Question: how to comment and uncomment multiple lines in pycharm?
Answer: ctrl+[SPACE] Complete code., shift+ctrl+/ Comment/uncomment code with block comments., ctrl+/ Comment/uncomment current line or selected block with line comments., shift+ctrl+↵ Complete Current Statement., ctrl+I. ... , ctrl+O. ... , ctrl+P. ... , Surround selected code fragment with if, while, try/catch or other construct.