code: def ipos():
      """Examples that access the operating system work:
  
      In [1]: !echo hello
      hello
  
      In [2]: !echo hello > /tmp/foo_iptest
  
      In [3]: !cat /tmp/foo_iptest
      hello
  
      In [4]: rm -f /tmp/foo_iptest
      """
      pass
  
file_path: catboost/contrib/python/ipython/py3/IPython/testing/plugin/dtexample.py
imports: import os
label_desc: Use image node_id 3 for calling a global function with example usage: ipos() without return types