Dicts and Loops

Lesson

To loop over a dictionary, use the in keyword. This will loop over the keys one at a time. The values can be accessed with the keys:

student = {"name": "Tom", "age": 17, "height": 68}

for key in student:
  print(f"{key}: {student[key]}")

# name: Tom
# age: 17
# height: 68

There are a few dictionary methods that provide more flexibility when looping over a dictionary.

.keys() returns a list of the keys:

for key in student.keys():
  print(key)

# name
# age
# height

.values() returns a list of the values:

for value in student.values():
  print(value)

# Tom
# 17
# 68

.items() returns both keys and their values, which can be accessed by using two loop variables separated by a comma:

for key, value in student.items():
  print(f"{key}: {value}")

# name: Tom
# age: 17
# height: 68

Print the name of each student on a separate line. Do NOT use .keys().

scores = {"Alice": 98, "Bob": 77, "Charlie": 85}

Your code

Print the name of each student on a separate line. Use .keys().

scores = {"Alice": 98, "Bob": 77, "Charlie": 85}

Your code

Print the score of each student on a separate line. Use .values().

scores = {"Alice": 98, "Bob": 77, "Charlie": 85}

Your code

Write the start of the loop to print the name and score of each student.

scores = {"Alice": 98, "Bob": 77, "Charlie": 85}
# start of loop here
  print(f"{name} scored {score}")

Your code

Write the body of the loop to print the name and score of each student, like in the previous exercise.

scores = {"Alice": 98, "Bob": 77, "Charlie": 85}
for name in scores:
  # print name and score here

Your code