In Pycharm, I can't fetch a JSON file and cannot install fetch

I am working on a Django project in Pycharm. I need to fetch API in the Javascript file, but it gives me an internal server error and error in the console showing the fetch line. It seems like it is not recognizing fetch at all.

This is an example of how I use fetch in my code;

    document.querySelector('#compose-form').onsubmit = function () {
     fetch('/emails', {
              method: 'POST',
              body: JSON.stringify({
                  recipients: in_recipients,
                  subject: in_subject,
                  body: in_body,
              })
            })
            .then(response => response.json())
            .then(result => {
                if (result.message !== "Email sent successfully."){
                  alert(result.error)
                }
            });
        };

My code is actually working on Vscode but can't make it work in Pycharm. I tried

     pip install fetch 

I got the following error;

 ERROR: Command errored out with exit status 1:
  Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\bilge\AppData\Local\Temp\pip-install-n1v3op9a\fetch\setup.py", line 6, in <module>
    description = file(os.path.join(here, 'README.txt')).read()
NameError: name 'file' is not defined
----------------------------------------
 ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full 
 command output.

Also tried

        python setup.py egg_info

says:

        can't open file 'setup.py': [Errno 2] No such file or directory

Thank you in advance.