how to install flask on mac code example

Example 1: import flask

from flask import Flask
app = Flask(__name__)

@app.route('/')
def hello_world():
    return 'Hello, World!'

Example 2: install flask in venv

$ pip install Flask

Example 3: flask install venv

python -3 -m venv venv

Example 4: how to import flask

from flask import Flask

app = Flask(__name__)

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

Example 5: how to install pip flask on macos

sudo python2 -m pip install virtualenv