SunFounder Thales Kit, Manual

Page: 137 / 167

SunFounder Thales Kit for Raspberry Pi Pico, Release 1.0
3.5.11 Lists
Lists are used to store multiple items in a single variable, and are created using square brackets:
B_list = [ "Blossom" , "Bubbles" , "Buttercup" ]
print (B_list)
List items are changeable, ordered, and allow duplicate values. The list items are indexed, with the first item having
index [0], the second item having index [1], and so on.
C_list = [ "Red" , "Blue" , "Green" , "Blue" ]
print (C_list) # duplicate
print (C_list[ 0 ])
print (C_list[ 1 ]) # ordered
C_list[ 2 ] = "Purple" # changeable
print (C_list)
>>> %Run -c $EDITOR_CONTENT
['Red', 'Blue', 'Green', 'Blue']
Red
Blue
['Red', 'Blue', 'Purple', 'Blue']
A list can contain different data types:
A_list = [ "Banana" , 255 , False , 3.14 ]
print (A_list)
>>> %Run -c $EDITOR_CONTENT
['Banana', 255, False, 3.14]
List Length
To determine how many items are in the list, use the len() function.
A_list = [ "Banana" , 255 , False , 3.14 ]
print ( len (A_list))
>>> %Run -c $EDITOR_CONTENT
4
Check List items
Print the second item of the list:
A_list = [ "Banana" , 255 , False , 3.14 ]
print
(A_list[ 1 ])
>>> %Run -c $EDITOR_CONTENT
[255]
Print the last one item of the list:
3.5. MicroPython Basic Syntax 133