added about lambda function

[dheeraj-2000]

[alexeygrigorev]

Hi @dheeraj-2000, thank you for your contribution! I intentionally didn't want to include questions about python syntax in the list. But I'll probaly create another one where you'll be able to put this answer

[dheeraj-2000]

@alexeygrigorev Yes, that will be better. Because few basic syntactical question are asked in interviews and it will be helpful for beginers. I've few other good concepts, will contribute to the new folder.

Thanks