from Flask import Flask ImportError: No module named Flask
问题 I am following the tutorial here. My file looks like this: from flask import Flask app = Flask(__name__) @app.route("/") def main(): return "Welcome!" if __name__ == "__main__": app.run() I run python app.py and get the following: Traceback (most recent call last): File "app.py", line 1, in <module> from flask import Flask ImportError: No module named Flask I do have flask installed. I was thinking it's a $PATH issue. I don't really know where to begin as far as troubleshooting goes. which