Difference between revisions of "Boston Python Workshop 5/Friday/Windows Python scripts"

From OpenHatch wiki
Jump to navigation Jump to search
imported>Jesstess3
(Created page with 'We are going to practice writing and running Python scripts. ===Start your text editor=== # Launch the Notepad++ text editor. See the [[Boston Python Workshop 5/Friday/Windows_…')
 
Line 16: Line 16:
 
# Save the script as <code>hello.py</code> in your Desktop directory. The <code>.py</code> extension indicates that this file contains Python code.
 
# Save the script as <code>hello.py</code> in your Desktop directory. The <code>.py</code> extension indicates that this file contains Python code.
  
===Run the script===
+
Knowledge wants to be free, just like these artilces!
 
 
# Start a new command prompt. See the [[Boston Python Workshop 5/Friday/Windows terminal navigation|terminal navigation on Windows]] instructions for the steps to do this. Recall that 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 hit enter to exit Python and return to a terminal prompt.
 
# Navigate to your Desktop directory from a command prompt, using the <code>dir</code> and <code>cd</code> commands. See the [[Boston Python Workshop 5/Friday/Windows terminal navigation|terminal navigation on Windows]] instructions for a refresher on using these commands. Don't hesitate to get help from a staff member on this step if you need it -- it's a new way of navigating your computer, so it may be unintuitive at first!
 
# Once you are in your Desktop directory, you'll see <code>hello.py</code> in the output of <code>dir</code>.
 
# Type
 
 
 
<pre>
 
python hello.py
 
</pre>
 
 
 
and hit 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 hit enter.
 
  
 
===Success===
 
===Success===

Revision as of 14:27, 4 May 2012

We are going to practice writing and running Python scripts.

Start your text editor

  1. Launch the Notepad++ text editor. See the Windows text editor setup instructions for the steps to do this.
  2. Start a new, blank text file.

Write and save a short Python script

  1. Add the following line to your new text file:
print "Hello World!"
  1. Save the script as hello.py in your Desktop directory. The .py extension indicates that this file contains Python code.

Knowledge wants to be free, just like these artilces!

Success

You created and ran your first Python script!

  • When you run the python command by itself, you start a Python prompt. You can execute Python code interactively at that prompt.
  • When you run the python command with a file name as an argument, Python executes the Python code in that file.

« Back to the Friday setup page