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.venv/Lib/site-packages/passlib/utils/compat/__init__.py Normal file
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"""passlib.utils.compat - python 2/3 compatibility helpers"""
#=============================================================================
# figure out what we're running
#=============================================================================
#------------------------------------------------------------------------
# python version
#------------------------------------------------------------------------
import sys
PY2 = sys.version_info < (3,0)
PY3 = sys.version_info >= (3,0)
# make sure it's not an unsupported version, even if we somehow got this far
if sys.version_info < (2,6) or (3,0) <= sys.version_info < (3,2):
raise RuntimeError("Passlib requires Python 2.6, 2.7, or >= 3.2 (as of passlib 1.7)")
PY26 = sys.version_info < (2,7)
#------------------------------------------------------------------------
# python implementation
#------------------------------------------------------------------------
JYTHON = sys.platform.startswith('java')
PYPY = hasattr(sys, "pypy_version_info")
if PYPY and sys.pypy_version_info < (2,0):
raise RuntimeError("passlib requires pypy >= 2.0 (as of passlib 1.7)")
# e.g. '2.7.7\n[Pyston 0.5.1]'
# NOTE: deprecated support 2019-11
PYSTON = "Pyston" in sys.version
#=============================================================================
# common imports
#=============================================================================
import logging; log = logging.getLogger(__name__)
if PY3:
import builtins
else:
import __builtin__ as builtins
def add_doc(obj, doc):
"""add docstring to an object"""
obj.__doc__ = doc
#=============================================================================
# the default exported vars
#=============================================================================
__all__ = [
# python versions
'PY2', 'PY3', 'PY26',
# io
'BytesIO', 'StringIO', 'NativeStringIO', 'SafeConfigParser',
'print_',
# type detection
## 'is_mapping',
'int_types',
'num_types',
'unicode_or_bytes_types',
'native_string_types',
# unicode/bytes types & helpers
'u',
'unicode',
'uascii_to_str', 'bascii_to_str',
'str_to_uascii', 'str_to_bascii',
'join_unicode', 'join_bytes',
'join_byte_values', 'join_byte_elems',
'byte_elem_value',
'iter_byte_values',
# iteration helpers
'irange', #'lrange',
'imap', 'lmap',
'iteritems', 'itervalues',
'next',
# collections
'OrderedDict',
# context helpers
'nullcontext',
# introspection
'get_method_function', 'add_doc',
]
# begin accumulating mapping of lazy-loaded attrs,
# 'merged' into module at bottom
_lazy_attrs = dict()
#=============================================================================
# unicode & bytes types
#=============================================================================
if PY3:
unicode = str
# TODO: once we drop python 3.2 support, can use u'' again!
def u(s):
assert isinstance(s, str)
return s
unicode_or_bytes_types = (str, bytes)
native_string_types = (unicode,)
else:
unicode = builtins.unicode
def u(s):
assert isinstance(s, str)
return s.decode("unicode_escape")
unicode_or_bytes_types = (basestring,)
native_string_types = (basestring,)
# shorter preferred aliases
unicode_or_bytes = unicode_or_bytes_types
unicode_or_str = native_string_types
# unicode -- unicode type, regardless of python version
# bytes -- bytes type, regardless of python version
# unicode_or_bytes_types -- types that text can occur in, whether encoded or not
# native_string_types -- types that native python strings (dict keys etc) can occur in.
#=============================================================================
# unicode & bytes helpers
#=============================================================================
# function to join list of unicode strings
join_unicode = u('').join
# function to join list of byte strings
join_bytes = b''.join
if PY3:
def uascii_to_str(s):
assert isinstance(s, unicode)
return s
def bascii_to_str(s):
assert isinstance(s, bytes)
return s.decode("ascii")
def str_to_uascii(s):
assert isinstance(s, str)
return s
def str_to_bascii(s):
assert isinstance(s, str)
return s.encode("ascii")
join_byte_values = join_byte_elems = bytes
def byte_elem_value(elem):
assert isinstance(elem, int)
return elem
def iter_byte_values(s):
assert isinstance(s, bytes)
return s
def iter_byte_chars(s):
assert isinstance(s, bytes)
# FIXME: there has to be a better way to do this
return (bytes([c]) for c in s)
else:
def uascii_to_str(s):
assert isinstance(s, unicode)
return s.encode("ascii")
def bascii_to_str(s):
assert isinstance(s, bytes)
return s
def str_to_uascii(s):
assert isinstance(s, str)
return s.decode("ascii")
def str_to_bascii(s):
assert isinstance(s, str)
return s
def join_byte_values(values):
return join_bytes(chr(v) for v in values)
join_byte_elems = join_bytes
byte_elem_value = ord
def iter_byte_values(s):
assert isinstance(s, bytes)
return (ord(c) for c in s)
def iter_byte_chars(s):
assert isinstance(s, bytes)
return s
add_doc(uascii_to_str, "helper to convert ascii unicode -> native str")
add_doc(bascii_to_str, "helper to convert ascii bytes -> native str")
add_doc(str_to_uascii, "helper to convert ascii native str -> unicode")
add_doc(str_to_bascii, "helper to convert ascii native str -> bytes")
# join_byte_values -- function to convert list of ordinal integers to byte string.
# join_byte_elems -- function to convert list of byte elements to byte string;
# i.e. what's returned by ``b('a')[0]``...
# this is b('a') under PY2, but 97 under PY3.
# byte_elem_value -- function to convert byte element to integer -- a noop under PY3
add_doc(iter_byte_values, "iterate over byte string as sequence of ints 0-255")
add_doc(iter_byte_chars, "iterate over byte string as sequence of 1-byte strings")
#=============================================================================
# numeric
#=============================================================================
if PY3:
int_types = (int,)
num_types = (int, float)
else:
int_types = (int, long)
num_types = (int, long, float)
#=============================================================================
# iteration helpers
#
# irange - range iterable / view (xrange under py2, range under py3)
# lrange - range list (range under py2, list(range()) under py3)
#
# imap - map to iterator
# lmap - map to list
#=============================================================================
if PY3:
irange = range
##def lrange(*a,**k):
## return list(range(*a,**k))
def lmap(*a, **k):
return list(map(*a,**k))
imap = map
def iteritems(d):
return d.items()
def itervalues(d):
return d.values()
def nextgetter(obj):
return obj.__next__
izip = zip
else:
irange = xrange
##lrange = range
lmap = map
from itertools import imap, izip
def iteritems(d):
return d.iteritems()
def itervalues(d):
return d.itervalues()
def nextgetter(obj):
return obj.next
add_doc(nextgetter, "return function that yields successive values from iterable")
#=============================================================================
# typing
#=============================================================================
##def is_mapping(obj):
## # non-exhaustive check, enough to distinguish from lists, etc
## return hasattr(obj, "items")
#=============================================================================
# introspection
#=============================================================================
if PY3:
method_function_attr = "__func__"
else:
method_function_attr = "im_func"
def get_method_function(func):
"""given (potential) method, return underlying function"""
return getattr(func, method_function_attr, func)
def get_unbound_method_function(func):
"""given unbound method, return underlying function"""
return func if PY3 else func.__func__
def error_from(exc, # *,
cause=None):
"""
backward compat hack to suppress exception cause in python3.3+
one python < 3.3 support is dropped, can replace all uses with "raise exc from None"
"""
exc.__cause__ = cause
exc.__suppress_context__ = True
return exc
# legacy alias
suppress_cause = error_from
#=============================================================================
# input/output
#=============================================================================
if PY3:
_lazy_attrs = dict(
BytesIO="io.BytesIO",
UnicodeIO="io.StringIO",
NativeStringIO="io.StringIO",
SafeConfigParser="configparser.ConfigParser",
)
print_ = getattr(builtins, "print")
else:
_lazy_attrs = dict(
BytesIO="cStringIO.StringIO",
UnicodeIO="StringIO.StringIO",
NativeStringIO="cStringIO.StringIO",
SafeConfigParser="ConfigParser.SafeConfigParser",
)
def print_(*args, **kwds):
"""The new-style print function."""
# extract kwd args
fp = kwds.pop("file", sys.stdout)
sep = kwds.pop("sep", None)
end = kwds.pop("end", None)
if kwds:
raise TypeError("invalid keyword arguments")
# short-circuit if no target
if fp is None:
return
# use unicode or bytes ?
want_unicode = isinstance(sep, unicode) or isinstance(end, unicode) or \
any(isinstance(arg, unicode) for arg in args)
# pick default end sequence
if end is None:
end = u("\n") if want_unicode else "\n"
elif not isinstance(end, unicode_or_bytes_types):
raise TypeError("end must be None or a string")
# pick default separator
if sep is None:
sep = u(" ") if want_unicode else " "
elif not isinstance(sep, unicode_or_bytes_types):
raise TypeError("sep must be None or a string")
# write to buffer
first = True
write = fp.write
for arg in args:
if first:
first = False
else:
write(sep)
if not isinstance(arg, basestring):
arg = str(arg)
write(arg)
write(end)
#=============================================================================
# collections
#=============================================================================
if PY26:
_lazy_attrs['OrderedDict'] = 'passlib.utils.compat._ordered_dict.OrderedDict'
else:
_lazy_attrs['OrderedDict'] = 'collections.OrderedDict'
#=============================================================================
# context managers
#=============================================================================
try:
# new in py37
from contextlib import nullcontext
except ImportError:
class nullcontext(object):
"""
Context manager that does no additional processing.
"""
def __init__(self, enter_result=None):
self.enter_result = enter_result
def __enter__(self):
return self.enter_result
def __exit__(self, *exc_info):
pass
#=============================================================================
# lazy overlay module
#=============================================================================
from types import ModuleType
def _import_object(source):
"""helper to import object from module; accept format `path.to.object`"""
modname, modattr = source.rsplit(".",1)
mod = __import__(modname, fromlist=[modattr], level=0)
return getattr(mod, modattr)
class _LazyOverlayModule(ModuleType):
"""proxy module which overlays original module,
and lazily imports specified attributes.
this is mainly used to prevent importing of resources
that are only needed by certain password hashes,
yet allow them to be imported from a single location.
used by :mod:`passlib.utils`, :mod:`passlib.crypto`,
and :mod:`passlib.utils.compat`.
"""
@classmethod
def replace_module(cls, name, attrmap):
orig = sys.modules[name]
self = cls(name, attrmap, orig)
sys.modules[name] = self
return self
def __init__(self, name, attrmap, proxy=None):
ModuleType.__init__(self, name)
self.__attrmap = attrmap
self.__proxy = proxy
self.__log = logging.getLogger(name)
def __getattr__(self, attr):
proxy = self.__proxy
if proxy and hasattr(proxy, attr):
return getattr(proxy, attr)
attrmap = self.__attrmap
if attr in attrmap:
source = attrmap[attr]
if callable(source):
value = source()
else:
value = _import_object(source)
setattr(self, attr, value)
self.__log.debug("loaded lazy attr %r: %r", attr, value)
return value
raise AttributeError("'module' object has no attribute '%s'" % (attr,))
def __repr__(self):
proxy = self.__proxy
if proxy:
return repr(proxy)
else:
return ModuleType.__repr__(self)
def __dir__(self):
attrs = set(dir(self.__class__))
attrs.update(self.__dict__)
attrs.update(self.__attrmap)
proxy = self.__proxy
if proxy is not None:
attrs.update(dir(proxy))
return list(attrs)
# replace this module with overlay that will lazily import attributes.
_LazyOverlayModule.replace_module(__name__, _lazy_attrs)
#=============================================================================
# eof
#=============================================================================

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.venv/Lib/site-packages/passlib/utils/compat/_ordered_dict.py Normal file
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"""passlib.utils.compat._ordered_dict -- backport of collections.OrderedDict for py26
taken from stdlib-suggested recipe at http://code.activestate.com/recipes/576693/
this should be imported from passlib.utils.compat.OrderedDict, not here.
"""
try:
from thread import get_ident as _get_ident
except ImportError:
from dummy_thread import get_ident as _get_ident
class OrderedDict(dict):
"""Dictionary that remembers insertion order"""
# An inherited dict maps keys to values.
# The inherited dict provides __getitem__, __len__, __contains__, and get.
# The remaining methods are order-aware.
# Big-O running times for all methods are the same as for regular dictionaries.
# The internal self.__map dictionary maps keys to links in a doubly linked list.
# The circular doubly linked list starts and ends with a sentinel element.
# The sentinel element never gets deleted (this simplifies the algorithm).
# Each link is stored as a list of length three: [PREV, NEXT, KEY].
def __init__(self, *args, **kwds):
'''Initialize an ordered dictionary. Signature is the same as for
regular dictionaries, but keyword arguments are not recommended
because their insertion order is arbitrary.
'''
if len(args) > 1:
raise TypeError('expected at most 1 arguments, got %d' % len(args))
try:
self.__root
except AttributeError:
self.__root = root = [] # sentinel node
root[:] = [root, root, None]
self.__map = {}
self.__update(*args, **kwds)
def __setitem__(self, key, value, dict_setitem=dict.__setitem__):
'od.__setitem__(i, y) <==> od[i]=y'
# Setting a new item creates a new link which goes at the end of the linked
# list, and the inherited dictionary is updated with the new key/value pair.
if key not in self:
root = self.__root
last = root[0]
last[1] = root[0] = self.__map[key] = [last, root, key]
dict_setitem(self, key, value)
def __delitem__(self, key, dict_delitem=dict.__delitem__):
'od.__delitem__(y) <==> del od[y]'
# Deleting an existing item uses self.__map to find the link which is
# then removed by updating the links in the predecessor and successor nodes.
dict_delitem(self, key)
link_prev, link_next, key = self.__map.pop(key)
link_prev[1] = link_next
link_next[0] = link_prev
def __iter__(self):
'od.__iter__() <==> iter(od)'
root = self.__root
curr = root[1]
while curr is not root:
yield curr[2]
curr = curr[1]
def __reversed__(self):
'od.__reversed__() <==> reversed(od)'
root = self.__root
curr = root[0]
while curr is not root:
yield curr[2]
curr = curr[0]
def clear(self):
'od.clear() -> None. Remove all items from od.'
try:
for node in self.__map.itervalues():
del node[:]
root = self.__root
root[:] = [root, root, None]
self.__map.clear()
except AttributeError:
pass
dict.clear(self)
def popitem(self, last=True):
'''od.popitem() -> (k, v), return and remove a (key, value) pair.
Pairs are returned in LIFO order if last is true or FIFO order if false.
'''
if not self:
raise KeyError('dictionary is empty')
root = self.__root
if last:
link = root[0]
link_prev = link[0]
link_prev[1] = root
root[0] = link_prev
else:
link = root[1]
link_next = link[1]
root[1] = link_next
link_next[0] = root
key = link[2]
del self.__map[key]
value = dict.pop(self, key)
return key, value
# -- the following methods do not depend on the internal structure --
def keys(self):
'od.keys() -> list of keys in od'
return list(self)
def values(self):
'od.values() -> list of values in od'
return [self[key] for key in self]
def items(self):
'od.items() -> list of (key, value) pairs in od'
return [(key, self[key]) for key in self]
def iterkeys(self):
'od.iterkeys() -> an iterator over the keys in od'
return iter(self)
def itervalues(self):
'od.itervalues -> an iterator over the values in od'
for k in self:
yield self[k]
def iteritems(self):
'od.iteritems -> an iterator over the (key, value) items in od'
for k in self:
yield (k, self[k])
def update(*args, **kwds):
'''od.update(E, **F) -> None. Update od from dict/iterable E and F.
If E is a dict instance, does: for k in E: od[k] = E[k]
If E has a .keys() method, does: for k in E.keys(): od[k] = E[k]
Or if E is an iterable of items, does: for k, v in E: od[k] = v
In either case, this is followed by: for k, v in F.items(): od[k] = v
'''
if len(args) > 2:
raise TypeError('update() takes at most 2 positional '
'arguments (%d given)' % (len(args),))
elif not args:
raise TypeError('update() takes at least 1 argument (0 given)')
self = args[0]
# Make progressively weaker assumptions about "other"
other = ()
if len(args) == 2:
other = args[1]
if isinstance(other, dict):
for key in other:
self[key] = other[key]
elif hasattr(other, 'keys'):
for key in other.keys():
self[key] = other[key]
else:
for key, value in other:
self[key] = value
for key, value in kwds.items():
self[key] = value
__update = update # let subclasses override update without breaking __init__
__marker = object()
def pop(self, key, default=__marker):
'''od.pop(k[,d]) -> v, remove specified key and return the corresponding value.
If key is not found, d is returned if given, otherwise KeyError is raised.
'''
if key in self:
result = self[key]
del self[key]
return result
if default is self.__marker:
raise KeyError(key)
return default
def setdefault(self, key, default=None):
'od.setdefault(k[,d]) -> od.get(k,d), also set od[k]=d if k not in od'
if key in self:
return self[key]
self[key] = default
return default
def __repr__(self, _repr_running={}):
'od.__repr__() <==> repr(od)'
call_key = id(self), _get_ident()
if call_key in _repr_running:
return '...'
_repr_running[call_key] = 1
try:
if not self:
return '%s()' % (self.__class__.__name__,)
return '%s(%r)' % (self.__class__.__name__, self.items())
finally:
del _repr_running[call_key]
def __reduce__(self):
'Return state information for pickling'
items = [[k, self[k]] for k in self]
inst_dict = vars(self).copy()
for k in vars(OrderedDict()):
inst_dict.pop(k, None)
if inst_dict:
return (self.__class__, (items,), inst_dict)
return self.__class__, (items,)
def copy(self):
'od.copy() -> a shallow copy of od'
return self.__class__(self)
@classmethod
def fromkeys(cls, iterable, value=None):
'''OD.fromkeys(S[, v]) -> New ordered dictionary with keys from S
and values equal to v (which defaults to None).
'''
d = cls()
for key in iterable:
d[key] = value
return d
def __eq__(self, other):
'''od.__eq__(y) <==> od==y. Comparison to another OD is order-sensitive
while comparison to a regular mapping is order-insensitive.
'''
if isinstance(other, OrderedDict):
return len(self)==len(other) and self.items() == other.items()
return dict.__eq__(self, other)
def __ne__(self, other):
return not self == other