code: def check_input(wsgi_input):
      for attr in ["read", "readline", "readlines", "__iter__"]:
          assert_(
              hasattr(wsgi_input, attr),
              "wsgi.input (%r) doesn't have the attribute %s"
              % (wsgi_input, attr),
          )
  
imports: import re
  import sys
  import warnings
label_desc: Use image node_id 5 for calling a global function with example usage: check_input(wsgi_input) without return types