Category: Python

Awesome Features of Jupyter Notebook (2): Different Methods to Run Python Files One can show and run .py file conveniently in Jupyter notebook 7.2. Display .py Code On Linux, there are three ways to show the code, namely !cat,t,cat On Widows, use !type For Linux In [ ]: !cat hello.py In [ ]: t hello.py In [ ]: cat hello.py For Windows In [ ]: !type hello.py Beside, there is another magic command %pycat, which works for both Linux and Windows. Whereas, Jupyter opens a pager and prints the output there. It is good to know all these commands; but I suggest you using t on Linux and !type on Windows. 7.3. Load .py File The magics %load and %loadpy are used to load a .py file into the current For example, let’s load the “hello.py” file in the working directory, just run either of the following codes. %load hello.py or %loadpy hello 7.4. Append to .py File The magic command %%writefile -a can be used to append codes to the end of the code in an existing file. For example, we want to add hello("Jack") to call the function. The above output of Appending to hello.py indicates code appending is successful. We can look the code by t(Linux) or !type(Windows) 7.5. Update .py File If you would like to add code or edit the code in the file rather than to append code to the end, you can run %%writefile again, which will update your code by overwtiting the old file.For example, %%writefile hello.py def hello(name): print(f"Hello, {name}!") hello("Mary") 7.6. Run .py File use %run filename.py For example, let’s run “hello.py” by: %run hello.py, or run hello.py For a function, there are other two convenient ways to run it. Method 1: run the function, and then call it # run the function %run greeting.py Then # call the function hello("Mary","Johson") Method 2: run the function as module # import the function as a module import greeting # call the function greeting.hello("Mary","Johson") 7.7. Run External Jupyter Notebook .ipynb files We can also run another Jupyter notebook inside the current working one using %run filename.ipynb For example, let's run the notebook named "myname.ipynb" notebook 7.8. Run Codes from a Python or IPython Shell Session another awsome feature of the Jupyter Notebook is that you can run scripts directory copied from a Python shell or IPython shell session. For example: Code from a Python Shell session: https://docs.python.org/3/tutorial/interpreter.html Code from a IPython Shell session: https://jakevdp.github.io/PythonDataScienceHandbook/01.02-shell-keyboard-shortcuts.html It need not to remove these prompts, >>> and In [ ], wherea it has to remove them in other IDEs or it will produce errors. It is very helpful for us to have a quick test for some codes online from a Python shell or IPython shell session.

Category: Python

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