Install line_profiler

pip install line_profiler

To enable @profile decorator you need to run your code using kernprof script. According to the documentation:

kernprof will create an instance of LineProfiler and insert it into the __builtins__ namespace with the name profile

However, when running Django / Flask applications, you will want to run the whole code using the corresponding commands. To be able to profile your code in that case, you can use the following trick:

1. Add these lines on top of the module:

import line_profiler
profile = line_profiler.LineProfiler()

2. Add @profile decorator to the function / method you want to profile.

3. Add profile.print_stats() before the return statement to print the profile. You can set the output unit using profile.print_stats(output_unit=1e-3)

And that's all.