Note that you cannot import Python scripts this way (because of Apple's restrictions on importing code). If you want to import Python code from somewhere else, you can copy and paste it into Pythonista, or put it in a zip file and import that.
but most wanted: import Python code from somewhere else
since Pyhonista doesn't provide this function by default, the first thing after installing Pythonista is to add a script to do this. just search in this forum and you can easily find code to import Python code from somewhere else.
I heard that Pythonista once provided this feature by default, but Apple forced it to remove it. what a pity