`arg_name=True` not usable in Jupyter & IPython

[auderson]

from objprint import op

def func():
    return 1

cc = op(func(), arg_name=True)

maybe it's because here:

objprint/src/objprint/frame_analyzer.py

Lines 55 to 58 in 7920c86

	module = inspect.getmodule(frame)
	if module is None:
	return None
	source = inspect.getsource(module)

module is None for Jupyter & IPython, but they have file:
jupyter:

ipython:

and source can be retrieved with:

Change to source = inspect.getsource(frame) will work:

[gaogaotiantian]

Hmm, okay. I'll admit that I don't use Jupyter so it's never my first priority. I'll take a look at this and see if can be gracefully fixed.