code: def flatten(x):
      f = cStringIO.StringIO()
      _flatten(x, f)
      return f.getvalue()
  
file_path: catboost/contrib/python/cffi/py3/cffi/ffiplatform.py
imports: import sys, os
  from .error import VerificationError
label_desc: Use image node_id 6 for calling a global function with example usage: flatten(x) and returns: f