<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def name(self):
 """ Get a name to uniquely identify this environment. """

        python = self._python
        if self._python.startswith('pypy'):
            # get_env_name adds py-prefix
            python = python[2:]
        return environment.get_env_name(self.tool_name, python, self._requirements)