Record cell number when using a jupyter notebook

[valentinsulzer]

When using a notebook, it makes more sense to record the cell number than the name of the file. It might be possible to:

1. automatically detect if using a notebook environment

   def is_notebook():
   try:
       shell = get_ipython().__class__.__name__
       if shell == "ZMQInteractiveShell":  # pragma: no cover
           # Jupyter notebook or qtconsole
           cfg = get_ipython().config
           nb = len(cfg["InteractiveShell"].keys()) == 0
           return nb
       elif shell == "TerminalInteractiveShell":  # pragma: no cover
           return False  # Terminal running IPython
       elif shell == "Shell":  # pragma: no cover
           return True  # Google Colab notebook
       else:
           return False  # Other type (?)
   except NameError:
       return False  # Probably standard Python interpreter

2. return cell number instead of file name if so (using get_ipython().execution_count)