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bazarr/libs/ffmpeg/_utils.py

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from __future__ import unicode_literals
from builtins import str
from past.builtins import basestring
import hashlib
import sys
if sys.version_info.major == 2:
# noinspection PyUnresolvedReferences,PyShadowingBuiltins
str = str
# `past.builtins.basestring` module can't be imported on Python3 in some environments (Ubuntu).
# This code is copy-pasted from it to avoid crashes.
class BaseBaseString(type):
def __instancecheck__(cls, instance):
return isinstance(instance, (bytes, str))
def __subclasshook__(cls, thing):
# TODO: What should go here?
raise NotImplemented
def with_metaclass(meta, *bases):
class metaclass(meta):
__call__ = type.__call__
__init__ = type.__init__
def __new__(cls, name, this_bases, d):
if this_bases is None:
return type.__new__(cls, name, (), d)
return meta(name, bases, d)
return metaclass('temporary_class', None, {})
if sys.version_info.major >= 3:
class basestring(with_metaclass(BaseBaseString)):
pass
else:
# noinspection PyUnresolvedReferences,PyCompatibility
from builtins import basestring
def _recursive_repr(item):
"""Hack around python `repr` to deterministically represent dictionaries.
This is able to represent more things than json.dumps, since it does not require things to be JSON serializable
(e.g. datetimes).
"""
if isinstance(item, basestring):
result = str(item)
elif isinstance(item, list):
result = '[{}]'.format(', '.join([_recursive_repr(x) for x in item]))
elif isinstance(item, dict):
kv_pairs = [
'{}: {}'.format(_recursive_repr(k), _recursive_repr(item[k]))
for k in sorted(item)
]
result = '{' + ', '.join(kv_pairs) + '}'
else:
result = repr(item)
return result
def get_hash(item):
repr_ = _recursive_repr(item).encode('utf-8')
return hashlib.md5(repr_).hexdigest()
def get_hash_int(item):
return int(get_hash(item), base=16)
def escape_chars(text, chars):
"""Helper function to escape uncomfortable characters."""
text = str(text)
chars = list(set(chars))
if '\\' in chars:
chars.remove('\\')
chars.insert(0, '\\')
for ch in chars:
text = text.replace(ch, '\\' + ch)
return text
def convert_kwargs_to_cmd_line_args(kwargs):
"""Helper function to build command line arguments out of dict."""
args = []
for k in sorted(kwargs.keys()):
v = kwargs[k]
args.append('-{}'.format(k))
if v is not None:
args.append('{}'.format(v))
return args