old_contents: __author__ = 'Shyue Ping Ong'
  __copyright__ = 'Copyright 2013, The Materials Project'
  __version__ = '0.1'
  __maintainer__ = 'Shyue Ping Ong'
  __email__ = 'ongsp@ucsd.edu'
  __date__ = '1/24/14'
  
  import os
  
  from contextlib import contextmanager
  
  @contextmanager
  def cd(path):
      """
      A Fabric-inspired cd context that temporarily changes directory for
      performing some tasks, and returns to the original working directory
      afterwards. E.g.,
  
          with cd("/my/path/"):
              do_something()
  
      Args:
          path: Path to cd to.
      """
      cwd = os.getcwd()
      os.chdir(path)
      yield
      os.chdir(cwd)
new_contents: from __future__ import absolute_import
  
  __author__ = 'Shyue Ping Ong'
  __copyright__ = 'Copyright 2013, The Materials Project'
  __version__ = '0.1'
  __maintainer__ = 'Shyue Ping Ong'
  __email__ = 'ongsp@ucsd.edu'
  __date__ = '1/24/14'
  
  import os
  
  from contextlib import contextmanager
  
  @contextmanager
  def cd(path):
      """
      A Fabric-inspired cd context that temporarily changes directory for
      performing some tasks, and returns to the original working directory
      afterwards. E.g.,
  
          with cd("/my/path/"):
              do_something()
  
      Args:
          path: Path to cd to.
      """
      cwd = os.getcwd()
      os.chdir(path)
      yield
      os.chdir(cwd)
subject: Add import.