Pylint checkers are not working (basestring is not defined)

[robertkossendey]

pylint 2.7.2
astroid 2.5.1
Python 3.9.2 (default, Feb 24 2021, 13:26:01)

When running pylint with those checkers enabled and with a file that has a unnecessary split
statement, I encounter this error. It seems that the pylint_utils is currently bugged.

Stacktrace:

export PYTHONPATH="$PWD/pylint/palantir-pyspark" && pylint src/ --load-plugins=palantir_module

Traceback (most recent call last):
  File "/usr/local/bin/pylint", line 8, in <module>
    sys.exit(run_pylint())
  File "/usr/local/lib/python3.9/site-packages/pylint/__init__.py", line 22, in run_pylint
    PylintRun(sys.argv[1:])
  File "/usr/local/lib/python3.9/site-packages/pylint/lint/run.py", line 358, in __init__
    linter.check(args)
  File "/usr/local/lib/python3.9/site-packages/pylint/lint/pylinter.py", line 862, in check
    self._check_files(
  File "/usr/local/lib/python3.9/site-packages/pylint/lint/pylinter.py", line 896, in _check_files
    self._check_file(get_ast, check_astroid_module, name, filepath, modname)
  File "/usr/local/lib/python3.9/site-packages/pylint/lint/pylinter.py", line 922, in _check_file
    check_astroid_module(ast_node)
  File "/usr/local/lib/python3.9/site-packages/pylint/lint/pylinter.py", line 1054, in check_astroid_module
    retval = self._check_astroid_module(
  File "/usr/local/lib/python3.9/site-packages/pylint/lint/pylinter.py", line 1099, in _check_astroid_module
    walker.walk(ast_node)
  File "/usr/local/lib/python3.9/site-packages/pylint/utils/ast_walker.py", line 75, in walk
    self.walk(child)
  File "/usr/local/lib/python3.9/site-packages/pylint/utils/ast_walker.py", line 72, in walk
    callback(astroid)
  File "/WebstormProjects/data-infrastructure/pylint/palantir-pyspark/statement_call_checker.py", line 48, in visit_assign
    if get_length(node) + base_length <= 120:
  File "/WebstormProjects/data-infrastructure/pylint/palantir-pyspark/pylint_utils.py", line 104, in get_length
    value_length = get_length(arg.value)
  File "/WebstormProjects/data-infrastructure/pylint/palantir-pyspark/pylint_utils.py", line 89, in get_length
    compute_arguments_length(arg.args) + base_length
  File "/WebstormProjects/data-infrastructure/pylint/palantir-pyspark/pylint_utils.py", line 13, in compute_arguments_length
    args_length += get_length(arg)
  File "/WebstormProjects/data-infrastructure/pylint/palantir-pyspark/pylint_utils.py", line 77, in get_length
    if isinstance(arg.pytype(), basestring):
NameError: name 'basestring' is not defined

[SebasDrewes]

Basestring is no longer available in Python 3. From What’s New In Python 3.0:

The builtin basestring abstract type was removed. They should change basestring for str in pylint_utils file.