[add] @new learn pipenv and pipfile usage

Author: MovingToWeb

Pipfile

@@ -0,0 +1,12 @@
+[[source]]
+name = "pypi"
+url = "https://pypi.org/simple"
+verify_ssl = true
+
+[dev-packages]
+
+[packages]
+Flask = "===1.1.1"
+
+[requires]
+python_version = "3.8"

Pipfile.lock

@@ -1,5 +1,5 @@
-# Playground repo for Python projects
-This repo has multiple branches and each branch represent different projects/proof of concepts for playing with Python technologies/frameworks.
-
-P.S. `master` branch is empty and has only this `README.md` file
-
+# Pipenv/Pipfile Understanding
+- `pipenv install` - Similar to `npm install`. Creates 2 files `Pipfile` and `Pipfile.lock` similar to `package-lock.json` in the javascript world with dependencies based on `requirements.txt`
+- `pipenv shell` - Activates the virtual environment. Much simpler than `virtualenv`
+- Once the shell is activated, run `python3 hello.py` to bring the Flask app UP!!
+- By default the flask app runs on 5000 port - `http://localhost:5000/hello`

README.md

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+
+from flask import Flask
+# set the project root directory as the static folder, you can set others.
+app = Flask(__name__)
+
+@app.route("/hello")
+def hello():
+ return "Hello World!"
+
+app.run(debug=True)

hello.py

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+flask===1.1.1