install requirements.txt in virtualenv code example

Example 1: install requirements.txt

pip install -r requirements.txt

Example 2: pip install from requirements.txt

$ pip install -r requirements.txt

Example 3: install requirements.txt in pip command

note: yor should be on the same dir as requirements.txt file 

pip install -r requirements.txt

Example 4: how to run django requirement.txt

$ pip3 install -r requirements.txt ---> For linux

Example 5: how to use virtual environment python

python3 -m pip install --user virtualenv

Example 6: how to make virtual environment

virtualenv mypython