Python sys.executable() Examples

def test_path_decode(self):
        with tempfile.TemporaryDirectory() as td:
            bad_utf_path = Path(td) / _BAD_UTF
            self.assertTrue(bad_utf_path.endswith(b'/' + _BAD_UTF))
            with open(bad_utf_path, 'w'):
                pass
            res = subprocess.run([
                sys.executable, '-c', f'import os;print(os.listdir({repr(td)}))'
            ], stdout=subprocess.PIPE)
            # Path's handling of invalid UTF-8 matches the default for
            # Python3 when it gets such data from the filesystem.
            self.assertEqual(
                # Both evaluate to surrogate-escaped ['\udcc3('] plus a newline.
                repr([bad_utf_path.basename().decode()]) + '\n',
                res.stdout.decode(),
            ) 

def build(ctx):
    """Build the CLI and GUI executables."""
    ctx.invoke(clean)
    _set_cwd()
    print("------------------------")
    print("Building CLI executable:")
    print("------------------------")
    rtn_code = _run_cli_cmd(["pyinstaller", "package/pyinstaller-cli.spec"])
    if rtn_code != 0:
        sys.exit(rtn_code)
    print("------------------------")
    print("Building GUI executable:")
    print("------------------------")
    rtn_code = _run_cli_cmd(["pyinstaller", "package/pyinstaller-gui.spec"])
    if rtn_code != 0:
        sys.exit(rtn_code)
    return 0 

def modify():
    pythonpath = os.path.dirname(os.path.normpath(sys.executable))
    scripts = os.path.join(pythonpath, "Scripts")
    appdata = os.environ["APPDATA"]
    if hasattr(site, "USER_SITE"):
        userpath = site.USER_SITE.replace(appdata, "%APPDATA%")
        userscripts = os.path.join(userpath, "Scripts")
    else:
        userscripts = None

    with _winreg.CreateKey(HKCU, ENV) as key:
        try:
            envpath = _winreg.QueryValueEx(key, PATH)[0]
        except WindowsError:
            envpath = DEFAULT

        paths = [envpath]
        for path in (pythonpath, scripts, userscripts):
            if path and path not in envpath and os.path.isdir(path):
                paths.append(path)

        envpath = os.pathsep.join(paths)
        _winreg.SetValueEx(key, PATH, 0, _winreg.REG_EXPAND_SZ, envpath)
        return paths, envpath 

def _init_nt():
    """Initialize the module as appropriate for NT"""
    g = {}
    # set basic install directories
    g['LIBDEST'] = get_python_lib(plat_specific=0, standard_lib=1)
    g['BINLIBDEST'] = get_python_lib(plat_specific=1, standard_lib=1)

    # XXX hmmm.. a normal install puts include files here
    g['INCLUDEPY'] = get_python_inc(plat_specific=0)

    g['SO'] = '.pyd'
    g['EXE'] = ".exe"
    g['VERSION'] = get_python_version().replace(".", "")
    g['BINDIR'] = os.path.dirname(os.path.abspath(sys.executable))

    global _config_vars
    _config_vars = g 

def test_join_nondaemon_on_shutdown(self):
        # Issue 1722344
        # Raising SystemExit skipped threading._shutdown
        p = subprocess.Popen([sys.executable, "-c", """if 1:
                import threading
                from time import sleep

                def child():
                    sleep(1)
                    # As a non-daemon thread we SHOULD wake up and nothing
                    # should be torn down yet
                    print "Woke up, sleep function is:", sleep

                threading.Thread(target=child).start()
                raise SystemExit
            """],
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE)
        self.addCleanup(p.stdout.close)
        self.addCleanup(p.stderr.close)
        stdout, stderr = p.communicate()
        self.assertEqual(stdout.strip(),
            "Woke up, sleep function is: <built-in function sleep>")
        stderr = re.sub(r"^\[\d+ refs\]", "", stderr, re.MULTILINE).strip()
        self.assertEqual(stderr, "") 

def _run_and_join(self, script):
        script = """if 1:
            import sys, os, time, threading

            # a thread, which waits for the main program to terminate
            def joiningfunc(mainthread):
                mainthread.join()
                print 'end of thread'
        \n""" + script

        p = subprocess.Popen([sys.executable, "-c", script], stdout=subprocess.PIPE)
        rc = p.wait()
        data = p.stdout.read().replace('\r', '')
        p.stdout.close()
        self.assertEqual(data, "end of main\nend of thread\n")
        self.assertFalse(rc == 2, "interpreter was blocked")
        self.assertTrue(rc == 0, "Unexpected error") 

def _assert_python(expected_success, *args, **env_vars):
    cmd_line = [sys.executable]
    if not env_vars:
        cmd_line.append('-E')
    cmd_line.extend(args)
    # Need to preserve the original environment, for in-place testing of
    # shared library builds.
    env = os.environ.copy()
    env.update(env_vars)
    p = subprocess.Popen(cmd_line, stdin=subprocess.PIPE,
                         stdout=subprocess.PIPE, stderr=subprocess.PIPE,
                         env=env)
    try:
        out, err = p.communicate()
    finally:
        subprocess._cleanup()
        p.stdout.close()
        p.stderr.close()
    rc = p.returncode
    err =  strip_python_stderr(err)
    if (rc and expected_success) or (not rc and not expected_success):
        raise AssertionError(
            "Process return code is %d, "
            "stderr follows:\n%s" % (rc, err.decode('ascii', 'ignore')))
    return rc, out, err 

def test_failed_import_during_compiling(self):
        # Issue 4367
        # Decoding \N escapes requires the unicodedata module. If it can't be
        # imported, we shouldn't segfault.

        # This program should raise a SyntaxError in the eval.
        code = "import sys;" \
            "sys.modules['unicodedata'] = None;" \
            """eval("u'\N{SOFT HYPHEN}'")"""
        args = [sys.executable, "-c", code]
        # We use a subprocess because the unicodedata module may already have
        # been loaded in this process.
        popen = subprocess.Popen(args, stderr=subprocess.PIPE)
        popen.wait()
        self.assertEqual(popen.returncode, 1)
        error = "SyntaxError: (unicode error) \N escapes not supported " \
            "(can't load unicodedata module)"
        self.assertIn(error, popen.stderr.read()) 

def test_ioencoding(self):
        import subprocess
        env = dict(os.environ)

        # Test character: cent sign, encoded as 0x4A (ASCII J) in CP424,
        # not representable in ASCII.

        env["PYTHONIOENCODING"] = "cp424"
        p = subprocess.Popen([sys.executable, "-c", 'print unichr(0xa2)'],
                             stdout = subprocess.PIPE, env=env)
        out = p.communicate()[0].strip()
        self.assertEqual(out, unichr(0xa2).encode("cp424"))

        env["PYTHONIOENCODING"] = "ascii:replace"
        p = subprocess.Popen([sys.executable, "-c", 'print unichr(0xa2)'],
                             stdout = subprocess.PIPE, env=env)
        out = p.communicate()[0].strip()
        self.assertEqual(out, '?') 

def test_stdout_none(self):
        # .stdout is None when not redirected, and the child's stdout will
        # be inherited from the parent.  In order to test this we run a
        # subprocess in a subprocess:
        # this_test
        #   \-- subprocess created by this test (parent)
        #          \-- subprocess created by the parent subprocess (child)
        # The parent doesn't specify stdout, so the child will use the
        # parent's stdout.  This test checks that the message printed by the
        # child goes to the parent stdout.  The parent also checks that the
        # child's stdout is None.  See #11963.
        code = ('import sys; from subprocess import Popen, PIPE;'
                'p = Popen([sys.executable, "-c", "print \'test_stdout_none\'"],'
                '          stdin=PIPE, stderr=PIPE);'
                'p.wait(); assert p.stdout is None;')
        p = subprocess.Popen([sys.executable, "-c", code],
                             stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        self.addCleanup(p.stdout.close)
        self.addCleanup(p.stderr.close)
        out, err = p.communicate()
        self.assertEqual(p.returncode, 0, err)
        self.assertEqual(out.rstrip(), 'test_stdout_none') 

def test_stdout_filedes_of_stdout(self):
        # stdout is set to 1 (#1531862).
        # To avoid printing the text on stdout, we do something similar to
        # test_stdout_none (see above).  The parent subprocess calls the child
        # subprocess passing stdout=1, and this test uses stdout=PIPE in
        # order to capture and check the output of the parent. See #11963.
        code = ('import sys, subprocess; '
                'rc = subprocess.call([sys.executable, "-c", '
                '    "import os, sys; sys.exit(os.write(sys.stdout.fileno(), '
                     '\'test with stdout=1\'))"], stdout=1); '
                'assert rc == 18')
        p = subprocess.Popen([sys.executable, "-c", code],
                             stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        self.addCleanup(p.stdout.close)
        self.addCleanup(p.stderr.close)
        out, err = p.communicate()
        self.assertEqual(p.returncode, 0, err)
        self.assertEqual(out.rstrip(), 'test with stdout=1') 

def test_cwd(self):
        tmpdir = tempfile.gettempdir()
        # We cannot use os.path.realpath to canonicalize the path,
        # since it doesn't expand Tru64 {memb} strings. See bug 1063571.
        cwd = os.getcwd()
        os.chdir(tmpdir)
        tmpdir = os.getcwd()
        os.chdir(cwd)
        p = subprocess.Popen([sys.executable, "-c",
                          'import sys,os;'
                          'sys.stdout.write(os.getcwd())'],
                         stdout=subprocess.PIPE,
                         cwd=tmpdir)
        self.addCleanup(p.stdout.close)
        normcase = os.path.normcase
        self.assertEqual(normcase(p.stdout.read()), normcase(tmpdir)) 

def test_communicate(self):
        p = subprocess.Popen([sys.executable, "-c",
                          'import sys,os;'
                          'sys.stderr.write("pineapple");'
                          'sys.stdout.write(sys.stdin.read())'],
                         stdin=subprocess.PIPE,
                         stdout=subprocess.PIPE,
                         stderr=subprocess.PIPE)
        self.addCleanup(p.stdout.close)
        self.addCleanup(p.stderr.close)
        self.addCleanup(p.stdin.close)
        (stdout, stderr) = p.communicate("banana")
        self.assertEqual(stdout, "banana")
        self.assertStderrEqual(stderr, "pineapple")

    # This test is Linux specific for simplicity to at least have
    # some coverage.  It is not a platform specific bug. 

def test_communicate_pipe_buf(self):
        # communicate() with writes larger than pipe_buf
        # This test will probably deadlock rather than fail, if
        # communicate() does not work properly.
        x, y = os.pipe()
        if mswindows:
            pipe_buf = 512
        else:
            pipe_buf = os.fpathconf(x, "PC_PIPE_BUF")
        os.close(x)
        os.close(y)
        p = subprocess.Popen([sys.executable, "-c",
                          'import sys,os;'
                          'sys.stdout.write(sys.stdin.read(47));'
                          'sys.stderr.write("xyz"*%d);'
                          'sys.stdout.write(sys.stdin.read())' % pipe_buf],
                         stdin=subprocess.PIPE,
                         stdout=subprocess.PIPE,
                         stderr=subprocess.PIPE)
        self.addCleanup(p.stdout.close)
        self.addCleanup(p.stderr.close)
        self.addCleanup(p.stdin.close)
        string_to_write = "abc"*pipe_buf
        (stdout, stderr) = p.communicate(string_to_write)
        self.assertEqual(stdout, string_to_write) 

def test_failed_child_execute_fd_leak(self):
        """Test for the fork() failure fd leak reported in issue16327."""
        fd_directory = '/proc/%d/fd' % os.getpid()
        fds_before_popen = os.listdir(fd_directory)
        with self.assertRaises(PopenTestException):
            PopenExecuteChildRaises(
                    [sys.executable, '-c', 'pass'], stdin=subprocess.PIPE,
                    stdout=subprocess.PIPE, stderr=subprocess.PIPE)

        # NOTE: This test doesn't verify that the real _execute_child
        # does not close the file descriptors itself on the way out
        # during an exception.  Code inspection has confirmed that.

        fds_after_exception = os.listdir(fd_directory)
        self.assertEqual(fds_before_popen, fds_after_exception)


# context manager 

def test_open_http_url(self):
        with temp_dir() as server_dir:
            hello_path = server_dir / 'hello'
            with open(hello_path, 'w') as out_f:
                out_f.write('world')

            # First, check file:// URLs
            with open_url(hello_path.file_url()) as in_f:
                self.assertEqual(b'world', in_f.read())

            # Now, http:// URLs
            with subprocess.Popen([
                sys.executable, '-c', '''
import http.server as hs
with hs.HTTPServer(('localhost', 0), hs.SimpleHTTPRequestHandler) as httpd:
    print('http://{}:{}/'.format(*httpd.socket.getsockname()), flush=True)
    httpd.serve_forever()
                ''',
            ], cwd=server_dir, stdout=subprocess.PIPE) as proc:
                try:
                    with open_url(
                        proc.stdout.readline().decode().rstrip('\n') + 'hello'
                    ) as in_f:
                        self.assertEqual(b'world', in_f.read())
                finally:
                    proc.kill() 

def test_path_from_argparse(self):
        res = subprocess.run([
            sys.executable, '-c', 'import sys;print(repr(sys.argv[1]))',
            _BAD_UTF,
        ], stdout=subprocess.PIPE)
        # Demangle non-UTF bytes in the same way that `sys.argv` mangles them.
        self.assertEqual(_BAD_UTF, Path.from_argparse(
            ast.literal_eval(res.stdout.rstrip(b'\n').decode())
        )) 

def test():
    """Run PyTests with the coverage plugin."""
    _set_cwd()
    return_code = _run_cli_cmd(
        [sys.executable, "-m", "pytest", "-v", "--cov=ubittool", "tests/"]
    )
    if return_code != 0:
        sys.exit(return_code)
    return 0 

def _ubittool_cmd(cmd_list):
    """Invoke the uBitTool app using different methods and return outputs.

    :param cmd_list: List of cli argument to add to ubittool invocation.
    """
    module = [sys.executable, "-m", "ubittool"]
    module.extend(cmd_list)
    cmd = ["ubit"]
    cmd.extend(cmd_list)
    script = [sys.executable, "ubittool/cli.py"]
    script.extend(cmd_list)
    return [_run_cli_cmd(module), _run_cli_cmd(cmd), _run_cli_cmd(script)] 

def main():
    args = sys.argv[1:]
    os.environ['PYTHONPATH'] = boot_dir
    # 执行后面的 python 程序命令
    # sys.executable 是 python 解释器程序的绝对路径 ``which python``
    # >>> sys.executable
    # '/usr/local/var/pyenv/versions/3.5.1/bin/python3.5'
    os.execl(sys.executable, sys.executable, *args) 

def main(root, program, args=None):
    """Command-line entry point

    Arguments:
        root (str): Directory from which executable is launched
        program (str): Name of program, e.g. pyblish-qml
        async (bool, optional): Run asynchronously, default is False
        console (bool, optional): Run with console, default is False
        args (list, optional): Additional arguments passed to program

    """

    setup(root)

    args = [sys.executable,
            "-u",  # Unbuffered, for outputting to stdout below
            "-m", program] + args or []

    CREATE_NO_WINDOW = 0x08000000
    popen = subprocess.Popen(args,
                             creationflags=CREATE_NO_WINDOW,
                             stdout=subprocess.PIPE,
                             stderr=subprocess.STDOUT)

    for line in iter(popen.stdout.readline, b""):
        sys.stdout.write(line)

    popen.communicate()  # Block until done 

def _init_non_posix(vars):
    """Initialize the module as appropriate for NT"""
    # set basic install directories
    vars['LIBDEST'] = get_path('stdlib')
    vars['BINLIBDEST'] = get_path('platstdlib')
    vars['INCLUDEPY'] = get_path('include')
    vars['SO'] = '.pyd'
    vars['EXE'] = '.exe'
    vars['VERSION'] = _PY_VERSION_SHORT_NO_DOT
    vars['BINDIR'] = os.path.dirname(_safe_realpath(sys.executable))

#
# public APIs
# 

def get_python_inc(plat_specific=0, prefix=None):
    """Return the directory containing installed Python header files.

    If 'plat_specific' is false (the default), this is the path to the
    non-platform-specific header files, i.e. Python.h and so on;
    otherwise, this is the path to platform-specific header files
    (namely pyconfig.h).

    If 'prefix' is supplied, use it instead of sys.prefix or
    sys.exec_prefix -- i.e., ignore 'plat_specific'.
    """
    if prefix is None:
        prefix = plat_specific and EXEC_PREFIX or PREFIX

    if os.name == "posix":
        if python_build:
            buildir = os.path.dirname(sys.executable)
            if plat_specific:
                # python.h is located in the buildir
                inc_dir = buildir
            else:
                # the source dir is relative to the buildir
                srcdir = os.path.abspath(os.path.join(buildir,
                                         get_config_var('srcdir')))
                # Include is located in the srcdir
                inc_dir = os.path.join(srcdir, "Include")
            return inc_dir
        return os.path.join(prefix, "include", "python" + get_python_version())
    elif os.name == "nt":
        return os.path.join(prefix, "include")
    elif os.name == "os2":
        return os.path.join(prefix, "Include")
    else:
        raise DistutilsPlatformError(
            "I don't know where Python installs its C header files "
            "on platform '%s'" % os.name) 

def get_build_scripts_cmd(self, target, scripts):
        import sys
        dist = Distribution()
        dist.scripts = scripts
        dist.command_obj["build"] = support.DummyCommand(
            build_scripts=target,
            force=1,
            executable=sys.executable
            )
        return build_scripts(dist) 

def test_version_int(self):
        source = self.mkdtemp()
        target = self.mkdtemp()
        expected = self.write_sample_scripts(source)


        cmd = self.get_build_scripts_cmd(target,
                                         [os.path.join(source, fn)
                                          for fn in expected])
        cmd.finalize_options()

        # http://bugs.python.org/issue4524
        #
        # On linux-g++-32 with command line `./configure --enable-ipv6
        # --with-suffix=3`, python is compiled okay but the build scripts
        # failed when writing the name of the executable
        old = sysconfig.get_config_vars().get('VERSION')
        sysconfig._CONFIG_VARS['VERSION'] = 4
        try:
            cmd.run()
        finally:
            if old is not None:
                sysconfig._CONFIG_VARS['VERSION'] = old

        built = os.listdir(target)
        for name in expected:
            self.assertIn(name, built) 

def test_finalize_options(self):
        pkg_dir, dist = self.create_dist()
        cmd = build(dist)
        cmd.finalize_options()

        # if not specified, plat_name gets the current platform
        self.assertEqual(cmd.plat_name, get_platform())

        # build_purelib is build + lib
        wanted = os.path.join(cmd.build_base, 'lib')
        self.assertEqual(cmd.build_purelib, wanted)

        # build_platlib is 'build/lib.platform-x.x[-pydebug]'
        # examples:
        #   build/lib.macosx-10.3-i386-2.7
        plat_spec = '.%s-%s' % (cmd.plat_name, sys.version[0:3])
        if hasattr(sys, 'gettotalrefcount'):
            self.assertTrue(cmd.build_platlib.endswith('-pydebug'))
            plat_spec += '-pydebug'
        wanted = os.path.join(cmd.build_base, 'lib' + plat_spec)
        self.assertEqual(cmd.build_platlib, wanted)

        # by default, build_lib = build_purelib
        self.assertEqual(cmd.build_lib, cmd.build_purelib)

        # build_temp is build/temp.<plat>
        wanted = os.path.join(cmd.build_base, 'temp' + plat_spec)
        self.assertEqual(cmd.build_temp, wanted)

        # build_scripts is build/scripts-x.x
        wanted = os.path.join(cmd.build_base, 'scripts-' +  sys.version[0:3])
        self.assertEqual(cmd.build_scripts, wanted)

        # executable is os.path.normpath(sys.executable)
        self.assertEqual(cmd.executable, os.path.normpath(sys.executable)) 

def initialize_options(self):
        self.build_base = 'build'
        # these are decided only after 'build_base' has its final value
        # (unless overridden by the user or client)
        self.build_purelib = None
        self.build_platlib = None
        self.build_lib = None
        self.build_temp = None
        self.build_scripts = None
        self.compiler = None
        self.plat_name = None
        self.debug = None
        self.force = 0
        self.executable = None 

def test_stdin_stdout(self):
        proc = subprocess.Popen(
                (sys.executable, '-m', 'json.tool'),
                stdin=subprocess.PIPE, stdout=subprocess.PIPE)
        out, err = proc.communicate(self.data.encode())
        self.assertEqual(out.splitlines(), self.expect.encode().splitlines())
        self.assertEqual(err, None) 

def _run_module_as_main(mod_name, alter_argv=True):
    """Runs the designated module in the __main__ namespace

       Note that the executed module will have full access to the
       __main__ namespace. If this is not desirable, the run_module()
       function should be used to run the module code in a fresh namespace.

       At the very least, these variables in __main__ will be overwritten:
           __name__
           __file__
           __loader__
           __package__
    """
    try:
        if alter_argv or mod_name != "__main__": # i.e. -m switch
            mod_name, loader, code, fname = _get_module_details(mod_name)
        else:          # i.e. directory or zipfile execution
            mod_name, loader, code, fname = _get_main_module_details()
    except ImportError as exc:
        msg = "%s: %s" % (sys.executable, str(exc))
        sys.exit(msg)
    pkg_name = mod_name.rpartition('.')[0]
    main_globals = sys.modules["__main__"].__dict__
    if alter_argv:
        sys.argv[0] = fname
    return _run_code(code, main_globals, None,
                     "__main__", fname, loader, pkg_name) 

def is_executable(self, path):
        """Test whether argument path is an executable file."""
        return executable(path) 

def executable(path):
    """Test for executable file."""
    try:
        st = os.stat(path)
    except os.error:
        return False
    return st.st_mode & 0111 != 0 

def test_finalize_with_trace(self):
        # Issue1733757
        # Avoid a deadlock when sys.settrace steps into threading._shutdown
        p = subprocess.Popen([sys.executable, "-c", """if 1:
            import sys, threading

            # A deadlock-killer, to prevent the
            # testsuite to hang forever
            def killer():
                import os, time
                time.sleep(2)
                print 'program blocked; aborting'
                os._exit(2)
            t = threading.Thread(target=killer)
            t.daemon = True
            t.start()

            # This is the trace function
            def func(frame, event, arg):
                threading.current_thread()
                return func

            sys.settrace(func)
            """],
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE)
        self.addCleanup(p.stdout.close)
        self.addCleanup(p.stderr.close)
        stdout, stderr = p.communicate()
        rc = p.returncode
        self.assertFalse(rc == 2, "interpreted was blocked")
        self.assertTrue(rc == 0,
                        "Unexpected error: " + repr(stderr)) 

def assertScriptHasOutput(self, script, expected_output):
        p = subprocess.Popen([sys.executable, "-c", script],
                             stdout=subprocess.PIPE)
        rc = p.wait()
        data = p.stdout.read().decode().replace('\r', '')
        self.assertEqual(rc, 0, "Unexpected error")
        self.assertEqual(data, expected_output) 

def test_recursion_limit(self):
        # Issue 9670
        # test that excessive recursion within a non-main thread causes
        # an exception rather than crashing the interpreter on platforms
        # like Mac OS X or FreeBSD which have small default stack sizes
        # for threads
        script = """if True:
            import threading

            def recurse():
                return recurse()

            def outer():
                try:
                    recurse()
                except RuntimeError:
                    pass

            w = threading.Thread(target=outer)
            w.start()
            w.join()
            print('end of main thread')
            """
        expected_output = "end of main thread\n"
        p = subprocess.Popen([sys.executable, "-c", script],
                             stdout=subprocess.PIPE)
        stdout, stderr = p.communicate()
        data = stdout.decode().replace('\r', '')
        self.assertEqual(p.returncode, 0, "Unexpected error")
        self.assertEqual(data, expected_output) 

def test_single_warning(self):
        newenv = os.environ.copy()
        newenv["PYTHONWARNINGS"] = "ignore::DeprecationWarning"
        p = subprocess.Popen([sys.executable,
                "-c", "import sys; sys.stdout.write(str(sys.warnoptions))"],
                stdout=subprocess.PIPE, env=newenv)
        self.assertEqual(p.communicate()[0], "['ignore::DeprecationWarning']")
        self.assertEqual(p.wait(), 0) 

def test_comma_separated_warnings(self):
        newenv = os.environ.copy()
        newenv["PYTHONWARNINGS"] = ("ignore::DeprecationWarning,"
                                    "ignore::UnicodeWarning")
        p = subprocess.Popen([sys.executable,
                "-c", "import sys; sys.stdout.write(str(sys.warnoptions))"],
                stdout=subprocess.PIPE, env=newenv)
        self.assertEqual(p.communicate()[0],
                "['ignore::DeprecationWarning', 'ignore::UnicodeWarning']")
        self.assertEqual(p.wait(), 0) 

def test_envvar_and_command_line(self):
        newenv = os.environ.copy()
        newenv["PYTHONWARNINGS"] = "ignore::DeprecationWarning"
        p = subprocess.Popen([sys.executable, "-W" "ignore::UnicodeWarning",
                "-c", "import sys; sys.stdout.write(str(sys.warnoptions))"],
                stdout=subprocess.PIPE, env=newenv)
        self.assertEqual(p.communicate()[0],
                "['ignore::UnicodeWarning', 'ignore::DeprecationWarning']")
        self.assertEqual(p.wait(), 0) 

def testLoadWithUNC(self):
        # Build a UNC path from the regular path.
        # Something like
        #   \\%COMPUTERNAME%\c$\python27\python.exe

        fullname = os.path.abspath(sys.executable)
        if fullname[1] != ':':
            self.skipTest('unusable path: %r' % fullname)
        unc_name = r'\\%s\%s$\%s' % (os.environ['COMPUTERNAME'],
                                    fullname[0],
                                    fullname[3:])

        with test_support.EnvironmentVarGuard() as env:
            env.unset("TCL_LIBRARY")
            cmd = '%s -c "import Tkinter; print Tkinter"' % (unc_name,)

            try:
                p = Popen(cmd, stdout=PIPE, stderr=PIPE)
            except WindowsError as e:
                if e.winerror == 5:
                    self.skipTest('Not permitted to start the child process')
                else:
                    raise

            out_data, err_data = p.communicate()

            msg = '\n\n'.join(['"Tkinter.py" not in output',
                               'Command:', cmd,
                               'stdout:', out_data,
                               'stderr:', err_data])

            self.assertIn('Tkinter.py', out_data, msg)

            self.assertEqual(p.wait(), 0, 'Non-zero exit code') 

def spawn_python(*args, **kwargs):
    cmd_line = [sys.executable, '-E']
    cmd_line.extend(args)
    return subprocess.Popen(cmd_line, stdin=subprocess.PIPE,
                            stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
                            **kwargs) 

def test_symlink(self):
        # Issue 7880
        symlink = get_attribute(os, "symlink")
        def get(python):
            cmd = [python, '-c',
                   'import sysconfig; print sysconfig.get_platform()']
            p = subprocess.Popen(cmd, stdout=subprocess.PIPE)
            return p.communicate()
        real = os.path.realpath(sys.executable)
        link = os.path.abspath(TESTFN)
        symlink(real, link)
        try:
            self.assertEqual(get(real), get(link))
        finally:
            unlink(link) 

def test_unicode(self):
        import subprocess

        def get_message(encoding, *code):
            code = '\n'.join(code)
            env = os.environ.copy()
            env['PYTHONIOENCODING'] = encoding
            process = subprocess.Popen([sys.executable, "-c", code],
                                       stdout=subprocess.PIPE, env=env)
            stdout, stderr = process.communicate()
            self.assertEqual(process.returncode, 0)
            return stdout

        def check_message(text, encoding, expected):
            stdout = get_message(encoding,
                "import sys",
                "sys.stdout.write(%r)" % text,
                "sys.stdout.flush()")
            self.assertEqual(stdout, expected)

        # test the encoding
        check_message(u'15\u20ac', "iso-8859-15", "15\xa4")
        check_message(u'15\u20ac', "utf-8", '15\xe2\x82\xac')
        check_message(u'15\u20ac', "utf-16-le", '1\x005\x00\xac\x20')

        # test the error handler
        check_message(u'15\u20ac', "iso-8859-1:ignore", "15")
        check_message(u'15\u20ac', "iso-8859-1:replace", "15?")
        check_message(u'15\u20ac', "iso-8859-1:backslashreplace", "15\\u20ac")

        # test the buffer API
        for objtype in ('buffer', 'bytearray'):
            stdout = get_message('ascii',
                'import sys',
                r'sys.stdout.write(%s("\xe9"))' % objtype,
                'sys.stdout.flush()')
            self.assertEqual(stdout, "\xe9") 

def pindent(self, source, *args):
        proc = subprocess.Popen(
                (sys.executable, self.script) + args,
                stdin=subprocess.PIPE, stdout=subprocess.PIPE,
                universal_newlines=True)
        out, err = proc.communicate(source)
        self.assertIsNone(err)
        return out 

def setUp(self):
        BaseTestCase.setUp(self)
        self.parent_dir = tempfile.mkdtemp()
        self.cgi_dir = os.path.join(self.parent_dir, 'cgi-bin')
        self.cgi_child_dir = os.path.join(self.cgi_dir, 'child-dir')
        os.mkdir(self.cgi_dir)
        os.mkdir(self.cgi_child_dir)

        # The shebang line should be pure ASCII: use symlink if possible.
        # See issue #7668.
        if hasattr(os, 'symlink'):
            self.pythonexe = os.path.join(self.parent_dir, 'python')
            os.symlink(sys.executable, self.pythonexe)
        else:
            self.pythonexe = sys.executable

        self.nocgi_path = os.path.join(self.parent_dir, 'nocgi.py')
        with open(self.nocgi_path, 'w') as fp:
            fp.write(cgi_file1 % self.pythonexe)
        os.chmod(self.nocgi_path, 0777)

        self.file1_path = os.path.join(self.cgi_dir, 'file1.py')
        with open(self.file1_path, 'w') as file1:
            file1.write(cgi_file1 % self.pythonexe)
        os.chmod(self.file1_path, 0777)

        self.file2_path = os.path.join(self.cgi_dir, 'file2.py')
        with open(self.file2_path, 'w') as file2:
            file2.write(cgi_file2 % self.pythonexe)
        os.chmod(self.file2_path, 0777)

        self.file3_path = os.path.join(self.cgi_child_dir, 'file3.py')
        with open(self.file3_path, 'w') as file3:
            file3.write(cgi_file1 % self.pythonexe)
        os.chmod(self.file3_path, 0777)

        self.cwd = os.getcwd()
        os.chdir(self.parent_dir) 

def tearDown(self):
        try:
            os.chdir(self.cwd)
            if self.pythonexe != sys.executable:
                os.remove(self.pythonexe)
            os.remove(self.nocgi_path)
            os.remove(self.file1_path)
            os.remove(self.file2_path)
            os.remove(self.file3_path)
            os.rmdir(self.cgi_child_dir)
            os.rmdir(self.cgi_dir)
            os.rmdir(self.parent_dir)
        finally:
            BaseTestCase.tearDown(self) 

def test_call_seq(self):
        # call() function with sequence argument
        rc = subprocess.call([sys.executable, "-c",
                              "import sys; sys.exit(47)"])
        self.assertEqual(rc, 47) 

def test_check_call_zero(self):
        # check_call() function with zero return code
        rc = subprocess.check_call([sys.executable, "-c",
                                    "import sys; sys.exit(0)"])
        self.assertEqual(rc, 0) 

def test_check_call_nonzero(self):
        # check_call() function with non-zero return code
        with self.assertRaises(subprocess.CalledProcessError) as c:
            subprocess.check_call([sys.executable, "-c",
                                   "import sys; sys.exit(47)"])
        self.assertEqual(c.exception.returncode, 47) 

def test_check_output(self):
        # check_output() function with zero return code
        output = subprocess.check_output(
                [sys.executable, "-c", "print 'BDFL'"])
        self.assertIn('BDFL', output) 

def test_check_output_nonzero(self):
        # check_call() function with non-zero return code
        with self.assertRaises(subprocess.CalledProcessError) as c:
            subprocess.check_output(
                    [sys.executable, "-c", "import sys; sys.exit(5)"])
        self.assertEqual(c.exception.returncode, 5) 

def test_check_output_stdout_arg(self):
        # check_output() function stderr redirected to stdout
        with self.assertRaises(ValueError) as c:
            output = subprocess.check_output(
                    [sys.executable, "-c", "print 'will not be run'"],
                    stdout=sys.stdout)
            self.fail("Expected ValueError when stdout arg supplied.")
        self.assertIn('stdout', c.exception.args[0])