parameters: (self, locator=None)
docstring: Initialise an instance, using the specified locator
          to locate distributions.
docstring_summary: Initialise an instance, using the specified locator
          to locate distributions.
docstring_tokens: Initialise an instance using the specified locator to locate distributions .
function: def __init__(self, locator=None):
          """
          Initialise an instance, using the specified locator
          to locate distributions.
          """
          self.locator = locator or default_locator
          self.scheme = get_scheme(self.locator.scheme)
function_tokens: def __init__ ( self , locator = None ) : self . locator = locator or default_locator self . scheme = get_scheme ( self . locator . scheme )