Pycharm extension installation
If you are using Pycharm, an alternative way to install an extension is the following:

File --> Settings --> Project: "Your project name" --> Project Interpreter
Click the '+' icon and search for 'Flask-Mail'
Click Install Package
I have a problem in installing extenstions like flask-mail when using pip install ; when I wrote the command there is no error but nothing happened .what is the problem?