code: def test_import_parser_all():
      # All interface
      from dateutil.parser import parse
      from dateutil.parser import parserinfo
  
      # Other public classes
      from dateutil.parser import parser
  
      for var in (parse, parserinfo, parser):
          assert var is not None
  
imports: import sys
  import pytest
label_desc: Use image node_id 8 for calling a global function with example usage: test_import_parser_all() without return types