code: def prepend_environ_path(env, name, text, pathsep=os.pathsep):
      
      env[name] = prepend_path(env.get(name), text, pathsep=pathsep)
      return env
docs: Prepend `text` into a $PATH-like environment variable. `env` is a
      dictionary of environment variables and `name` is the variable name.
      `pathsep` is the character separating path elements, defaulting to
      `os.pathsep`. The variable will be created if it is not already in `env`.
      Returns `env`.
  
      Example::
  
        prepend_environ_path(env, 'PATH', '/mypackage/bin')
  
      The `name` and `text` arguments should be `str` objects; that is, bytes in
      Python 2 and Unicode in Python 3. Literal strings will be OK unless you
      use the ``from __future__ import unicode_literals`` feature.