Anonymous user
Boston Python Workshop 3/Friday/Windows Python scripts: Difference between revisions
Boston Python Workshop 3/Friday/Windows Python scripts (view source)
Revision as of 13:06, 24 September 2011
, 12 years agoProtected "Boston Python Workshop 3/Friday/Windows Python scripts" ([edit=autoconfirmed] (indefinite) [move=autoconfirmed] (indefinite))
imported>Jesstess m (Protected "Boston Python Workshop 3/Friday/Windows Python scripts" ([edit=autoconfirmed] (indefinite) [move=autoconfirmed] (indefinite))) |
|||
| (One intermediate revision by one other user not shown) | |||
Line 1:
We are going to practice writing and running Python scripts.
===Start your text editor===
# Launch the Notepad++ text editor. See the [[Boston Python Workshop 3/Friday/Windows_text_editor|Windows text editor setup]] instructions for the steps to do this.
# Start a new, blank text file.
===Write and save a short Python script===
# 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.
===Run the script===
# Start a new command prompt. See the [[Boston Python Workshop 3/Friday/Windows terminal navigation|terminal navigation on Windows]] instructions for the steps to do this.
# Navigate to your Desktop directory from a command prompt, using the <code>dir</code> and <code>cd</code> commands. See the [[Boston Python Workshop 3/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===
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.
* When you run the <code>python</code> command with a file name as an argument, Python executes the Python code in that file.
[[Boston Python Workshop 3/Friday|« Back to the Friday setup page]]
| |||