This Python Keywords lesson is for a beginner. Read the short notes, run each example, then change one name or number and run it again.
Keywords are reserved. You cannot use them as variable names.
keyword.kwlist is the current list. It changes a little between Python versions.
Example 1: Start here
True, False, and None are keywords. They are not ordinary names.
import keyword # load a tool that comes with Python
print("for" in keyword.kwlist) # in is True when the value is found
print("score" in keyword.kwlist) # in is True when the value is found
Example 2: Store the idea in a name
Python Keywords begins with a value you can point at. The name topic holds that text.
topic = "Python Keywords" # text
print(topic)
Example 3: Check it with if
An if chooses one branch. Change the score and run it again to see the other message.
score = 14 # a whole number
if score >= 80: # run the indented lines only when this is true
print("Pass")
else: # runs when the test above was false
print("Try again")
Example 4: Repeat with a loop
A for loop runs the indented line once per step. The numbers 1, 2, and 3 are printed on their own lines.
for step in range(1, 4): # repeat once per number; range stops before the last
print("Step", step) # a comma prints each value, with a space between
True, False, and None are keywords. They are not ordinary names.
