SyntaxError: invalid syntax in lambda function

Steps to recreate error:

• Install pipreqs sudo pip install pipreqs
• Use pipreqs pipreqs fosscell-django/

fosscell-django is my virtualenv project directory and virtualenv is not active in any step

Error log

ERROR: Failed on file: fosscell-django/lib/python3.8/site-packages/openid/urinorm.py
Traceback (most recent call last):
  File "/usr/bin/pipreqs", line 8, in <module>
    sys.exit(main())
  File "/usr/lib/python3.8/site-packages/pipreqs/pipreqs.py", line 470, in main
    init(args)
  File "/usr/lib/python3.8/site-packages/pipreqs/pipreqs.py", line 406, in init
    candidates = get_all_imports(input_path,
  File "/usr/lib/python3.8/site-packages/pipreqs/pipreqs.py", line 138, in get_all_imports
    raise exc
  File "/usr/lib/python3.8/site-packages/pipreqs/pipreqs.py", line 124, in get_all_imports
    tree = ast.parse(contents)
  File "/usr/lib/python3.8/ast.py", line 47, in parse
    return compile(source, filename, mode, flags,
  File "<unknown>", line 76
    map(lambda (m, n): u'%s-%s' % (unichr(m), unichr(n)),
               ^
SyntaxError: invalid syntax

[MSVO]

That solved it. Thank you @jonafato . I uninstalled python-openid which was unused in my Python 3 project.

[jonafato]

I see now. I missed that this was a third-party package at first. I suspect that this code is not imported by your django project and wouldn’t work if it was. The line in question is https://github.com/openid/python-openid/blob/f7e13536f0d1828d3cef5ae7a7b55cabadff37fc/openid/urinorm.py#L76. Per the Requirements section of the README, python-openid is Python 2 only. I see some issues referencing https://github.com/necaris/python3-openid as an alternative, but I don’t use either library and can’t speak to that personally. I’d recommend removing that library from your project, but if you’d simply like to ignore that directory, you can use the --ignore flag with pipreqs.