Create pow.py

[HenokB]

Please fill in this pull request template before submitting

1. This pull request resolves #126

2. Description

(Write description of your changes here)

3. Fill in checklist by marking [x]

• [ ] I've read the CONTRIBUTING.md
• [x] I was assigned to this issue
• [ ] My code is formatted using required linting
• [ ] I've run my code locally and checked it works

[HenokB]

Thanks and I've applied all your suggestions.

[HenokB]

linter what kind of linter?

[sabderemane]

The flake8 linter, one of the check failing You can see here. Don't hesitate to read the CONTRIBUTING guide to fix those issues.

[sabderemane]

@HenokB any news on that ?

[funbeedev]

@sabderemane I'll add the hacktoberfest-accepted label for now. @HenokB We'd appreciate if you made the requested changes soon :)