This Python Tuples lesson is for a beginner. Read the short notes, run each example, then change one name or number and run it again.
A tuple is an ordered collection that you do not change after creating it. Parentheses are the usual spelling. A trailing comma makes a one-item tuple.
Use a tuple for a fixed pair, such as a coordinate or a row you only want to read.
Example 1: Start here
Trying to assign point[0] = 0 raises an error. That is the point of a tuple.
point = (13.08, 80.27) # a tuple; a fixed group of values
print(point[1])
lat, lng = point # unpack the values into these names
print(lat)
Example 2: A fixed pair
A tuple is an ordered group you read by index, like a list.
point = (10, 24) # a tuple; a fixed group of values
print(point[0], point[1]) # a comma prints each value, with a space between
Example 3: Unpack a tuple
Unpacking gives each item its own name.
city, seats = ("Chennai", 24) # a tuple; a fixed group of values
print(city, seats) # a comma prints each value, with a space between
Example 4: One item needs a comma
Without the comma, parentheses only group an expression. The comma makes a tuple.
single = ("Python",) # a tuple; a fixed group of values
print(type(single)) # type() shows what kind of value this is
print(len(single)) # len counts the items
Trying to assign point[0] = 0 raises an error. That is the point of a tuple.
