Python sys.platform() Examples

def __init__(self, bus):
        self.bus = bus
        # Set default handlers
        self.handlers = {'SIGTERM': self.bus.exit,
                         'SIGHUP': self.handle_SIGHUP,
                         'SIGUSR1': self.bus.graceful,
                         }

        if sys.platform[:4] == 'java':
            del self.handlers['SIGUSR1']
            self.handlers['SIGUSR2'] = self.bus.graceful
            self.bus.log('SIGUSR1 cannot be set on the JVM platform. '
                         'Using SIGUSR2 instead.')
            self.handlers['SIGINT'] = self._jython_SIGINT_handler

        self._previous_handlers = {}
        # used to determine is the process is a daemon in `self._is_daemonized`
        self._original_pid = os.getpid() 

def rmtree(path):
    try:
        rmtree_(path)
    except (IOError, OSError):
        # As it turns out nested node_modules directories are a bad
        # idea, especially on Windows.  It turns out this situation
        # is rather common, so we need a way to deal with this.  As
        # it turns out a workaround exists around this legacy win32
        # issue through this proprietary prefix:
        path_ = '\\\\?\\' + path if sys.platform == 'win32' else path

        # and try again
        try:
            rmtree_(path_)
        except (IOError, OSError):
            pass

        # Don't blow the remaining teardown up if it fails anyway.
        if exists(path):
            warnings.warn("rmtree failed to remove %r" % path) 

def _syscmd_uname(option,default=''):

    """ Interface to the system's uname command.
    """
    if sys.platform in ('dos','win32','win16','os2'):
        # XXX Others too ?
        return default
    try:
        f = os.popen('uname %s 2> %s' % (option, DEV_NULL))
    except (AttributeError,os.error):
        return default
    output = f.read().strip()
    rc = f.close()
    if not output or rc:
        return default
    else:
        return output 

def _requires_unix_version(sysname, min_version):
    """Decorator raising SkipTest if the OS is `sysname` and the version is less
    than `min_version`.

    For example, @_requires_unix_version('FreeBSD', (7, 2)) raises SkipTest if
    the FreeBSD version is less than 7.2.
    """
    def decorator(func):
        @functools.wraps(func)
        def wrapper(*args, **kw):
            if platform.system() == sysname:
                version_txt = platform.release().split('-', 1)[0]
                try:
                    version = tuple(map(int, version_txt.split('.')))
                except ValueError:
                    pass
                else:
                    if version < min_version:
                        min_version_txt = '.'.join(map(str, min_version))
                        raise unittest.SkipTest(
                            "%s version %s or higher required, not %s"
                            % (sysname, min_version_txt, version_txt))
        return wrapper
    return decorator 

def wr( self, str ):
    if ( self.debug ):
      print("FT600_WR:" +  str );
    str = "~".join( str );# only using 8bits of 16bit FT600, so pad with ~
    bytes_to_write = len( str );# str is now "~1~2~3 .. ~e~f" - Twice as long
    channel = 0;
    result = False;
    timeout = 5;
    tx_pipe = 0x02 + channel;
    if sys.platform == 'linux2':
      tx_pipe -= 0x02;
    if ( sys.version_info.major == 3 ):
      str = str.encode('latin1');
    xferd = 0
    while ( xferd != bytes_to_write ):
      # write data to specified pipe
      xferd += self.D3XX.writePipe(tx_pipe,str,bytes_to_write-xferd);
    return; 

def ale_load_from_rom(rom_path, display_screen):
    rng = get_numpy_rng()
    try:
        from ale_python_interface import ALEInterface
    except ImportError as e:
        raise ImportError('Unable to import the python package of Arcade Learning Environment. ' \
                           'ALE may not have been installed correctly. Refer to ' \
                           '`https://github.com/mgbellemare/Arcade-Learning-Environment` for some' \
                           'installation guidance')

    ale = ALEInterface()
    ale.setInt(b'random_seed', rng.randint(1000))
    if display_screen:
        import sys
        if sys.platform == 'darwin':
            import pygame
            pygame.init()
            ale.setBool(b'sound', False) # Sound doesn't work on OSX
        ale.setBool(b'display_screen', True)
    else:
        ale.setBool(b'display_screen', False)
    ale.setFloat(b'repeat_action_probability', 0)
    ale.loadROM(str.encode(rom_path))
    return ale 

def makelink(self, tarinfo, targetpath):
        """Make a (symbolic) link called targetpath. If it cannot be created
          (platform limitation), we try to make a copy of the referenced file
          instead of a link.
        """
        try:
            # For systems that support symbolic and hard links.
            if tarinfo.issym():
                os.symlink(tarinfo.linkname, targetpath)
            else:
                # See extract().
                if os.path.exists(tarinfo._link_target):
                    os.link(tarinfo._link_target, targetpath)
                else:
                    self._extract_member(self._find_link_target(tarinfo),
                                         targetpath)
        except symlink_exception:
            try:
                self._extract_member(self._find_link_target(tarinfo),
                                     targetpath)
            except KeyError:
                raise ExtractError("unable to resolve link inside archive") 

def parse_arguments():
    """Parse the arguments"""
    parser = argparse.ArgumentParser()
    parser.add_argument("--setup", "-s", action="store_true")
    parser.add_argument("--phone", "-p", action="append")
    parser.add_argument("--token", "-t", action="append", dest="tokens")
    parser.add_argument("--heroku", action="store_true")
    parser.add_argument("--local-db", dest="local", action="store_true")
    parser.add_argument("--web-only", dest="web_only", action="store_true")
    parser.add_argument("--no-web", dest="web", action="store_false")
    parser.add_argument("--heroku-web-internal", dest="heroku_web_internal", action="store_true",
                        help="This is for internal use only. If you use it, things will go wrong.")
    arguments = parser.parse_args()
    logging.debug(arguments)
    if sys.platform == "win32":
        # Subprocess support; not needed in 3.8 but not harmful
        asyncio.set_event_loop(asyncio.ProactorEventLoop())

    return arguments 

def test_dsa_2048_sha1_sign(self):
        def do_run():
            original_data = b'This is data to sign'
            private = asymmetric.load_private_key(os.path.join(fixtures_dir, 'keys/test-dsa-2048.key'))
            public = asymmetric.load_public_key(os.path.join(fixtures_dir, 'keys/test-dsa-2048.crt'))

            signature = asymmetric.dsa_sign(private, original_data, 'sha1')
            self.assertIsInstance(signature, byte_cls)

            asymmetric.dsa_verify(public, signature, original_data, 'sha1')

        if sys.platform == 'win32':
            with self.assertRaises(errors.AsymmetricKeyError):
                do_run()
        else:
            do_run() 

def cd_sys_type():
    """
    :return: 平台类型 0 win, 1 mac  2 Linux 3 其他
    """
    """
    a = sys.platform
    if a == 'win32' or a == 'win64':
        return 0
    elif a == 'darwin':
        return 1
    else:
        return 2
    """
    a = platform.system()
    if a == 'Windows':
        return 0
    elif a == 'Darwin':
        return 1
    elif a == 'Linux':
        return 2
    else:
        return 3 

def train(env_id, num_timesteps, seed, policy):

    ncpu = multiprocessing.cpu_count()
    if sys.platform == 'darwin': ncpu //= 2
    config = tf.ConfigProto(allow_soft_placement=True,
                            intra_op_parallelism_threads=ncpu,
                            inter_op_parallelism_threads=ncpu)
    config.gpu_options.allow_growth = True #pylint: disable=E1101
    tf.Session(config=config).__enter__()

    env = VecFrameStack(make_atari_env(env_id, 8, seed), 4)
    policy = {'cnn' : CnnPolicy, 'lstm' : LstmPolicy, 'lnlstm' : LnLstmPolicy}[policy]
    ppo2.learn(policy=policy, env=env, nsteps=128, nminibatches=4,
        lam=0.95, gamma=0.99, noptepochs=4, log_interval=1,
        ent_coef=.01,
        lr=lambda f : f * 2.5e-4,
        cliprange=lambda f : f * 0.1,
        total_timesteps=int(num_timesteps * 1.1)) 

def find_media_viewer():
    global VWR
    VWR_LIST = [
        "feh",
        "gio",
        "sxiv",
        "gnome-open",
        "gvfs-open",
        "xdg-open",
        "kde-open",
        "firefox"
    ]
    if sys.platform == "win32":
        VWR = ["start"]
    elif sys.platform == "darwin":
        VWR = ["open"]
    else:
        for i in VWR_LIST:
            if shutil.which(i) is not None:
                VWR = [i]
                break

    if VWR[0] in {"gio"}:
        VWR.append("open") 

def finalize_env(env):
    """
    Produce a platform specific env for passing into subprocess.Popen
    family of external process calling methods, and the supplied env
    will be updated on top of it.  Returns a new env.
    """

    keys = _PLATFORM_ENV_KEYS.get(sys.platform, [])
    if 'PATH' not in keys:
        # this MUST be available due to Node.js (and others really)
        # needing something to look for binary locations when it shells
        # out to other binaries.
        keys.append('PATH')
    results = {
        key: os.environ.get(key, '') for key in keys
    }
    results.update(env)
    return results 

def build_extensions(self):
        compiler = self.compiler.compiler_type
        if compiler == 'msvc': # visual studio
            for e in self.extensions:
                e.extra_compile_args += ['/O2', '/openmp']
        else:
            for e in self.extensions:
                e.extra_compile_args += ['-O3', '-march=native', '-fopenmp']
                e.extra_link_args += ['-fopenmp']

                if e.language == "c++":
                    e.extra_compile_args += ['-std=c++11']

            ### Remove this code if you have a mac with gcc or clang + openmp
            if platform[:3] == "dar":
                for e in self.extensions:
                    e.extra_compile_args = [arg for arg in e.extra_compile_args if arg != '-fopenmp']
                    e.extra_link_args    = [arg for arg in e.extra_link_args    if arg != '-fopenmp']
        build_ext.build_extensions(self) 

def hide_cursor():
	"""
	Turns the cursor off in the terminal.
	"""

	global is_conemu

	if not sys.platform == 'win32':
		sys.stdout.write('\033[?25l')
		is_conemu = False

	else:
		ci = ConsoleCursorInfo()
		handle = ctypes.windll.kernel32.GetStdHandle(-11)
		ctypes.windll.kernel32.GetConsoleCursorInfo(handle, ctypes.byref(ci))
		ci.visible = False
		ctypes.windll.kernel32.SetConsoleCursorInfo(handle, ctypes.byref(ci))
		is_conemu = os.environ.get('ConEmuANSI') == 'ON'


# some characters are forbidden in NTFS, but are not in ext4. the most popular of these characters
# seems to be the colon character. LXSS solves this issue by escaping the character on NTFS.
# while this seems like a dumb implementation, it will be called a lot of times inside the
# decompression loop, so it has to be fast: http://stackoverflow.com/a/27086669/156626 

def test_found_win32(self):
        sys.platform = 'win32'
        tempdir = os.environ['PATH'] = mkdtemp(self)
        os.environ['PATHEXT'] = pathsep.join(('.com', '.exe', '.bat'))
        f = join(tempdir, 'binary.exe')
        with open(f, 'w'):
            pass
        os.chmod(f, 0o777)
        self.assertEqual(which('binary'), f)
        self.assertEqual(which('binary.exe'), f)
        self.assertEqual(which(f), f)
        self.assertIsNone(which('binary.com'))

        os.environ['PATH'] = ''
        self.assertEqual(which('binary', path=tempdir), f)
        self.assertEqual(which('binary.exe', path=tempdir), f)
        self.assertEqual(which(f, path=tempdir), f)
        self.assertIsNone(which('binary.com', path=tempdir)) 

def test_finalize_env_win32(self):
        sys.platform = 'win32'

        # when os.environ is empty or missing the required keys, the
        # values will be empty strings.
        os.environ = {}
        self.assertEqual(finalize_env({}), {
            'APPDATA': '', 'PATH': '', 'PATHEXT': '', 'SYSTEMROOT': ''})

        # should be identical with the keys copied
        os.environ['APPDATA'] = 'C:\\Users\\Guest\\AppData\\Roaming'
        os.environ['PATH'] = 'C:\\Windows'
        os.environ['PATHEXT'] = pathsep.join(('.com', '.exe', '.bat'))
        os.environ['SYSTEMROOT'] = 'C:\\Windows'
        self.assertEqual(finalize_env({}), os.environ)

    # This test is done with conjunction with finalize_env to mimic how
    # this is typically used within the rest of the library. 

def _find_w9xpopen(self):
            """Find and return absolut path to w9xpopen.exe"""
            w9xpopen = os.path.join(
                            os.path.dirname(_winapi.GetModuleFileName(0)),
                                    "w9xpopen.exe")
            if not os.path.exists(w9xpopen):
                # Eeek - file-not-found - possibly an embedding
                # situation - see if we can locate it in sys.exec_prefix
                w9xpopen = os.path.join(os.path.dirname(sys.base_exec_prefix),
                                        "w9xpopen.exe")
                if not os.path.exists(w9xpopen):
                    raise RuntimeError("Cannot locate w9xpopen.exe, which is "
                                       "needed for Popen to work with your "
                                       "shell or platform.")
            return w9xpopen 

def do_vcs_install(manifest_in, versionfile_source, ipy):
    """Git-specific installation logic for Versioneer.

    For Git, this means creating/changing .gitattributes to mark _version.py
    for export-subst keyword substitution.
    """
    GITS = ["git"]
    if sys.platform == "win32":
        GITS = ["git.cmd", "git.exe"]
    files = [manifest_in, versionfile_source]
    if ipy:
        files.append(ipy)
    try:
        me = __file__
        if me.endswith(".pyc") or me.endswith(".pyo"):
            me = os.path.splitext(me)[0] + ".py"
        versioneer_file = os.path.relpath(me)
    except NameError:
        versioneer_file = "versioneer.py"
    files.append(versioneer_file)
    present = False
    try:
        f = open(".gitattributes", "r")
        for line in f.readlines():
            if line.strip().startswith(versionfile_source):
                if "export-subst" in line.strip().split()[1:]:
                    present = True
        f.close()
    except EnvironmentError:
        pass
    if not present:
        f = open(".gitattributes", "a+")
        f.write("%s export-subst\n" % versionfile_source)
        f.close()
        files.append(".gitattributes")
    run_command(GITS, ["add", "--"] + files) 

def __init__(self, filename="NoName", date_time=(1980,1,1,0,0,0)):
        self.orig_filename = filename   # Original file name in archive

        # Terminate the file name at the first null byte.  Null bytes in file
        # names are used as tricks by viruses in archives.
        null_byte = filename.find(chr(0))
        if null_byte >= 0:
            filename = filename[0:null_byte]
        # This is used to ensure paths in generated ZIP files always use
        # forward slashes as the directory separator, as required by the
        # ZIP format specification.
        if os.sep != "/" and os.sep in filename:
            filename = filename.replace(os.sep, "/")

        self.filename = filename        # Normalized file name
        self.date_time = date_time      # year, month, day, hour, min, sec

        if date_time[0] < 1980:
            raise ValueError('ZIP does not support timestamps before 1980')

        # Standard values:
        self.compress_type = ZIP_STORED # Type of compression for the file
        self.comment = b""              # Comment for each file
        self.extra = b""                # ZIP extra data
        if sys.platform == 'win32':
            self.create_system = 0          # System which created ZIP archive
        else:
            # Assume everything else is unix-y
            self.create_system = 3          # System which created ZIP archive
        self.create_version = DEFAULT_VERSION  # Version which created ZIP archive
        self.extract_version = DEFAULT_VERSION # Version needed to extract archive
        self.reserved = 0               # Must be zero
        self.flag_bits = 0              # ZIP flag bits
        self.volume = 0                 # Volume number of file header
        self.internal_attr = 0          # Internal attributes
        self.external_attr = 0          # External file attributes
        # Other attributes are set by class ZipFile:
        # header_offset         Byte offset to the file header
        # CRC                   CRC-32 of the uncompressed file
        # compress_size         Size of the compressed file
        # file_size             Size of the uncompressed file 

def backend():
    """
    :return:
        A unicode string of the backend being used: "openssl", "mac", "win",
        "winlegacy"
    """

    if _module_values['backend'] is not None:
        return _module_values['backend']

    with _backend_lock:
        if _module_values['backend'] is not None:
            return _module_values['backend']

        if sys.platform == 'win32':
            # Windows XP was major version 5, Vista was 6
            if sys.getwindowsversion()[0] < 6:
                _module_values['backend'] = 'winlegacy'
            else:
                _module_values['backend'] = 'win'
        elif sys.platform == 'darwin':
            _module_values['backend'] = 'mac'
        else:
            _module_values['backend'] = 'openssl'

        return _module_values['backend'] 

def _extract_member(self, member, targetpath, pwd):
        """Extract the ZipInfo object 'member' to a physical
           file on the path targetpath.
        """
        # build the destination pathname, replacing
        # forward slashes to platform specific separators.
        arcname = member.filename.replace('/', os.path.sep)

        if os.path.altsep:
            arcname = arcname.replace(os.path.altsep, os.path.sep)
        # interpret absolute pathname as relative, remove drive letter or
        # UNC path, redundant separators, "." and ".." components.
        arcname = os.path.splitdrive(arcname)[1]
        invalid_path_parts = ('', os.path.curdir, os.path.pardir)
        arcname = os.path.sep.join(x for x in arcname.split(os.path.sep)
                                   if x not in invalid_path_parts)
        if os.path.sep == '\\':
            # filter illegal characters on Windows
            arcname = self._sanitize_windows_name(arcname, os.path.sep)

        targetpath = os.path.join(targetpath, arcname)
        targetpath = os.path.normpath(targetpath)

        # Create all upper directories if necessary.
        upperdirs = os.path.dirname(targetpath)
        if upperdirs and not os.path.exists(upperdirs):
            os.makedirs(upperdirs)

        if member.filename[-1] == '/':
            if not os.path.isdir(targetpath):
                os.mkdir(targetpath)
            return targetpath

        with self.open(member, pwd=pwd) as source, \
             open(targetpath, "wb") as target:
            shutil.copyfileobj(source, target)

        return targetpath 

def printlist(x, width=70, indent=4):
    """Print the elements of iterable x to stdout.

    Optional arg width (default 70) is the maximum line length.
    Optional arg indent (default 4) is the number of blanks with which to
    begin each line.
    """

    from textwrap import fill
    blanks = ' ' * indent
    # Print the sorted list: 'x' may be a '--random' list or a set()
    print(fill(' '.join(str(elt) for elt in sorted(x)), width,
               initial_indent=blanks, subsequent_indent=blanks))

# Map sys.platform to a string containing the basenames of tests
# expected to be skipped on that platform.
#
# Special cases:
#     test_pep277
#         The _ExpectedSkips constructor adds this to the set of expected
#         skips if not os.path.supports_unicode_filenames.
#     test_timeout
#         Controlled by test_timeout.skip_expected.  Requires the network
#         resource and a socket module.
#
# Tests that are expected to be skipped everywhere except on one platform
# are also handled separately. 

def getexpected(self):
        """Return set of test names we expect to skip on current platform.

        self.isvalid() must be true.
        """

        assert self.isvalid()
        return self.expected 

def show_cursor():
	"""
	Turns the cursor back on in the terminal.
	"""

	if not sys.platform == 'win32':
		sys.stdout.write('\033[?25h')

	else:
		ci = ConsoleCursorInfo()
		handle = ctypes.windll.kernel32.GetStdHandle(-11)
		ctypes.windll.kernel32.GetConsoleCursorInfo(handle, ctypes.byref(ci))
		ci.visible = True
		ctypes.windll.kernel32.SetConsoleCursorInfo(handle, ctypes.byref(ci)) 

def shell_command(info: ScriptInfo) -> None:
    app = info.load_app()
    context = {}
    context.update(app.make_shell_context())

    banner = f"Python {sys.version} on {sys.platform} running {app.import_name}"
    code.interact(banner=banner, local=context) 

def try_find_libclang(toolchain_path: str = '', llvm_config=''):
    import sys
    from subprocess import check_output

    hint_paths = []

    if toolchain_path:
        libclang = os.path.join(toolchain_path, 'usr', 'lib', 'libclang.dylib')
        if os.path.isfile(libclang):
            print('Found libclang at: \'%s\'' % libclang)
            return libclang

    if not llvm_config:
        llvm_config = find_executable('llvm-config')
        if not llvm_config:
            print('WARNING: llvm-config not found')
            return ''
    elif not os.path.isfile(llvm_config):
        raise RuntimeError('Specified llvm-config file not found: \'%s\'' % llvm_config)

    llvm_libdir = check_output([llvm_config, '--libdir']).strip().decode('utf-8')
    if llvm_libdir:
        libsuffix = '.dylib' if sys.platform == 'darwin' else '.so'
        hints = ['libclang', 'clang']
        libclang = next((p for p in [os.path.join(llvm_libdir, h + libsuffix) for h in hints] if os.path.isfile(p)), '')
        if libclang:
            print('Found libclang at: \'%s\'' % libclang)
        return libclang

    return '' 

def requires_mac_ver(*min_version):
    """Decorator raising SkipTest if the OS is Mac OS X and the OS X
    version if less than min_version.

    For example, @requires_mac_ver(10, 5) raises SkipTest if the OS X version
    is lesser than 10.5.
    """
    def decorator(func):
        @functools.wraps(func)
        def wrapper(*args, **kw):
            if sys.platform == 'darwin':
                version_txt = platform.mac_ver()[0]
                try:
                    version = tuple(map(int, version_txt.split('.')))
                except ValueError:
                    pass
                else:
                    if version < min_version:
                        min_version_txt = '.'.join(map(str, min_version))
                        raise unittest.SkipTest(
                            "Mac OS X %s or higher required, not %s"
                            % (min_version_txt, version_txt))
            return func(*args, **kw)
        wrapper.min_version = min_version
        return wrapper
    return decorator 

def check_impl_detail(**guards):
    """This function returns True or False depending on the host platform.
       Examples:
          if check_impl_detail():               # only on CPython (default)
          if check_impl_detail(jython=True):    # only on Jython
          if check_impl_detail(cpython=False):  # everywhere except on CPython
    """
    guards, default = _parse_guards(guards)
    return guards.get(platform.python_implementation().lower(), default) 

def do_vcs_install(manifest_in, versionfile_source, ipy):
    """Git-specific installation logic for Versioneer.

    For Git, this means creating/changing .gitattributes to mark _version.py
    for export-subst keyword substitution.
    """
    GITS = ["git"]
    if sys.platform == "win32":
        GITS = ["git.cmd", "git.exe"]
    files = [manifest_in, versionfile_source]
    if ipy:
        files.append(ipy)
    try:
        me = __file__
        if me.endswith(".pyc") or me.endswith(".pyo"):
            me = os.path.splitext(me)[0] + ".py"
        versioneer_file = os.path.relpath(me)
    except NameError:
        versioneer_file = "versioneer.py"
    files.append(versioneer_file)
    present = False
    try:
        f = open(".gitattributes", "r")
        for line in f.readlines():
            if line.strip().startswith(versionfile_source):
                if "export-subst" in line.strip().split()[1:]:
                    present = True
        f.close()
    except EnvironmentError:
        pass
    if not present:
        f = open(".gitattributes", "a+")
        f.write("%s export-subst\n" % versionfile_source)
        f.close()
        files.append(".gitattributes")
    run_command(GITS, ["add", "--"] + files)