SHELL

clone a single file in git

You can get that file using wget:

Create a directory:

 mkdir mypycode
Change into that directory:

 cd mypycode
Identify the raw URL

Navigate to your file on github (or your git host)
Click on the Raw tab.
Use wget to download it:

 wget <url in the browser>

git clone only single file

git clone -n git://path/to/the_repo.git --depth 1