file.yaml', contents=_EMPTY_CONFIG)
    test_config = common.ProjectConfig(
        'asdf', 'test_project', 'test_client_id', 'test_client_secret', None,
        '/this/config/file.yaml',
    )
    test_config.write()
    with open('/this/config/file.yaml') as config_file:
      config = yaml.safe_load(config_file)
    self.assertEqual(config['asdf'], expected_dict) 

def setUp(self):
    super(AuthTest, self).setUp()
    self._test_project = 'test_project'
    self._test_client_id = 'test_client_id'
    self._test_client_secret = 'test_client_secret'
    self._test_config = common.ProjectConfig(
        'test_key', self._test_project, self._test_client_id,
        self._test_client_secret, None, '/test/path.yaml')
    # Save the real modules for clean up.
    self.real_open = builtins.open
    # Create a fake file system and stub out builtin modules.
    self.fs = fake_filesystem.FakeFilesystem()
    self.os = fake_filesystem.FakeOsModule(self.fs)
    self.open = fake_filesystem.FakeFileOpen(self.fs)
    self.stubs = mox3_stubout.StubOutForTesting()
    self.stubs.SmartSet(builtins, 'open', self.open)
    self.stubs.SmartSet(auth, 'os', self.os) 

def GetVersionObject(isfile=os.path.isfile, open_fn=open):
  """Gets the version of the SDK by parsing the VERSION file.

  Args:
    isfile: used for testing.
    open_fn: Used for testing.

  Returns:
    A Yaml object or None if the VERSION file does not exist.
  """
  version_filename = os.path.join(os.path.dirname(google.appengine.__file__),
                                  VERSION_FILE)
  if not isfile(version_filename):
    logging.error('Could not find version file at %s', version_filename)
    return None

  version_fh = open_fn(version_filename, 'r')
  try:
    version = yaml.safe_load(version_fh)
  finally:
    version_fh.close()

  return version 

def __init__(self, stream, errors='strict'):

        """ Creates a StreamWriter instance.

            stream must be a file-like object open for writing
            (binary) data.

            The StreamWriter may use different error handling
            schemes by providing the errors keyword argument. These
            parameters are predefined:

             'strict' - raise a ValueError (or a subclass)
             'ignore' - ignore the character and continue with the next
             'replace'- replace with a suitable replacement character
             'xmlcharrefreplace' - Replace with the appropriate XML
                                   character reference.
             'backslashreplace'  - Replace with backslashed escape
                                   sequences (only for encoding).

            The set of allowed parameter values can be extended via
            register_error.
        """
        self.stream = stream
        self.errors = errors 

def __init__(self, stream, errors='strict'):

        """ Creates a StreamReader instance.

            stream must be a file-like object open for reading
            (binary) data.

            The StreamReader may use different error handling
            schemes by providing the errors keyword argument. These
            parameters are predefined:

             'strict' - raise a ValueError (or a subclass)
             'ignore' - ignore the character and continue with the next
             'replace'- replace with a suitable replacement character;

            The set of allowed parameter values can be extended via
            register_error.
        """
        self.stream = stream
        self.errors = errors
        self.bytebuffer = ""
        # For str->str decoding this will stay a str
        # For str->unicode decoding the first read will promote it to unicode
        self.charbuffer = ""
        self.linebuffer = None 

def __init__(self, stream, errors='strict'):

        """ Creates a StreamWriter instance.

            stream must be a file-like object open for writing
            (binary) data.

            The StreamWriter may use different error handling
            schemes by providing the errors keyword argument. These
            parameters are predefined:

             'strict' - raise a ValueError (or a subclass)
             'ignore' - ignore the character and continue with the next
             'replace'- replace with a suitable replacement character
             'xmlcharrefreplace' - Replace with the appropriate XML
                                   character reference.
             'backslashreplace'  - Replace with backslashed escape
                                   sequences (only for encoding).

            The set of allowed parameter values can be extended via
            register_error.
        """
        self.stream = stream
        self.errors = errors 

def get_source(self, fullname):
    """Returns the source for the module specified by fullname.

    This implements part of the extensions to the PEP 302 importer protocol.

    Args:
      fullname: The fullname of the module.

    Returns:
      The source for the module.
    """
    full_path, _, _, loader = self._get_module_info(fullname)
    if loader:
      return loader.get_source(fullname)
    if full_path is None:
      return None
    source_file = open(full_path)
    try:
      return source_file.read()
    finally:
      source_file.close() 

def _check(self, mode=None):
        """Check if TarFile is still open, and if the operation's mode
           corresponds to TarFile's mode.
        """
        if self.closed:
            raise IOError("%s is closed" % self.__class__.__name__)
        if mode is not None and self.mode not in mode:
            raise IOError("bad operation for mode %r" % self.mode) 

def open(file, flag=None, mode=0666):
    """Open the database file, filename, and return corresponding object.

    The flag argument, used to control how the database is opened in the
    other DBM implementations, is ignored in the dumbdbm module; the
    database is always opened for update, and will be created if it does
    not exist.

    The optional mode argument is the UNIX mode of the file, used only when
    the database has to be created.  It defaults to octal code 0666 (and
    will be modified by the prevailing umask).

    """
    # flag argument is currently ignored

    # Modify mode depending on the umask
    try:
        um = _os.umask(0)
        _os.umask(um)
    except AttributeError:
        pass
    else:
        # Turn off any bits that are set in the umask
        mode = mode & (~um)

    return _Database(file, mode) 

def is_tarfile(name):
    """Return True if name points to a tar archive that we
       are able to handle, else return False.
    """
    try:
        t = open(name)
        t.close()
        return True
    except TarError:
        return False 

def __init__(self, name, mode):
        mode = {
            "r": os.O_RDONLY,
            "w": os.O_WRONLY | os.O_CREAT | os.O_TRUNC,
        }[mode]
        if hasattr(os, "O_BINARY"):
            mode |= os.O_BINARY
        self.fd = os.open(name, mode, 0o666) 

def bz2open(cls, name, mode="r", fileobj=None, compresslevel=9, **kwargs):
        """Open bzip2 compressed tar archive name for reading or writing.
           Appending is not allowed.
        """
        if len(mode) > 1 or mode not in "rw":
            raise ValueError("mode must be 'r' or 'w'.")

        try:
            import bz2
        except ImportError:
            raise CompressionError("bz2 module is not available")

        if fileobj is not None:
            fileobj = _BZ2Proxy(fileobj, mode)
        else:
            fileobj = bz2.BZ2File(name, mode, compresslevel=compresslevel)

        try:
            t = cls.taropen(name, mode, fileobj, **kwargs)
        except (IOError, EOFError):
            fileobj.close()
            raise ReadError("not a bzip2 file")
        t._extfileobj = False
        return t

    # All *open() methods are registered here. 

def __init__(self, f):
        self._i_opened_the_file = None
        if isinstance(f, basestring):
            f = __builtin__.open(f, 'wb')
            self._i_opened_the_file = f
        try:
            self.initfp(f)
        except:
            if self._i_opened_the_file:
                f.close()
            raise 

def __init__(self, name, mode):
        mode = {
            "r": os.O_RDONLY,
            "w": os.O_WRONLY | os.O_CREAT | os.O_TRUNC,
        }[mode]
        if hasattr(os, "O_BINARY"):
            mode |= os.O_BINARY
        self.fd = os.open(name, mode, 0o666) 

def _check(self, mode=None):
        """Check if TarFile is still open, and if the operation's mode
           corresponds to TarFile's mode.
        """
        if self.closed:
            raise IOError("%s is closed" % self.__class__.__name__)
        if mode is not None and self.mode not in mode:
            raise IOError("bad operation for mode %r" % self.mode) 

def is_tarfile(name):
    """Return True if name points to a tar archive that we
       are able to handle, else return False.
    """
    try:
        t = open(name)
        t.close()
        return True
    except TarError:
        return False 

def __init__(self, f):
        self._i_opened_the_file = None
        if isinstance(f, basestring):
            f = __builtin__.open(f, 'rb')
            self._i_opened_the_file = f
        # else, assume it is an open file object already
        try:
            self.initfp(f)
        except:
            if self._i_opened_the_file:
                f.close()
            raise 

def __init__(self, f):
        if type(f) == type(''):
            import __builtin__
            f = __builtin__.open(f, 'rb')
        self.initfp(f) 

def __init__(self, name, mode):
        mode = {
            "r": os.O_RDONLY,
            "w": os.O_WRONLY | os.O_CREAT | os.O_TRUNC,
        }[mode]
        if hasattr(os, "O_BINARY"):
            mode |= os.O_BINARY
        self.fd = os.open(name, mode, 0o666) 

def bz2open(cls, name, mode="r", fileobj=None, compresslevel=9, **kwargs):
        """Open bzip2 compressed tar archive name for reading or writing.
           Appending is not allowed.
        """
        if len(mode) > 1 or mode not in "rw":
            raise ValueError("mode must be 'r' or 'w'.")

        try:
            import bz2
        except ImportError:
            raise CompressionError("bz2 module is not available")

        if fileobj is not None:
            fileobj = _BZ2Proxy(fileobj, mode)
        else:
            fileobj = bz2.BZ2File(name, mode, compresslevel=compresslevel)

        try:
            t = cls.taropen(name, mode, fileobj, **kwargs)
        except (IOError, EOFError):
            fileobj.close()
            raise ReadError("not a bzip2 file")
        t._extfileobj = False
        return t

    # All *open() methods are registered here. 

def __init__(self, name, mode):
        mode = {
            "r": os.O_RDONLY,
            "w": os.O_WRONLY | os.O_CREAT | os.O_TRUNC,
        }[mode]
        if hasattr(os, "O_BINARY"):
            mode |= os.O_BINARY
        self.fd = os.open(name, mode, 0o666) 

def __getattr__(self, name,
                    getattr=getattr):

        """ Inherit all other methods from the underlying stream.
        """
        return getattr(self.stream, name)

    # these are needed to make "with codecs.open(...)" work properly 

def _test():
    # Act like gzip; with -d, act like gunzip.
    # The input file is not deleted, however, nor are any other gzip
    # options or features supported.
    args = sys.argv[1:]
    decompress = args and args[0] == "-d"
    if decompress:
        args = args[1:]
    if not args:
        args = ["-"]
    for arg in args:
        if decompress:
            if arg == "-":
                f = GzipFile(filename="", mode="rb", fileobj=sys.stdin)
                g = sys.stdout
            else:
                if arg[-3:] != ".gz":
                    print "filename doesn't end in .gz:", repr(arg)
                    continue
                f = open(arg, "rb")
                g = __builtin__.open(arg[:-3], "wb")
        else:
            if arg == "-":
                f = sys.stdin
                g = GzipFile(filename="", mode="wb", fileobj=sys.stdout)
            else:
                f = __builtin__.open(arg, "rb")
                g = open(arg + ".gz", "wb")
        while True:
            chunk = f.read(1024)
            if not chunk:
                break
            g.write(chunk)
        if g is not sys.stdout:
            g.close()
        if f is not sys.stdin:
            f.close() 

def open(filename, mode="rb", compresslevel=9):
    """Shorthand for GzipFile(filename, mode, compresslevel).

    The filename argument is required; mode defaults to 'rb'
    and compresslevel defaults to 9.

    """
    return GzipFile(filename, mode, compresslevel) 

def open(f, mode=None):
    if mode is None:
        if hasattr(f, 'mode'):
            mode = f.mode
        else:
            mode = 'rb'
    if mode in ('r', 'rb'):
        return Aifc_read(f)
    elif mode in ('w', 'wb'):
        return Aifc_write(f)
    else:
        raise Error, "mode must be 'r', 'rb', 'w', or 'wb'" 

def __init__(self, f):
        if isinstance(f, basestring):
            filename = f
            f = __builtin__.open(f, 'wb')
        else:
            # else, assume it is an open file object already
            filename = '???'
        self.initfp(f)
        if filename[-5:] == '.aiff':
            self._aifc = 0
        else:
            self._aifc = 1 

def open(name, mode='r', bufsize=-1):
    """Public routine to open a file as a posixfile object."""
    return _posixfile_().open(name, mode, bufsize) 

def open(self, name, mode='r', bufsize=-1):
        import __builtin__
        return self.fileopen(__builtin__.open(name, mode, bufsize)) 

def open(file, flag=None, mode=0666):
    """Open the database file, filename, and return corresponding object.

    The flag argument, used to control how the database is opened in the
    other DBM implementations, is ignored in the dumbdbm module; the
    database is always opened for update, and will be created if it does
    not exist.

    The optional mode argument is the UNIX mode of the file, used only when
    the database has to be created.  It defaults to octal code 0666 (and
    will be modified by the prevailing umask).

    """
    # flag argument is currently ignored

    # Modify mode depending on the umask
    try:
        um = _os.umask(0)
        _os.umask(um)
    except AttributeError:
        pass
    else:
        # Turn off any bits that are set in the umask
        mode = mode & (~um)

    return _Database(file, mode, flag) 

def makefile(self, tarinfo, targetpath):
        """Make a file called targetpath.
        """
        source = self.extractfile(tarinfo)
        try:
            with bltn_open(targetpath, "wb") as target:
                copyfileobj(source, target)
        finally:
            source.close()