How to Iterate Over Dictionary Items in Python Easily

To iterate over dictionary items in Python, use the items() method with a for loop like for key, value in dict.items():. This lets you access each key and its corresponding value in the dictionary.

Syntax

The basic syntax to loop over dictionary items is:

• dict.items(): Returns pairs of keys and values.
• for key, value in dict.items():: Loops through each key-value pair.

python

for key, value in my_dict.items():
    # use key and value here

Example

This example shows how to print each key and value from a dictionary using items().

python

my_dict = {'apple': 3, 'banana': 5, 'orange': 2}
for key, value in my_dict.items():
    print(f"{key}: {value}")

Output

apple: 3
banana: 5
orange: 2

Common Pitfalls

One common mistake is trying to loop over the dictionary directly to get keys and values together, which only gives keys.

Wrong way:

for item in my_dict:
    print(item)

This prints only keys, not values.

Right way:

for key, value in my_dict.items():
    print(key, value)

python

my_dict = {'a': 1, 'b': 2}

# Wrong way - prints only keys
for item in my_dict:
    print(item)

# Right way - prints keys and values
for key, value in my_dict.items():
    print(key, value)

Output

a
b
a 1
b 2

Quick Reference

Remember these tips when iterating dictionary items:

• Use dict.items() to get key-value pairs.
• Unpack pairs in the loop as for key, value in dict.items():.
• Looping directly over the dictionary gives only keys.

Key Takeaways

Use dict.items() to get both keys and values when looping.

Unpack key and value in the loop like for key, value in dict.items():.

Looping directly over a dictionary only gives keys, not values.

Always use items() when you need both parts of the dictionary.

This method works for all Python versions 3.x and above.