check if package is installed pip code example

Example 1: how to check if pip is installed

File"stdin",line 1

pip list

Syntax Error: invalid syntax

Example 2: bash check if python package is installed

$ python2 -m doesnt_exist |& grep -q 'No module named' && echo 'Nope' || echo 'Yup'
Nope

$ python2 -m math |& grep -q 'No module named' && echo 'Nope' || echo 'Yup'
Yup