Python glob vs glob recursive - loop directory

import glob

p = glob.glob('*.py')
print(p)
print(len(p)) #17

#single star - all files in current dir
p = glob.glob('*', recursive=True)
print(p)
print(len(p)) #20

#double star - all folders and files recursively in current dir
p = glob.glob('**', recursive=True)
print(p)
print(len(p)) #22


"""
Output:
['timeit_test.py', 'args_kwargs.py', 'fibonacci.py', 'shallow_vs_deep_copy.py', 'inheritance_example.py', 'python_closure.py', 'super_test.py', 'date_example.py', 'contextlib_example.py', 're_compile_vs_match.py', 'iterator_example.py', 'str_repr_eval.py', 'generator_example.py', 'init_vs_call.py', 'main.py', 'filter_map_reduce.py', '_test_runner.py']
17

['timeit_test.py', 'args_kwargs.py', 'fibonacci.py', 'shallow_vs_deep_copy.py', 'inheritance_example.py', 'python_closure.py', 'super_test.py', 'utils', 'date_example.py', 'contextlib_example.py', 'test1.txt', 're_compile_vs_match.py', 'test.txt', 'iterator_example.py', 'str_repr_eval.py', 'generator_example.py','init_vs_call.py', 'main.py', 'filter_map_reduce.py', '_test_runner.py']
20

['timeit_test.py', 'args_kwargs.py', 'fibonacci.py', 'shallow_vs_deep_copy.py', 'inheritance_example.py', 'python_closure.py', 'super_test.py', 'utils', 'utils/__init__.py', 'utils/utils.py', 'utils/utils1', 'date_example.py', 'contextlib_example.py','test1.txt', 're_compile_vs_match.py', 'test.txt', 'iterator_example.py', 'str_repr_eval.py', 'generator_example.py', 'init_vs_call.py', 'main.py', 'filter_map_reduce.py', '_test_runner.py']
22
"""