Solved by AvratanuBiswas in post #2 
              
              
                Hello @tanbin-hasnat-shehab , 
You can use this module to generate your requiremnts.txt file 
https://pypi.org/project/pipreqs/ 
In one of my very last projects, I used Pyrebase - [Pyrebase==3.0.27]. 
Hope it helps. 
Cheers! 
Avra