PYTHON

flask install

# install flask (basic, if path is not set yet)
py -m pip install flask
# or set PATH to use pip:
setx PATH "%PATH%;C:<path	opythondirectory>Scripts"
pip install flask
# if "connection error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed" [!]:
py -m pip install --trusted-host pypi.python.org pip flask
# if PermissionError: [WinError 5] Access is denied
py -m pip install --user flask
# or via creating a virtual environment venv:
py -m venv c:path	o
ewenvironment
# then execute:
c:path	o
ewenvironmentScriptsactivate.bat

install flask

$ pip install Flask

Install Flask

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

install flask

pip install -U Flask

flask setup

from flask import Flask
app = Flask(__name__)

@app.route("/")
def hello():
  return "Hello World!"

if __name__ == "__main__":
  app.run()

how to install flask

# Linux
sudo apt-get install python3-venv    # If needed
python3 -m venv .venv
source .venv/bin/activate

# macOS
python3 -m venv .venv
source .venv/bin/activate

# Windows
py -3 -m venv .venv
.venvscriptsactivate