fix multiple problems stated in issue #629. Enhance runPython_bot

[aahnik]

Fixes #629

Description

• Logs should contain time-stamps in the deployer's desired time-zone instead of server time.
• Uplift ban from exponentiation ** as the cause of bug found and can be handled.
• Hanging in case of certain long calculations can be prevented.
• Reduce bot's response time by preventing the repetition of execution.

  earlier when there was no output after executing the code via python -c code, the bot would run eval(code).

• add new command /e to run pythonic expressions.
• add new commands /help and /code
• remove the dependency on Makefile as it had only a few lines
• add more detailed docstrings
• make the readme instructions simpler to follow.
• host the code for this in an independent repo, to make deploying and updating code on server steps easier.
• fix all pylint errors

Here is a gif of the new behavior of the bot: Click to view full screen 👇

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Enhancements
• Documentation Update

Checklist:

Please tick all the boxes that are fulfilled by your Pull Request.

• I have named my files and folder, according to this project's guidelines.
• My code follows the style guidelines of this project.
• My Pull Request has a descriptive title. (not a vague title like Update index.md)
• I have commented on my code, particularly in hard-to-understand areas.
• I have created a helpful and easy to understand README.md, according to the given README_TEMPLATE.
• I have included a requirements.txt file (if external libraries are required.)
• My changes do not produce any warnings.
• I have added a working sample/screenshot of the script.

[aahnik]

reviewed all changes.

[aahnik]

thanks a lot for merging @AdityaJ7 and @tusharnankani.

This is a short article I wrote in Dev.to about this bot Start chatting with Python on Telegram

Please do read and share. 🤗

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