@moorepants Many Autolev examples I came across were in all caps so I thought it wouldn't look good in Python. I agree with this though. Adding an option would be the best way to go.

Ok, so maybe something like:

parse_autolev(al_code, lower_case=True)

Gonna add "easy to fix" on this one. Might be good PR for a newcomer.

@moorepants I'd like to add this functionality, I am not very thorough with the code base yet so could you guide me with what auto lev parser is or if you tell me where the files for it is , I check physics/mechanics didn't find it any where.
Any help would be appreciated, Thanks!

The files are in sympy/parsing/autolev. @NikhilPappu can point you more directly to the relevant files.

Alright, can i work on this issue ? @moorepants

You don't need to ask if you can work on the issue. Just say you are and do it.

@CodHeK
The changes you would need to make are:

1. Add the parameter lower_case in parse_autolev() and in the Listener class in the files __init__.py, _parse_autolev_antlr.py and _listener_autolev_antlr.py. These files belong to sympy/parsing/autolev.
2. Go over all the .lower() occurences in _listener_autolev_antlr.py (there's a lot of them) and replace the ones which are meant for the output and not for internal comparison.
3. Add lower_case=True in the parse_autolev() call in sympy/parsing/tests/test_autolev.py so that the current tests pass.

@NikhilPappu Alright I'll make the following changes. Is there any way I could test it ?

@moorepants @CodHeK Now that I took a closer look at this, I feel it isn't that easy to fix for someone else. I think I shall fix it myself and maybe update it so that it is easier to make changes from now.

@NikhilPappu The Changes to .lower() need to made inside the class MyListener(AutolevListener) in the file _listener_autolev_antlr.py right ?
and only to the ones where it outputs that is in the self.write() calls?

@CodHeK Technically yes but there is a lot more to it. For instance, you would need to use .lower() in all dictionaries in the code to preserve the case insensitivity of the parser.

@NikhilPappu @moorepants I am working on this issue and want to completely understand this parser as I am willing to extend the parser for other languages as a project for GSOC'19.

@NikhilPappu Can you tell me what exact values does the ctx takes in _listener_autolev_antlr.py file.

Hello,
I would like to work on this issue.

@moorepants Hello Jason, hopefully you are fine!
Can you please check my pull request, it passed the required checks for merging, I can work on the optional dependencies if needed.
Thank you in advance!