How to write a cell magic that knows the input number of the cell?

Question

Is there a way to write a cell magic that knows the input number of the cell? By \"input number\" I mean the ? in the cell\'s In[?] prefix. At first gl

Answer 1

This information is provided by the execution_count of the current instance of the IPython shell, that can be obtained with get_ipython:

print(get_ipython().execution_count)