parameters: (self, f, pos=None)
docstring: Initialize a _ProxyFile.
docstring_summary: Initialize a _ProxyFile.
docstring_tokens: Initialize a _ProxyFile .
function: def __init__(self, f, pos=None):
          """Initialize a _ProxyFile."""
          self._file = f
          if pos is None:
              self._pos = f.tell()
          else:
              self._pos = pos
function_tokens: def __init__ ( self , f , pos = None ) : self . _file = f if pos is None : self . _pos = f . tell ( ) else : self . _pos = pos