How to import a module at each execution of python?

Question

I need to run the command import numpy as np each time I run python. How to automatize it in linux. In other words, how do load a module each time python is launch with having to manually call it?

Answer 1

The -i flag can help with that. See man python.

 -i When a script is passed as first argument or the -c option is
 used, enter interactive mode after executing the script or the
 command. It does not read the $PYTHONSTARTUP file. This can be
 useful to inspect global variables or a stack trace when a script
 raises an exception.

So the below does what you want it to. Note that the -i flag needs to precede the -c otherwise it doesn't work.

 python -i -c 'import numpy'

• Błotosmętek: Actually a better way would be to create a file containing import numpy as np and assign its name to PYTHONSTARTUP - preferably in .bashrc or any other shell script that is executed by starting shell (depends on the shell being used).