{"id":7551,"date":"2022-08-08T00:00:00","date_gmt":"2022-08-08T00:00:00","guid":{"rendered":"https:\/\/academy.deepsim.caawesome-features-of-jupyter-notebook-2-different-methods-to-run-python-files-792310f6e8b1\/"},"modified":"2022-11-25T03:55:08","modified_gmt":"2022-11-25T03:55:08","slug":"awesome-features-of-jupyter-notebook-2-different-methods-to-run-python-files-792310f6e8b1","status":"publish","type":"post","link":"https:\/\/academy.deepsim.ca\/zh\/awesome-features-of-jupyter-notebook-2-different-methods-to-run-python-files-792310f6e8b1\/","title":{"rendered":"Jupyter Notebook\u521b\u5efaPython\u6587\u4ef6\u7684\u65b9\u6cd5"},"content":{"rendered":"\n

The Jupyter notebook is also a very handy Python Web IDE, in which, besides creating and running .ipynb files, one can create Python (.py) files<\/a>, display and run them very conveniently. I showed how to create a Python (.py) file in the Jupyter notebook using different methods in a previous post<\/a>. I will continue to show to how to display, edit, run Python (.py) file and an external .ipynb file in Jupyter note in this post.<\/p>\n\n\n\n

1. How to Display a .py<\/code> file in Jupyter Notebook<\/h3>\n\n\n\n

There are three commands, namely !cat<\/code>, %cat<\/code>, cat<\/code> to show a Python code snippet in a code cell in Jupyter notebook on the Linux system, while we use !type<\/code> on the Widows’ system to do the same work. For example, let’s create\u00a0a hello.py<\/code> file first and put the following code snippet in the file. If you are not sure how to create it, please read the post<\/a>.\u00a0Then put the file in the working directory.<\/p>\n\n\n\n

def hello(name):\n  print(f\"Hello, {name}!\")<\/code><\/pre>\n\n\n\n
On Linux System<\/h4>\n\n\n\n
Type one of the following codes in a code cell of Jupyter notebook and then run it.<\/p>\n\n\n\n
!cat hello.py<\/code><\/pre>\n\n\n\n
Or <\/pre>\n\n\n\n
%cat hello.py<\/code><\/pre>\n\n\n\n
 Or<\/pre>\n\n\n\n
cat hello.py<\/code><\/pre>\n\n\n\n
The output looks as follows:<\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
For Windows Sytem:<\/h4>\n\n\n\n
Just use the following command code instead, we will get the similar output as above.<\/pre>\n\n\n\n
!type hello.py<\/code><\/pre>\n\n\n\n
Besides, there is another magic command %pycat<\/code>, which works for both Linux and Windows. Whereas, Jupyter opens a pager<\/strong> and prints the output there.<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
It is good to know all these commands; but I suggest you using %cat<\/code> on Linux and !type<\/code> on Windows.<\/p>\n\n\n\n
2. Load .py<\/code> File<\/h3>\n\n\n\n
The magics %load<\/code> and %loadpy<\/code> are used to load a .py<\/code> file into the current code cell, and then you can edit and run it.<\/p>\n\n\n\n
For example, let\u2019s load the \u201chello.py\u201d file in the working directory, just run either of the following commands.<\/p>\n\n\n\n
%load hello.py<\/code><\/pre>\n\n\n\n
or<\/strong><\/pre>\n\n\n\n
%loadpy hello<\/code><\/pre>\n\n\n\n
After running the command, Jupyter notebook loads python code immediately in the cell as follows, and then you edit it. <\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
3. Append to .py<\/code> File<\/h3>\n\n\n\n
The magic command %%writefile -a<\/code> can be used to append codes to the end of the code in an existing file. For example, we want to add hello(\"Sigmund\")<\/code> at the end of the function.<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
The above output of Appending to hello.py<\/strong> indicates code appending is successful. We can check the code by %cat<\/code>, !cat (Linux) or !type<\/code>(Windows).<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
4. Update .py<\/code> File<\/h3>\n\n\n\n
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<\/code> again, which will update your code by overwriting the old file. For example,<\/p>\n\n\n\n
<\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
5. Run .py<\/code> File<\/h3>\n\n\n\n
To run the Python file, we use %run filename.py<\/code>. For example, let\u2019s run \u201chello.py\u201d by:<\/p>\n\n\n\n
%run hello.py<\/code><\/pre>\n\n\n\n
or <\/p>\n\n\n\n
run hello.py<\/code><\/pre>\n\n\n\n
The output looks as follows:<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
For a function, there are other two convenient ways to run it.<\/p>\n\n\n\n
Method 1: run the function, and then call it<\/strong><\/p>\n\n\n\n
<\/pre>\n\n\n\n
# run the function\n%run greeting.py<\/code><\/pre>\n\n\n\n
Then<\/p>\n\n\n\n
# call the function\nhello(\"Sigmund\")<\/code><\/pre>\n\n\n\n
Method 2: run the function as module<\/strong><\/p>\n\n\n\n
# import the function as a module\nimport greeting\n\n# call the function\ngreeting.hello(\"Sigmund\")<\/code><\/pre>\n\n\n\n
6. Run External Jupyter Notebook .ipynb<\/code> files<\/h3>\n\n\n\n
Besides, we can also run another Jupyter notebook inside the current working on using
%run filename.ipynb<\/code>
For example, let’s create a Jupyter notebook named “myname.ipynb” and run it in a new Jupyter notebook.<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
7. Run Codes from a Python or IPython Shell Session<\/h3>\n\n\n\n
Another awesome feature of the Jupyter Notebook is that you can run scripts directly copied from a Python shell or IPython shell session. For example:<\/p>\n\n\n\n
(1) Code from a Python Shell session: https:\/\/docs.python.org\/3\/tutorial\/interpreter.html<\/a>
(2) Code from a IPython Shell session: https:\/\/jakevdp.github.io\/PythonDataScienceHandbook\/01.02-shell-keyboard-shortcuts.html<\/a><\/p>\n\n\n\n
It need not remove these prompts, >>><\/strong> and In [ ]<\/strong>, whereas it has to remove them in other IDEs, or it will produce errors.<\/p>\n\n\n\n
For example, a code snippet is taken from Python Shell session:<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
For example, a code snippet is taken from IPython Shell session:<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
This feature of Jupyter notebook is very helpful for us to have a quick test for some codes online from a Python shell or IPython shell session.<\/p>\n\n\n\n
8. Brief Summary<\/h3>\n\n\n\n
This article presents how to edit and run Python files in Jupyter Notebook, which includes how to display a .py<\/code> file in Jupyter Notebook, load .py<\/code> file in Jupyter Notebook, append .py<\/code> file in Jupyter Notebook, update .py<\/code> file in Jupyter Notebook, run .py<\/code> file in Jupyter Notebook, run an external Jupyter Notebook .ipynb<\/code> file in a new Jupyter notebook as well run a Python scripts directly copied from a Python shell or IPython shell session.<\/p>\n","protected":false},"excerpt":{"rendered":"
The Jupyter notebook is also a very handy Python Web IDE, in which, besides creating and running .ipynb files, one<\/p>","protected":false},"author":2,"featured_media":8650,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[66,65],"tags":[63,62],"class_list":["post-7551","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-jupyter-notebook","category-python","tag-jupyter-notebook","tag-python"],"_links":{"self":[{"href":"https:\/\/academy.deepsim.ca\/zh\/wp-json\/wp\/v2\/posts\/7551","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/academy.deepsim.ca\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/academy.deepsim.ca\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/academy.deepsim.ca\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/academy.deepsim.ca\/zh\/wp-json\/wp\/v2\/comments?post=7551"}],"version-history":[{"count":0,"href":"https:\/\/academy.deepsim.ca\/zh\/wp-json\/wp\/v2\/posts\/7551\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/academy.deepsim.ca\/zh\/wp-json\/wp\/v2\/media\/8650"}],"wp:attachment":[{"href":"https:\/\/academy.deepsim.ca\/zh\/wp-json\/wp\/v2\/media?parent=7551"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/academy.deepsim.ca\/zh\/wp-json\/wp\/v2\/categories?post=7551"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/academy.deepsim.ca\/zh\/wp-json\/wp\/v2\/tags?post=7551"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}