glob -

I am going over glob and iglob. iblog doesn’t fill up your memory with a list. I am also using os.getcwd or get current working directory and os.chdir for change directory. glob creates a list. iglob brings down one directory/file at a time. I went down to the cli directory to keep the output smaller.

1.) Show current directory
2.) Change directory down to cli
3.) first glob command prints out the list.
4.) I take the list and parse it with a loop into files.
5.) I take the same command with iglob
6.) I print the iglob with a loop
7.) I change it to only show .py files.

#!/usr/bin/env/python3


def main():
    from glob import glob
    from glob import iglob
    import os

    cwd = os.getcwd()
    print("current directory", os.getcwd())
    new_path = "venv/lib/python3.8/site-packages/pip/_internal/cli"
    print('changed path to {}'.format(new_path))
    cwd = os.chdir('venv/lib/python3.8/site-packages/pip/_internal/cli')
    print("current directory", os.getcwd())
    print("")

    files = glob('./**/*.*', recursive=True)
    print("files in a list using glob, uses up memory")
    print(files)
    print("")

    print('print glob files in for loop')
    for i in files:
        print('{}'.format(i))

    files = iglob('./**/*.*', recursive=True)
    print("")

    print('print iglob files in for loop')
    for i in files:
        print('{}'.format(i))

    files = iglob('./**/*.py', recursive=True)
    print("")

    print('print iglob .py files in for loop')
    for i in files:
        print('{}'.format(i))


if __name__ == '__main__':
    main()

/home/michael/PycharmProjects/glob/venv/bin/python /home/michael/PycharmProjects/glob/main.py
current directory /home/michael/PycharmProjects/glob
changed path to venv/lib/python3.8/site-packages/pip/_internal/cli
current directory /home/michael/PycharmProjects/glob/venv/lib/python3.8/site-packages/pip/_internal/cli

files in a list using glob, uses up memory
['./__init__.py', './main_parser.py', './autocompletion.py', './progress_bars.py', './parser.py', './base_command.py', './command_context.py', './cmdoptions.py', './status_codes.py', './main.py', './req_command.py', './spinners.py', './__pycache__/progress_bars.cpython-38.pyc', './__pycache__/status_codes.cpython-38.pyc', './__pycache__/command_context.cpython-38.pyc', './__pycache__/cmdoptions.cpython-38.pyc', './__pycache__/spinners.cpython-38.pyc', './__pycache__/parser.cpython-38.pyc', './__pycache__/base_command.cpython-38.pyc', './__pycache__/req_command.cpython-38.pyc', './__pycache__/autocompletion.cpython-38.pyc', './__pycache__/__init__.cpython-38.pyc', './__pycache__/main_parser.cpython-38.pyc', './__pycache__/main.cpython-38.pyc']

print glob files in for loop
./__init__.py
./main_parser.py
./autocompletion.py
./progress_bars.py
./parser.py
./base_command.py
./command_context.py
./cmdoptions.py
./status_codes.py
./main.py
./req_command.py
./spinners.py
./__pycache__/progress_bars.cpython-38.pyc
./__pycache__/status_codes.cpython-38.pyc
./__pycache__/command_context.cpython-38.pyc
./__pycache__/cmdoptions.cpython-38.pyc
./__pycache__/spinners.cpython-38.pyc
./__pycache__/parser.cpython-38.pyc
./__pycache__/base_command.cpython-38.pyc
./__pycache__/req_command.cpython-38.pyc
./__pycache__/autocompletion.cpython-38.pyc
./__pycache__/__init__.cpython-38.pyc
./__pycache__/main_parser.cpython-38.pyc
./__pycache__/main.cpython-38.pyc

print iglob files in for loop
./__init__.py
./main_parser.py
./autocompletion.py
./progress_bars.py
./parser.py
./base_command.py
./command_context.py
./cmdoptions.py
./status_codes.py
./main.py
./req_command.py
./spinners.py
./__pycache__/progress_bars.cpython-38.pyc
./__pycache__/status_codes.cpython-38.pyc
./__pycache__/command_context.cpython-38.pyc
./__pycache__/cmdoptions.cpython-38.pyc
./__pycache__/spinners.cpython-38.pyc
./__pycache__/parser.cpython-38.pyc
./__pycache__/base_command.cpython-38.pyc
./__pycache__/req_command.cpython-38.pyc
./__pycache__/autocompletion.cpython-38.pyc
./__pycache__/__init__.cpython-38.pyc
./__pycache__/main_parser.cpython-38.pyc
./__pycache__/main.cpython-38.pyc

print iglob .py files in for loop
./__init__.py
./main_parser.py
./autocompletion.py
./progress_bars.py
./parser.py
./base_command.py
./command_context.py
./cmdoptions.py
./status_codes.py
./main.py
./req_command.py
./spinners.py

Process finished with exit code 0