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C菌
@@ -0,0 +1,328 @@
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"""
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General helpers required for `tqdm.std`.
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"""
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import os
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import re
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import sys
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from functools import partial, partialmethod, wraps
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from inspect import signature
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# TODO consider using wcswidth third-party package for 0-width characters
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from unicodedata import east_asian_width
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from warnings import warn
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from weakref import proxy
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_range, _unich, _unicode, _basestring = range, chr, str, str
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CUR_OS = sys.platform
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IS_WIN = any(CUR_OS.startswith(i) for i in ['win32', 'cygwin'])
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IS_NIX = any(CUR_OS.startswith(i) for i in ['aix', 'linux', 'darwin', 'freebsd'])
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RE_ANSI = re.compile(r"\x1b\[[;\d]*[A-Za-z]")
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try:
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if IS_WIN:
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import colorama
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else:
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raise ImportError
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except ImportError:
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colorama = None
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else:
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try:
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colorama.init(strip=False)
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except TypeError:
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colorama.init()
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def envwrap(name, app="", types=None, is_method=False):
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"""
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Basic (env-only) version of [envwrap](https://github.com/tqdm/envwrap).
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Install `envwrap` for config file support.
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"""
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if types is None:
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types = {}
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if name[-1] == "_":
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name = name[:-1]
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warn("Trailing underscore in `name` is automatic", DeprecationWarning, stacklevel=2)
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prefixes = (name, f"{name}_{app}") if app else (name,)
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env_overrides = {}
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for prefix in prefixes:
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prefix = prefix.upper() + "_"
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i = len(prefix)
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env_overrides.update(
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(k[i:].lower(), v) for k, v in os.environ.items() if k.startswith(prefix))
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part = partialmethod if is_method else partial
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def wrap(func):
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params = signature(func).parameters
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# ignore unknown env vars
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overrides = {k: v for k, v in env_overrides.items() if k in params}
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# infer overrides' `type`s
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for k in overrides:
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param = params[k]
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if param.annotation is not param.empty: # typehints
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for typ in getattr(param.annotation, '__args__', (param.annotation,)):
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try:
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overrides[k] = typ(overrides[k])
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except Exception: # nosec B110
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pass
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else:
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break
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elif param.default is not None: # type of default value
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overrides[k] = type(param.default)(overrides[k])
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else:
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try: # `types` fallback
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overrides[k] = types[k](overrides[k])
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except KeyError: # keep unconverted (`str`)
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pass
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return part(func, **overrides)
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return wrap
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try:
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from envwrap import envwrap # noqa: F401, F811, pylint: disable=unused-import
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except ModuleNotFoundError:
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pass
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class FormatReplace:
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"""
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>>> a = FormatReplace('something')
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>>> f"{a:5d}"
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'something'
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""" # NOQA: P102
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def __init__(self, replace=''):
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self.replace = replace
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self.format_called = 0
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def __format__(self, _):
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self.format_called += 1
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return self.replace
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class Comparable:
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"""Assumes child has self._comparable attr/@property"""
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def __lt__(self, other):
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return self._comparable < other._comparable
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def __le__(self, other):
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return (self < other) or (self == other)
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def __eq__(self, other):
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return self._comparable == other._comparable
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def __ne__(self, other):
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return not self == other
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def __gt__(self, other):
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return not self <= other
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def __ge__(self, other):
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return not self < other
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class ObjectWrapper:
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def __getattr__(self, name):
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return getattr(self._wrapped, name)
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def __setattr__(self, name, value):
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return setattr(self._wrapped, name, value)
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def wrapper_getattr(self, name):
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"""Actual `self.getattr` rather than self._wrapped.getattr"""
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try:
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return object.__getattr__(self, name)
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except AttributeError: # py2
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return getattr(self, name)
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def wrapper_setattr(self, name, value):
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"""Actual `self.setattr` rather than self._wrapped.setattr"""
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return object.__setattr__(self, name, value)
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def __init__(self, wrapped):
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"""
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Thin wrapper around a given object
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"""
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self.wrapper_setattr('_wrapped', wrapped)
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class SimpleTextIOWrapper(ObjectWrapper):
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"""
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Change only `.write()` of the wrapped object by encoding the passed
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value and passing the result to the wrapped object's `.write()` method.
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"""
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# pylint: disable=too-few-public-methods
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def __init__(self, wrapped, encoding):
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super().__init__(wrapped)
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self.wrapper_setattr('encoding', encoding)
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def write(self, s):
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"""
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Encode `s` and pass to the wrapped object's `.write()` method.
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"""
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return self._wrapped.write(s.encode(self.wrapper_getattr('encoding')))
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def __eq__(self, other):
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return self._wrapped == getattr(other, '_wrapped', other)
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class DisableOnWriteError(ObjectWrapper):
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"""
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Disable the given `tqdm_instance` upon `write()` or `flush()` errors.
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"""
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@staticmethod
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def disable_on_exception(tqdm_instance, func):
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"""
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Quietly set `tqdm_instance.miniters=inf` if `func` raises `errno=5`.
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"""
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tqdm_instance = proxy(tqdm_instance)
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def inner(*args, **kwargs):
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try:
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return func(*args, **kwargs)
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except OSError as e:
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if e.errno != 5:
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raise
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try:
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tqdm_instance.miniters = float('inf')
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except ReferenceError:
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pass
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except ValueError as e:
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if 'closed' not in str(e):
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raise
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try:
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tqdm_instance.miniters = float('inf')
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except ReferenceError:
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pass
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return inner
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def __init__(self, wrapped, tqdm_instance): # noqa: B042
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super().__init__(wrapped)
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if hasattr(wrapped, 'write'):
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self.wrapper_setattr(
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'write', self.disable_on_exception(tqdm_instance, wrapped.write))
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if hasattr(wrapped, 'flush'):
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self.wrapper_setattr(
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'flush', self.disable_on_exception(tqdm_instance, wrapped.flush))
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def __eq__(self, other):
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return self._wrapped == getattr(other, '_wrapped', other)
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class CallbackIOWrapper(ObjectWrapper):
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def __init__(self, callback, stream, method="read"):
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"""
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Wrap a given `file`-like object's `read()` or `write()` to report
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lengths to the given `callback`
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"""
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super().__init__(stream)
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func = getattr(stream, method)
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if method == "write":
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@wraps(func)
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def write(data, *args, **kwargs):
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res = func(data, *args, **kwargs)
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callback(len(data))
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return res
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self.wrapper_setattr('write', write)
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elif method == "read":
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@wraps(func)
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def read(*args, **kwargs):
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data = func(*args, **kwargs)
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callback(len(data))
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return data
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self.wrapper_setattr('read', read)
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else:
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raise KeyError("Can only wrap read/write methods")
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def _is_utf(encoding):
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try:
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'\u2588\u2589'.encode(encoding)
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except UnicodeEncodeError:
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return False
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except Exception:
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try:
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return encoding.lower().startswith('utf-') or ('U8' == encoding)
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except Exception:
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return False
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else:
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return True
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def _supports_unicode(fp):
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try:
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return _is_utf(fp.encoding)
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except AttributeError:
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return False
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def _is_ascii(s):
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if isinstance(s, str):
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for c in s:
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if ord(c) > 255:
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return False
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return True
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return _supports_unicode(s)
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def _screen_shape_wrapper(): # pragma: no cover
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"""
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Return a function which returns console dimensions (width, height).
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Supported: linux, osx, windows, cygwin.
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"""
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def inner(fp):
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try:
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from os import get_terminal_size
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cols, lines = get_terminal_size(getattr(fp, 'fileno', lambda: None)())
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return cols - 1, lines - 1
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except Exception:
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return None, None
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return inner
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def _environ_cols_wrapper(): # pragma: no cover
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"""
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Return a function which returns console width.
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Supported: linux, osx, windows, cygwin.
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"""
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warn("Use `_screen_shape_wrapper()(file)[0]` instead of"
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" `_environ_cols_wrapper()(file)`", DeprecationWarning, stacklevel=2)
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shape = _screen_shape_wrapper()
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if not shape:
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return None
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@wraps(shape)
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def inner(fp):
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return shape(fp)[0]
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return inner
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def _term_move_up(): # pragma: no cover
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return '' if (os.name == 'nt') and (colorama is None) else '\x1b[A'
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def _text_width(s):
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return sum(2 if east_asian_width(ch) in 'FW' else 1 for ch in str(s))
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def disp_len(data):
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"""
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Returns the real on-screen length of a string which may contain
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ANSI control codes and wide chars.
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"""
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return _text_width(RE_ANSI.sub('', data))
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def disp_trim(data, length):
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"""
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Trim a string which may contain ANSI control characters.
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"""
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if len(data) == disp_len(data):
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return data[:length]
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ansi_present = bool(RE_ANSI.search(data))
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while disp_len(data) > length: # carefully delete one char at a time
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data = data[:-1]
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if ansi_present and bool(RE_ANSI.search(data)):
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# assume ANSI reset is required
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return data if data.endswith("\033[0m") else data + "\033[0m"
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return data
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