Passing IPython variables as arguments to bash commands

by

Prefix your variable names with a $.

Example

Say you want to copy a file file1 to a path stored in a python variable named dir_pth:

dir_path = "/home/foo/bar"
!cp file1 $dir_path

from Ipython or Jupyter notebook

EDIT

Thanks to the suggestion from Catbuilts, if you want to concatenate multiple strings to form the path, use {..} instead of $..$.
A general solution that works in both situations is to stick with {..}

dir_path = "/home/foo/bar"
!cp file1 {dir_path}

And if you want to concatinate another string sub_dir to your path, then:

!cp file1 {dir_path + sub_dir}

EDIT 2

For a related discussion on the use of raw strings (prefixed with r) to pass the variables, see Passing Ipython variables as string arguments to shell command

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