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Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2022-03-20 10:37
asyncio	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
collections	[ DIR ]	drwxrwxrwx	2022-03-20 10:35
concurrent	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
config-3.5m-x86_64-linux-gnu	[ DIR ]	drwxr-xr-x	2025-04-10 17:07
ctypes	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
curses	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
dbm	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
distutils	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
email	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
encodings	[ DIR ]	drwxrwxrwx	2022-03-20 10:35
html	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
http	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
idlelib	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
importlib	[ DIR ]	drwxrwxrwx	2022-03-20 10:35
json	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
lib-dynload	[ DIR ]	drwxrwxrwx	2022-03-20 10:35
lib2to3	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
logging	[ DIR ]	drwxrwxrwx	2022-03-20 10:35
multiprocessing	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
plat-x86_64-linux-gnu	[ DIR ]	drwxrwxrwx	2022-03-20 10:35
pydoc_data	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
sqlite3	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
test	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
tkinter	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
unittest	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
urllib	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
venv	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
wsgiref	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
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xmlrpc	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
LICENSE.txt	12.47 KB	-rw-r--r--	2021-11-04 16:29
__future__.py	4.73 KB	-rw-r--r--	2021-11-04 16:29
__phello__.foo.py	64 B	-rw-r--r--	2021-11-04 16:29
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abc.py	8.43 KB	-rw-r--r--	2021-11-04 16:29
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argparse.py	88.21 KB	-rw-r--r--	2021-11-04 16:29
ast.py	11.72 KB	-rw-r--r--	2021-11-04 16:29
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calendar.py	22.46 KB	-rw-r--r--	2021-11-04 16:29
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colorsys.py	3.97 KB	-rw-r--r--	2021-11-04 16:29
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configparser.py	52.2 KB	-rw-r--r--	2021-11-04 16:29
contextlib.py	12.11 KB	-rw-r--r--	2021-11-04 16:29
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datetime.py	74.12 KB	-rw-r--r--	2021-11-04 16:29
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dis.py	16.94 KB	-rw-r--r--	2021-11-04 16:29
doctest.py	101.6 KB	-rw-r--r--	2021-11-04 16:29
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enum.py	21.71 KB	-rw-r--r--	2021-11-04 16:29
filecmp.py	9.6 KB	-rw-r--r--	2021-11-04 16:29
fileinput.py	13.92 KB	-rw-r--r--	2021-11-04 16:29
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formatter.py	14.79 KB	-rw-r--r--	2021-11-04 16:29
fractions.py	24.04 KB	-rw-r--r--	2021-11-04 16:29
ftplib.py	34.01 KB	-rw-r--r--	2021-11-04 16:29
functools.py	28.27 KB	-rw-r--r--	2021-11-04 16:29
genericpath.py	4.26 KB	-rw-r--r--	2021-11-04 16:29
getopt.py	7.31 KB	-rw-r--r--	2021-11-04 16:29
getpass.py	5.91 KB	-rw-r--r--	2021-11-04 16:29
gettext.py	21.09 KB	-rw-r--r--	2021-11-04 16:29
glob.py	4.95 KB	-rw-r--r--	2021-11-04 16:29
gzip.py	19.79 KB	-rw-r--r--	2021-11-04 16:29
hashlib.py	7.79 KB	-rw-r--r--	2021-11-04 16:29
heapq.py	22.39 KB	-rw-r--r--	2021-11-04 16:29
hmac.py	4.94 KB	-rw-r--r--	2021-11-04 16:29
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imghdr.py	3.67 KB	-rw-r--r--	2021-11-04 16:29
imp.py	10.38 KB	-rw-r--r--	2021-11-04 16:29
inspect.py	110.78 KB	-rw-r--r--	2021-11-04 16:29
io.py	3.32 KB	-rw-r--r--	2021-11-04 16:29
ipaddress.py	73.83 KB	-rw-r--r--	2021-11-04 16:29
keyword.py	2.16 KB	-rwxr-xr-x	2021-11-04 16:29
linecache.py	5.19 KB	-rw-r--r--	2021-11-04 16:29
locale.py	72.97 KB	-rw-r--r--	2021-11-04 16:29
lzma.py	12.62 KB	-rw-r--r--	2021-11-04 16:29
macpath.py	5.77 KB	-rw-r--r--	2021-11-04 16:29
macurl2path.py	2.67 KB	-rw-r--r--	2021-11-04 16:29
mailbox.py	76.58 KB	-rw-r--r--	2021-11-04 16:29
mailcap.py	7.91 KB	-rw-r--r--	2021-11-04 16:29
mimetypes.py	20.36 KB	-rw-r--r--	2021-11-04 16:29
modulefinder.py	22.54 KB	-rw-r--r--	2021-11-04 16:29
netrc.py	5.61 KB	-rw-r--r--	2021-11-04 16:29
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ntpath.py	22.26 KB	-rw-r--r--	2021-11-04 16:29
nturl2path.py	2.39 KB	-rw-r--r--	2021-11-04 16:29
numbers.py	10 KB	-rw-r--r--	2021-11-04 16:29
opcode.py	5.75 KB	-rw-r--r--	2021-11-04 16:29
operator.py	10.61 KB	-rw-r--r--	2021-11-04 16:29
optparse.py	58.93 KB	-rw-r--r--	2021-11-04 16:29
os.py	36.08 KB	-rw-r--r--	2021-11-04 16:29
pathlib.py	45.89 KB	-rw-r--r--	2021-11-04 16:29
pdb.py	59.7 KB	-rwxr-xr-x	2021-11-04 16:29
pickle.py	54.86 KB	-rw-r--r--	2021-11-04 16:29
pickletools.py	89.61 KB	-rw-r--r--	2021-11-04 16:29
pipes.py	8.71 KB	-rw-r--r--	2021-11-04 16:29
pkgutil.py	20.66 KB	-rw-r--r--	2021-11-04 16:29
platform.py	45.96 KB	-rwxr-xr-x	2021-11-04 16:29
plistlib.py	30.73 KB	-rw-r--r--	2021-11-04 16:29
poplib.py	14.17 KB	-rw-r--r--	2021-11-04 16:29
posixpath.py	14.56 KB	-rw-r--r--	2021-11-04 16:29
pprint.py	20.37 KB	-rw-r--r--	2021-11-04 16:29
profile.py	21.5 KB	-rwxr-xr-x	2021-11-04 16:29
pstats.py	25.85 KB	-rw-r--r--	2021-11-04 16:29
pty.py	4.65 KB	-rw-r--r--	2021-11-04 16:29
py_compile.py	7.01 KB	-rw-r--r--	2021-11-04 16:29
pyclbr.py	13.25 KB	-rw-r--r--	2021-11-04 16:29
pydoc.py	100.44 KB	-rwxr-xr-x	2021-11-04 16:29
queue.py	8.57 KB	-rw-r--r--	2021-11-04 16:29
quopri.py	7.08 KB	-rwxr-xr-x	2021-11-04 16:29
random.py	25.84 KB	-rw-r--r--	2021-11-04 16:29
re.py	15.14 KB	-rw-r--r--	2021-11-04 16:29
reprlib.py	5.21 KB	-rw-r--r--	2021-11-04 16:29
rlcompleter.py	6.16 KB	-rw-r--r--	2021-11-04 16:29
runpy.py	11.68 KB	-rw-r--r--	2021-11-04 16:29
sched.py	6.07 KB	-rw-r--r--	2021-11-04 16:29
selectors.py	18.98 KB	-rw-r--r--	2021-11-04 16:29
shelve.py	8.33 KB	-rw-r--r--	2021-11-04 16:29
shlex.py	11.18 KB	-rw-r--r--	2021-11-04 16:29
shutil.py	39.11 KB	-rw-r--r--	2021-11-04 16:29
signal.py	2.07 KB	-rw-r--r--	2021-11-04 16:29
site.py	21.74 KB	-rw-r--r--	2021-11-04 16:29
sitecustomize.py	155 B	-rw-r--r--	2017-01-19 15:11
smtpd.py	34.53 KB	-rwxr-xr-x	2021-11-04 16:29
smtplib.py	42.57 KB	-rwxr-xr-x	2021-11-04 16:29
sndhdr.py	6.27 KB	-rw-r--r--	2021-11-04 16:29
socket.py	26.5 KB	-rw-r--r--	2021-11-04 16:29
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sre_compile.py	17.98 KB	-rw-r--r--	2021-11-04 16:29
sre_constants.py	6.3 KB	-rw-r--r--	2021-11-04 16:29
sre_parse.py	34.14 KB	-rw-r--r--	2021-11-04 16:29
ssl.py	41.36 KB	-rw-r--r--	2021-11-04 16:29
stat.py	4.92 KB	-rw-r--r--	2021-11-04 16:29
statistics.py	19.08 KB	-rw-r--r--	2021-11-04 16:29
string.py	11.58 KB	-rw-r--r--	2021-11-04 16:29
stringprep.py	12.61 KB	-rw-r--r--	2021-11-04 16:29
struct.py	257 B	-rw-r--r--	2021-11-04 16:29
subprocess.py	57.12 KB	-rw-r--r--	2021-11-04 16:29
sunau.py	17.67 KB	-rw-r--r--	2021-11-04 16:29
symbol.py	2.04 KB	-rwxr-xr-x	2021-11-04 16:29
symtable.py	7.02 KB	-rw-r--r--	2021-11-04 16:29
sysconfig.py	24.07 KB	-rw-r--r--	2021-11-04 16:29
tabnanny.py	11.13 KB	-rwxr-xr-x	2021-11-04 16:29
tarfile.py	90.96 KB	-rwxr-xr-x	2021-11-04 16:29
telnetlib.py	22.48 KB	-rw-r--r--	2021-11-04 16:29
tempfile.py	30.98 KB	-rw-r--r--	2021-11-04 16:29
textwrap.py	19.1 KB	-rw-r--r--	2021-11-04 16:29
this.py	1003 B	-rw-r--r--	2021-11-04 16:29
threading.py	47.77 KB	-rw-r--r--	2021-11-04 16:29
timeit.py	12.1 KB	-rwxr-xr-x	2021-11-04 16:29
token.py	3 KB	-rw-r--r--	2021-11-04 16:29
tokenize.py	27.14 KB	-rw-r--r--	2021-11-04 16:29
trace.py	30.8 KB	-rwxr-xr-x	2021-11-04 16:29
traceback.py	21.66 KB	-rw-r--r--	2021-11-04 16:29
tracemalloc.py	15.27 KB	-rw-r--r--	2021-11-04 16:29
tty.py	879 B	-rw-r--r--	2021-11-04 16:29
turtle.py	140.25 KB	-rw-r--r--	2021-11-04 16:29
types.py	8.59 KB	-rw-r--r--	2021-11-04 16:29
typing.py	69.02 KB	-rw-r--r--	2021-11-04 16:29
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uuid.py	22.72 KB	-rw-r--r--	2021-11-04 16:29
warnings.py	15.48 KB	-rw-r--r--	2021-11-04 16:29
wave.py	17.27 KB	-rw-r--r--	2021-11-04 16:29
weakref.py	19.95 KB	-rw-r--r--	2021-11-04 16:29
webbrowser.py	21.3 KB	-rwxr-xr-x	2021-11-04 16:29
xdrlib.py	5.77 KB	-rw-r--r--	2021-11-04 16:29
zipapp.py	6.99 KB	-rw-r--r--	2021-11-04 16:29
zipfile.py	72.12 KB	-rw-r--r--	2021-11-04 16:29

Rename

"""Utilities for with-statement contexts.  See PEP 343."""

import sys
from collections import deque
from functools import wraps

__all__ = ["contextmanager", "closing", "ContextDecorator", "ExitStack",
           "redirect_stdout", "redirect_stderr", "suppress"]

class ContextDecorator(object):
    "A base class or mixin that enables context managers to work as decorators."

def _recreate_cm(self):
        """Return a recreated instance of self.

Allows an otherwise one-shot context manager like
        _GeneratorContextManager to support use as
        a decorator via implicit recreation.

This is a private interface just for _GeneratorContextManager.
        See issue #11647 for details.
        """
        return self

def __call__(self, func):
        @wraps(func)
        def inner(*args, **kwds):
            with self._recreate_cm():
                return func(*args, **kwds)
        return inner

class _GeneratorContextManager(ContextDecorator):
    """Helper for @contextmanager decorator."""

def __init__(self, func, args, kwds):
        self.gen = func(*args, **kwds)
        self.func, self.args, self.kwds = func, args, kwds
        # Issue 19330: ensure context manager instances have good docstrings
        doc = getattr(func, "__doc__", None)
        if doc is None:
            doc = type(self).__doc__
        self.__doc__ = doc
        # Unfortunately, this still doesn't provide good help output when
        # inspecting the created context manager instances, since pydoc
        # currently bypasses the instance docstring and shows the docstring
        # for the class instead.
        # See http://bugs.python.org/issue19404 for more details.

def _recreate_cm(self):
        # _GCM instances are one-shot context managers, so the
        # CM must be recreated each time a decorated function is
        # called
        return self.__class__(self.func, self.args, self.kwds)

def __enter__(self):
        try:
            return next(self.gen)
        except StopIteration:
            raise RuntimeError("generator didn't yield") from None

def __exit__(self, type, value, traceback):
        if type is None:
            try:
                next(self.gen)
            except StopIteration:
                return
            else:
                raise RuntimeError("generator didn't stop")
        else:
            if value is None:
                # Need to force instantiation so we can reliably
                # tell if we get the same exception back
                value = type()
            try:
                self.gen.throw(type, value, traceback)
                raise RuntimeError("generator didn't stop after throw()")
            except StopIteration as exc:
                # Suppress StopIteration *unless* it's the same exception that
                # was passed to throw().  This prevents a StopIteration
                # raised inside the "with" statement from being suppressed.
                return exc is not value
            except RuntimeError as exc:
                # Don't re-raise the passed in exception. (issue27112)
                if exc is value:
                    return False
                # Likewise, avoid suppressing if a StopIteration exception
                # was passed to throw() and later wrapped into a RuntimeError
                # (see PEP 479).
                if exc.__cause__ is value:
                    return False
                raise
            except:
                # only re-raise if it's *not* the exception that was
                # passed to throw(), because __exit__() must not raise
                # an exception unless __exit__() itself failed.  But throw()
                # has to raise the exception to signal propagation, so this
                # fixes the impedance mismatch between the throw() protocol
                # and the __exit__() protocol.
                #
                if sys.exc_info()[1] is not value:
                    raise

def contextmanager(func):
    """@contextmanager decorator.

Typical usage:

@contextmanager
        def some_generator(<arguments>):
            <setup>
            try:
                yield <value>
            finally:
                <cleanup>

This makes this:

with some_generator(<arguments>) as <variable>:
            <body>

equivalent to this:

<setup>
        try:
            <variable> = <value>
            <body>
        finally:
            <cleanup>

"""
    @wraps(func)
    def helper(*args, **kwds):
        return _GeneratorContextManager(func, args, kwds)
    return helper

class closing(object):
    """Context to automatically close something at the end of a block.

Code like this:

with closing(<module>.open(<arguments>)) as f:
            <block>

is equivalent to this:

f = <module>.open(<arguments>)
        try:
            <block>
        finally:
            f.close()

"""
    def __init__(self, thing):
        self.thing = thing
    def __enter__(self):
        return self.thing
    def __exit__(self, *exc_info):
        self.thing.close()

class _RedirectStream:

_stream = None

def __init__(self, new_target):
        self._new_target = new_target
        # We use a list of old targets to make this CM re-entrant
        self._old_targets = []

def __enter__(self):
        self._old_targets.append(getattr(sys, self._stream))
        setattr(sys, self._stream, self._new_target)
        return self._new_target

def __exit__(self, exctype, excinst, exctb):
        setattr(sys, self._stream, self._old_targets.pop())

class redirect_stdout(_RedirectStream):
    """Context manager for temporarily redirecting stdout to another file.

# How to send help() to stderr
        with redirect_stdout(sys.stderr):
            help(dir)

# How to write help() to a file
        with open('help.txt', 'w') as f:
            with redirect_stdout(f):
                help(pow)
    """

_stream = "stdout"

class redirect_stderr(_RedirectStream):
    """Context manager for temporarily redirecting stderr to another file."""

_stream = "stderr"

class suppress:
    """Context manager to suppress specified exceptions

After the exception is suppressed, execution proceeds with the next
    statement following the with statement.

with suppress(FileNotFoundError):
             os.remove(somefile)
         # Execution still resumes here if the file was already removed
    """

def __init__(self, *exceptions):
        self._exceptions = exceptions

def __enter__(self):
        pass

def __exit__(self, exctype, excinst, exctb):
        # Unlike isinstance and issubclass, CPython exception handling
        # currently only looks at the concrete type hierarchy (ignoring
        # the instance and subclass checking hooks). While Guido considers
        # that a bug rather than a feature, it's a fairly hard one to fix
        # due to various internal implementation details. suppress provides
        # the simpler issubclass based semantics, rather than trying to
        # exactly reproduce the limitations of the CPython interpreter.
        #
        # See http://bugs.python.org/issue12029 for more details
        return exctype is not None and issubclass(exctype, self._exceptions)

# Inspired by discussions on http://bugs.python.org/issue13585
class ExitStack(object):
    """Context manager for dynamic management of a stack of exit callbacks

For example:

with ExitStack() as stack:
            files = [stack.enter_context(open(fname)) for fname in filenames]
            # All opened files will automatically be closed at the end of
            # the with statement, even if attempts to open files later
            # in the list raise an exception

"""
    def __init__(self):
        self._exit_callbacks = deque()

def pop_all(self):
        """Preserve the context stack by transferring it to a new instance"""
        new_stack = type(self)()
        new_stack._exit_callbacks = self._exit_callbacks
        self._exit_callbacks = deque()
        return new_stack

def _push_cm_exit(self, cm, cm_exit):
        """Helper to correctly register callbacks to __exit__ methods"""
        def _exit_wrapper(*exc_details):
            return cm_exit(cm, *exc_details)
        _exit_wrapper.__self__ = cm
        self.push(_exit_wrapper)

def push(self, exit):
        """Registers a callback with the standard __exit__ method signature

Can suppress exceptions the same way __exit__ methods can.

Also accepts any object with an __exit__ method (registering a call
        to the method instead of the object itself)
        """
        # We use an unbound method rather than a bound method to follow
        # the standard lookup behaviour for special methods
        _cb_type = type(exit)
        try:
            exit_method = _cb_type.__exit__
        except AttributeError:
            # Not a context manager, so assume its a callable
            self._exit_callbacks.append(exit)
        else:
            self._push_cm_exit(exit, exit_method)
        return exit # Allow use as a decorator

def callback(self, callback, *args, **kwds):
        """Registers an arbitrary callback and arguments.

Cannot suppress exceptions.
        """
        def _exit_wrapper(exc_type, exc, tb):
            callback(*args, **kwds)
        # We changed the signature, so using @wraps is not appropriate, but
        # setting __wrapped__ may still help with introspection
        _exit_wrapper.__wrapped__ = callback
        self.push(_exit_wrapper)
        return callback # Allow use as a decorator

def enter_context(self, cm):
        """Enters the supplied context manager

If successful, also pushes its __exit__ method as a callback and
        returns the result of the __enter__ method.
        """
        # We look up the special methods on the type to match the with statement
        _cm_type = type(cm)
        _exit = _cm_type.__exit__
        result = _cm_type.__enter__(cm)
        self._push_cm_exit(cm, _exit)
        return result

def close(self):
        """Immediately unwind the context stack"""
        self.__exit__(None, None, None)

def __enter__(self):
        return self

def __exit__(self, *exc_details):
        received_exc = exc_details[0] is not None

# We manipulate the exception state so it behaves as though
        # we were actually nesting multiple with statements
        frame_exc = sys.exc_info()[1]
        def _fix_exception_context(new_exc, old_exc):
            # Context may not be correct, so find the end of the chain
            while 1:
                exc_context = new_exc.__context__
                if exc_context is old_exc:
                    # Context is already set correctly (see issue 20317)
                    return
                if exc_context is None or exc_context is frame_exc:
                    break
                new_exc = exc_context
            # Change the end of the chain to point to the exception
            # we expect it to reference
            new_exc.__context__ = old_exc

# Callbacks are invoked in LIFO order to match the behaviour of
        # nested context managers
        suppressed_exc = False
        pending_raise = False
        while self._exit_callbacks:
            cb = self._exit_callbacks.pop()
            try:
                if cb(*exc_details):
                    suppressed_exc = True
                    pending_raise = False
                    exc_details = (None, None, None)
            except:
                new_exc_details = sys.exc_info()
                # simulate the stack of exceptions by setting the context
                _fix_exception_context(new_exc_details[1], exc_details[1])
                pending_raise = True
                exc_details = new_exc_details
        if pending_raise:
            try:
                # bare "raise exc_details[1]" replaces our carefully
                # set-up context
                fixed_ctx = exc_details[1].__context__
                raise exc_details[1]
            except BaseException:
                exc_details[1].__context__ = fixed_ctx
                raise
        return received_exc and suppressed_exc