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Compatibility module to provide backwards compatibility for useful Python
features.
This is mainly for use of internal Twisted code. We encourage you to use
the latest version of Python directly from your code, if possible.
@var unicode: The type of Unicode strings, C{unicode} on Python 2 and C{str}
on Python 3.
@var NativeStringIO: An in-memory file-like object that operates on the native
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In Python 3, L{inspect.currentframe} does not take a stack-level argument.
Restore that functionality from Python 2 so we don't have to re-implement
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Execute a Python script in the given namespaces.
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use of the deprecated builtin C{execfile} function.
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Class decorator that ensures support for the special C{__cmp__} method.
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Determine the type which will be returned from the given file object's
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@type fileIshObject: L{object}
@param default: A default value to return when the type of C{fileIshObject}
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@return: There are 3 possible return values:
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Some functions, such as C{os.path.join}, operate on string arguments which
may be bytes or text, and wish to return a value of the same type. In
those cases you may wish to have a string constant (in the case of
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parsing or processing, that must be of a matching type in order to use
string operations on it. L{_matchingString} will take a constant string
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