Nested for loops : for « Statement « Python Tutorial

items = ["aaa", 111, (4, 5), 2.01]        # A set of objects
tests = [(4, 5), 3.14]                    # Keys to search for

for key in tests:                         # For all keys
    for item in items:                    # For all items
        if item == key:                   # Check for match
            print key, "was found" 
            break 
    else: 
        print key, "not found!"

3.3.for
	3.3.1.	for Loops
	3.3.2.	break from for loop
	3.3.3.	Iterating List with for Loops
	3.3.4.	Iterating Through a Dictionary
	3.3.5.	for Loop and the range() Built-in Function
	3.3.6.	Counter-controlled repetition with the for structure and range function.
	3.3.7.	Summation with for.
	3.3.8.	Nested for loops
	3.3.9.	Calculating compound interest.
	3.3.10.	Using the break statement in a for structure.
	3.3.11.	Using the break statement to avoid repeating code in the class-average program.
	3.3.12.	Using the continue statement in a for/in structure.