Required Packages
For our sample blogging application, we’ll need to install Flask, py2neo, passlib, and bcrypt:
pip install flask
pip install py2neo
pip install passlib
pip install bcrypt
If we execute pip freeze again, we’ll see that we have more packages installed now:
pip freeze
Flask==0.10.1
Jinja2==2.7.3
MarkupSafe==0.23
Werkzeug==0.9.6
bcrypt==1.1.0
cffi==0.8.6
itsdangerous==0.24
passlib==1.6.2
py2neo==2.0.3
pycparser==2.10
six==1.9.0
wsgiref==0.1.2
As suggested by Flask’s documentation, these dependencies should be stored in a text file called requirements.txt:
pip freeze > requirements.txt