Python utils.PY3属性代码示例

# 需要导入模块: from future import utils [as 别名]
# 或者: from future.utils import PY3 [as 别名]
def scrub_py2_sys_modules():
    """
    Removes any Python 2 standard library modules from ``sys.modules`` that
    would interfere with Py3-style imports using import hooks. Examples are
    modules with the same names (like urllib or email).

    (Note that currently import hooks are disabled for modules like these
    with ambiguous names anyway ...)
    """
    if PY3:
        return {}
    scrubbed = {}
    for modulename in REPLACED_MODULES & set(RENAMES.keys()):
        if not modulename in sys.modules:
            continue

        module = sys.modules[modulename]

        if is_py2_stdlib_module(module):
            flog.debug('Deleting (Py2) {} from sys.modules'.format(modulename))
            scrubbed[modulename] = sys.modules[modulename]
            del sys.modules[modulename]
    return scrubbed 

# 需要导入模块: from future import utils [as 别名]
# 或者: from future.utils import PY3 [as 别名]
def install_hooks():
    """
    This function installs the future.standard_library import hook into
    sys.meta_path.
    """
    if PY3:
        return

    install_aliases()

    flog.debug('sys.meta_path was: {0}'.format(sys.meta_path))
    flog.debug('Installing hooks ...')

    # Add it unless it's there already
    newhook = RenameImport(RENAMES)
    if not detect_hooks():
        sys.meta_path.append(newhook)
    flog.debug('sys.meta_path is now: {0}'.format(sys.meta_path)) 

# 需要导入模块: from future import utils [as 别名]
# 或者: from future.utils import PY3 [as 别名]
def remove_hooks(scrub_sys_modules=False):
    """
    This function removes the import hook from sys.meta_path.
    """
    if PY3:
        return
    flog.debug('Uninstalling hooks ...')
    # Loop backwards, so deleting items keeps the ordering:
    for i, hook in list(enumerate(sys.meta_path))[::-1]:
        if hasattr(hook, 'RENAMER'):
            del sys.meta_path[i]

    # Explicit is better than implicit. In the future the interface should
    # probably change so that scrubbing the import hooks requires a separate
    # function call. Left as is for now for backward compatibility with
    # v0.11.x.
    if scrub_sys_modules:
        scrub_future_sys_modules() 

# 需要导入模块: from future import utils [as 别名]
# 或者: from future.utils import PY3 [as 别名]
def detect_hooks():
    """
    Returns True if the import hooks are installed, False if not.
    """
    flog.debug('Detecting hooks ...')
    present = any([hasattr(hook, 'RENAMER') for hook in sys.meta_path])
    if present:
        flog.debug('Detected.')
    else:
        flog.debug('Not detected.')
    return present


# As of v0.12, this no longer happens implicitly:
# if not PY3:
#     install_hooks() 

# 需要导入模块: from future import utils [as 别名]
# 或者: from future.utils import PY3 [as 别名]
def test_setdefault_atomic(self):
        # Issue #13521: setdefault() calls __hash__ and __eq__ only once.
        class Hashed(object):
            def __init__(self):
                self.hash_count = 0
                self.eq_count = 0
            def __hash__(self):
                self.hash_count += 1
                return 42
            def __eq__(self, other):
                self.eq_count += 1
                return id(self) == id(other)
        hashed1 = Hashed()
        y = dict({hashed1: 5})
        hashed2 = Hashed()
        y.setdefault(hashed2, [])
        self.assertEqual(hashed1.hash_count, 1)
        if PY3:
            self.assertEqual(hashed2.hash_count, 1)
            self.assertEqual(hashed1.eq_count + hashed2.eq_count, 1) 

# 需要导入模块: from future import utils [as 别名]
# 或者: from future.utils import PY3 [as 别名]
def sendall(self, data):
        # self.data += bytes(data)
        olddata = self.data
        assert isinstance(olddata, bytes)
        if utils.PY3:
            self.data += data
        else:
            if isinstance(data, type(u'')):     # i.e. unicode
                newdata = data.encode('ascii')
            elif isinstance(data, type(b'')):   # native string type. FIXME!
                newdata = bytes(data)
            elif isinstance(data, bytes):
                newdata = data
            elif isinstance(data, array.array):
                newdata = data.tostring()
            else:
                newdata = bytes(b'').join(chr(d) for d in bytes(data))
            self.data += newdata 

# 需要导入模块: from future import utils [as 别名]
# 或者: from future.utils import PY3 [as 别名]
def test_send(self):
        expected = bytes(b'this is a test this is only a test')
        conn = client.HTTPConnection('example.com')
        sock = FakeSocket(None)
        conn.sock = sock
        conn.send(expected)
        self.assertEqual(expected, sock.data)
        sock.data = bytes(b'')
        if utils.PY3:
            mydata = array.array('b', expected)
        else:
            mydata = array.array(b'b', expected)
        conn.send(mydata)
        self.assertEqual(expected, sock.data)
        sock.data = bytes(b'')
        conn.send(io.BytesIO(expected))
        self.assertEqual(expected, sock.data) 

# 需要导入模块: from future import utils [as 别名]
# 或者: from future.utils import PY3 [as 别名]
def is_py2_stdlib_module(m):
    """
    Tries to infer whether the module m is from the Python 2 standard library.
    This may not be reliable on all systems.
    """
    if PY3:
        return False
    if not 'stdlib_path' in is_py2_stdlib_module.__dict__:
        stdlib_files = [contextlib.__file__, os.__file__, copy.__file__]
        stdlib_paths = [os.path.split(f)[0] for f in stdlib_files]
        if not len(set(stdlib_paths)) == 1:
            # This seems to happen on travis-ci.org. Very strange. We'll try to
            # ignore it.
            flog.warn('Multiple locations found for the Python standard '
                         'library: %s' % stdlib_paths)
        # Choose the first one arbitrarily
        is_py2_stdlib_module.stdlib_path = stdlib_paths[0]

    if m.__name__ in sys.builtin_module_names:
        return True

    if hasattr(m, '__file__'):
        modpath = os.path.split(m.__file__)
        if (modpath[0].startswith(is_py2_stdlib_module.stdlib_path) and
            'site-packages' not in modpath[0]):
            return True

    return False 

# 需要导入模块: from future import utils [as 别名]
# 或者: from future.utils import PY3 [as 别名]
def u(text):
    if utils.PY3:
        return text
    else:
        return text.decode('unicode_escape') 

# 需要导入模块: from future import utils [as 别名]
# 或者: from future.utils import PY3 [as 别名]
def b(data):
    if utils.PY3:
        return data.encode('latin1')
    else:
        return data