I have a jupyter/ipython notebook that I am using for prototyping and tutoring.
I export it as a python script using the menu dropdown or nbconvert, i.e.
ipython nbconvert --to python notebook.ipynb
However, I would like to make notebook.py executable directly without having to hack it by hand each time, in order that I can keep updating notebook.ipynb and overwriting notebook.py with my changes. I also want to include command-line arguments in notebook.py. My boilerplate is, for example:
#!/usr/bin/env ipython
import sys
x=sys.argv[-1]
with chmod +x notebook.py of course.
One route could be to make these lines (be they python or command-line directives) ignorable in the jupyter/ipython notebook - is there a way to do this by e.g. detecting the jupyter/ipython environment?
Edit1: This is tantamount to saying:
How can I include lines in the notebook.ipynb that will be ignored in the notebook environment but parsed in notebook.py generated from it?
Edit2: This question is a partial answer, but doesn't tell me how to include the #!/usr/bin/env ipython line: How can I check if code is executed in the IPython notebook?
Edit3: Could be useful, but only if %%bash /usr/bin/env ipython would work - would it..? How do I provide inline input to an IPython (notebook) shell command?
Edit4: Another attempted answer (subtle): Since # is a comment in python, putting #!/usr/bin/env ipython in the first cell of the notebook means that it will be ignored in jupyter/ipython, but respected in the exported notebook.py. However, the #! directive is not at the top, but can easily be chopped off:
> more notebook.py
# coding: utf-8
# In[1]:
#!/usr/bin/env ipython
# In[2]:
print 'Hello'
# In[ ]: