Iterating over dictionaries using 'for' loops

To iterate over a dictionary using a for loop, you can use the .items() method to get a list of the dictionary's keys and values, and then iterate over that list. Here is an example:

d = {'a': 1, 'b': 2, 'c': 3}
for key, value in d.items():
    print(key, value)

This will output:

a 1
b 2
c 3

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You can also use the .keys() method to iterate just over the keys or the .values() method to iterate just over the values. Here is an example using .keys():

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

This will output:

a
b
c

And here is an example using .values():

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

This will output:

1
2
3