<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def bootstrap_pex_env(entry_point):
 """Bootstrap the current runtime environment using a given pex."""

  pex_info = _bootstrap(entry_point)

  from .environment import PEXEnvironment
  PEXEnvironment(entry_point, pex_info).activate()