z*dZddlZddlZddlZddlZddlZddlZddlZddlZddl m Z eje Z dZdZdZeeeegZeZdZdZd Zd Zd Zd Zd ZdZdZdZdZdZddZ dZ!dZ"dZ#y)z-Helper functions for commonly used utilities.N)urllibWARNING EXCEPTIONIGNOREzFile: {0}: Is a symbolic link.z{0}: Is a directoryz,Cannot access {0}: No such file or directorycfd}ttjr|Stj\}}}}t t |t |z S)aA decorator to declare that only the first N arguments my be positional. This decorator makes it easy to support Python 3 style keyword-only parameters. For example, in Python 3 it is possible to write:: def fn(pos1, *, kwonly1=None, kwonly1=None): ... All named parameters after ``*`` must be a keyword:: fn(10, 'kw1', 'kw2') # Raises exception. fn(10, kwonly1='kw1') # Ok. Example ^^^^^^^ To define a function like above, do:: @positional(1) def fn(pos1, kwonly1=None, kwonly2=None): ... If no default value is provided to a keyword argument, it becomes a required keyword argument:: @positional(0) def fn(required_kw): ... This must be called with the keyword parameter:: fn() # Raises exception. fn(10) # Raises exception. fn(required_kw=10) # Ok. When defining instance or class methods always remember to account for ``self`` and ``cls``:: class MyClass(object): @positional(2) def my_method(self, pos1, kwonly1=None): ... @classmethod @positional(2) def my_method(cls, pos1, kwonly1=None): ... The positional decorator behavior is controlled by ``_helpers.positional_parameters_enforcement``, which may be set to ``POSITIONAL_EXCEPTION``, ``POSITIONAL_WARNING`` or ``POSITIONAL_IGNORE`` to raise an exception, log a warning, or do nothing, respectively, if a declaration is violated. Args: max_positional_arguments: Maximum number of positional arguments. All parameters after the this index must be keyword only. Returns: A decorator that prevents using arguments after max_positional_args from being used as positional parameters. 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Returns: string, The actual key if the contents are from a PEM file, or else None. s -----BEGIN N)find) raw_key_inputoffsets r _parse_pem_keyrhs-   /F |VW%%r"c0tj|dS)N),:) separators)jsondumps)datas r _json_encoderps ::dz 22r"ct|tjr|j|n|}t|tjr|St dj |)a4Converts a string value to bytes, if necessary. Unfortunately, ``six.b`` is insufficient for this task since in Python2 it does not modify ``unicode`` objects. Args: value: The string/bytes value to be converted. encoding: The encoding to use to convert unicode to bytes. Defaults to "ascii", which will not allow any characters from ordinals larger than 127. Other useful values are "latin-1", which which will only allows byte ordinals (up to 255) and "utf-8", which will encode any unicode that needs to be. Returns: The original value converted to bytes (if unicode) or as passed in if it started out as bytes. 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