Python in Jupyter: Difference between revisions

Revision as of 01:44, 18 January 2020

We are going to practice writing and running Python programs (often called "scripts").

TODO:

Make sure the notebook is in your desktop (this keeps things simple)
Open the notebook in jupyter tab in browser.
Notebook itself should encourage them to run some cells.

Download a Jupyter Notebook

Save the file at the following link to your desktop. Then open it as you were instructed previously. CDSW Jupter test notebook

Test the notebook

Following the instructions in the notebook, run the cell that says:

 print("hello world")

You should see "hello world" output right below. If that works you have a working setup for Python and Jupyter. Feel free to play around in the notebook. Try it out and explore!

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 TODO:
-* Download a sample notebook
 * Make sure the notebook is in your desktop (this keeps things simple)
 * Open the notebook in jupyter tab in browser.
 * Notebook itself should encourage them to run some cells.
-* Terminal navigation instructions below should be updated to work for MacOS and Windows
-* [[Windows terminal navigation|terminal navigation on Windows]] and [[MacOS_terminal_navigation|terminal navigation on Mac]] instructions should be checked/updated, too.
 === Download a Jupyter Notebook ===
-Save the file at the following link and then open it as you were instructed previously.
+Save the file at the following link to your desktop. Then open it as you were instructed previously.
 [https://communitydata.science/~groceryheist/CDSW_Jupyter_test_notebook%20.ipynb CDSW Jupter test notebook]
+[[File:Champagne.png|100px]][[File:Party.png|125px]]
-===Download and start your text editor ===
+=== Test the notebook ===
-[[File:Anaconda home window.png|frameless|400px]]
-# Launch Anaconda Navigator
-# Find the '''"VSCode"''' application in the Anaconda Navigator '''"Home"''' window. If it is not yet installed, click "Install" (this may take a few minutes)
-# Launch the VSCode text editor.
-===Write and save a short Python script===
-# Click "New file" to start a new, blank text file.
-# Add the following line to your new text file:
-<pre>
-print("Hello World!")
-</pre>
-# Save the script as <code>hello.py</code> in your Desktop directory. The <code>.py</code> extension indicates that this file contains Python code.
-=== Navigate to the script in your terminal ===
-# Start a new terminal prompt. See the [[Windows terminal navigation|terminal navigation on Windows]] or [[MacOS_terminal_navigation|terminal navigation on Mac]] instructions for the steps to do this. Recall that on Windows a terminal prompt will look like <code>C:\</code> and a Python prompt will look like <code>>>></code>. Make sure you are at a terminal prompt and not a Python prompt; if you are at a Python prompt, you can type <code>exit()</code> on a line by itself and then press enter to exit Python and return to a terminal prompt.
-# Navigate to your Desktop directory from a PowerShell terminal prompt, using the <code>ls</code> and <code>cd</code> commands. See the [[Windows terminal navigation|terminal navigation on Windows]] or [[MacOS_terminal_navigation|terminal navigation on Mac]] instructions for a refresher on using these commands. Don't hesitate to get help from a mentor on this step if you need it -- it's a new way of navigating around your computer, so it may be unintuitive at first!
-=== Run the script ===
-# Once you are in your Desktop directory, you'll see <code>hello.py</code> in the output of <code>ls</code>.
-# Type
-<pre>
-python hello.py
-</pre>
-and press enter. Doing this will cause Python to execute the contents of that script -- it should print "Hello World!" to the screen. What you've done here is run the Python application with an argument -- the name of a file, in this case "hello.py". Python knows that when you give it a file name as an argument, it should execute the contents of the provided file. You get the same result as if you typed
-<pre>
-print("Hello World!")
-</pre>
-at a Python prompt and press enter.
-=== Success ===
-You created and ran your first Python script!
-* When you run the <code>python</code> command by itself, you start a Python prompt. You can execute Python code interactively at that prompt.
+Following the instructions in the notebook, run the cell that says:
-* When you run the <code>python</code> command with a file name as an argument, Python executes the Python code in that file.
+  print("hello world")
-[[File:Champagne.png|100px]][[File:Party.png|125px]]
+You should see "hello world" output right below. If that works you have a working setup for Python and Jupyter.
+Feel free to play around in the notebook. Try it out and explore!
 [[Category:CDSW]][[Category:Shared Pages]]