You might have guessed that programmers don’t actually re-type everything every time the computer loads. There must be a way for a programmer to save the instructions we’ve been typing into the interpreter and run them later.
While other languages have more involved setup, the steps for creating and running a Python script (a small program) are:
save the commands as a plain text file to the hard-disk
run the plain-text file using python from the command line
Creating a Script¶
In Idle or Pyscripter create a new file with the content:
and save that to your home directory (H:) as helloworld.py.
If you are using Python 2, the content should be:
print "Hello, World!"
Getting to the Command Prompt¶
We’ll use the PowerShell environment from Microsoft as our command line.
Press and hold the “Windows” key, and hit the “R” key
a dialog will appear from which you can run commands
Type powershell <enter>
You should see a command prompt
Change directory to your home directory
PS c:\Users\mcfletch> h: PS h:\somewhere> cd \ PS h:\>
If you list the directory you should see your Python script
PS h:\> dir
and we can try to run it with:
PS h:\> python helloworld.py Hello, World!