MicroPython on Raspberry Pi Pico provides several data structures for storing and manipulating data. These include lists, tuples, sets, and dictionaries. Loops are a powerful tool for iterating over these data structures and performing operations on their elements.
Let’s take a look at some examples of how loops can be used to iterate over data structures in MicroPython.
- Iterating over a List
A list is a collection of items, and we can iterate over it using a for loop. Here’s an example:
# Create a list of numbers
numbers = [1, 2, 3, 4, 5]
# Iterate over the list and print each number
for number in numbers:
print(number)In this example, we create a list of numbers and then iterate over it using a for loop. For each number in the list, we print it to the console.
- Iterating over a Tuple
A tuple is similar to a list, but it is immutable, which means it cannot be modified once it is created. Here’s an example of how to iterate over a tuple using a for loop:
# Create a tuple of fruits
fruits = ('apple', 'banana', 'cherry')
# Iterate over the tuple and print each fruit
for fruit in fruits:
print(fruit)In this example, we create a tuple of fruits and then iterate over it using a for loop. For each fruit in the tuple, we print it to the console.
- Iterating over a Set
A set is an unordered collection of unique items. We can iterate over a set using a for loop just like we do with lists and tuples. Here’s an example:
# Create a set of colors
colors = {'red', 'green', 'blue'}
# Iterate over the set and print each color
for color in colors:
print(color)In this example, we create a set of colors and then iterate over it using a for loop. For each color in the set, we print it to the console.
- Iterating over a Dictionary
A dictionary is a collection of key-value pairs. We can iterate over a dictionary using a for loop, but we need to use the items() method to access both the keys and values. Here’s an example:
# Create a dictionary of students and their grades
grades = {'Alice': 85, 'Bob': 90, 'Charlie': 95}
# Iterate over the dictionary and print each student and their grade
for student, grade in grades.items():
print(f'{student}: {grade}')In this example, we create a dictionary of students and their grades and then iterate over it using a for loop. For each student and their corresponding grade, we print them to the console.
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