flask setup

1# install flask (basic, if path is not set yet)
2py -m pip install flask
3# or set PATH to use pip:
4setx PATH "%PATH%;C:\<path\to\python\directory\>\Scripts"
5pip install flask
6# if "connection error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed" [!]:
7py -m pip install --trusted-host pypi.python.org pip flask
8# if PermissionError: [WinError 5] Access is denied
9py -m pip install --user flask
10# or via creating a virtual environment venv:
11py -m venv c:\path\to\new\environment
12# then execute:
13c:\path\to\new\environment\Scripts\activate.bat

1pip install flask

1pip install -U Flask
2

1pip install flask
2Or If The Problem is "pip" not Found Use : 
3py -m pip install flask

1$ pip install Flask
2

1from flask import Flask
2app = Flask(__name__)
3
4@app.route("/")
5def hello():
6  return "Hello World!"
7
8if __name__ == "__main__":
9  app.run()
10