code: def test_tabs():
      """Test that there are no tabs in our source files."""
      ignore = _tab_ignores[:]
  
      for importer, modname, ispkg in walk_packages(
          celer.__path__, prefix="celer."
      ):
          if not ispkg and modname not in ignore:
              # mod = importlib.import_module(modname)  # not py26 compatible!
              try:
                  with warnings.catch_warnings(record=True):  # traits
                      __import__(modname)
              except Exception:  # can't import properly
                  continue
              mod = sys.modules[modname]
              try:
                  source = getsource(mod)
              except (
                  IOError
              ):  # user probably should have run "make clean"
                  continue
              assert "\t" not in source, (
                  '"%s" has tabs, please remove them '
                  "or add it to the ignore list" % modname
              )
  
file_path: celer/celer/tests/test_docstring_parameters.py
imports: import inspect
  import os.path
  import re
  import sys
  from unittest import SkipTest
  import warnings
  from pkgutil import walk_packages
  from inspect import getsource
  from numpydoc import docscrape
  import celer
label_desc: Use image node_id 4 for calling a global function with example usage: test_tabs() without return types