Python Loop Through Dictionaries
The purpose of today’s session is to discuss Python loop through dictionary with examples in order to satisfy the learning goals.
Python Loop Through Dictionary
Using a for loop, you can iterate through a dictionary in Python using dictionaries.
The keys of a dictionary are returned when iterating through it, but the values can also be returned.
Table Of Content-
In order, print all key names in the dictionary:
Example:
footballer_bio_dict = {
"full name": "Lionel Andres Messi",
"Place of birth": "Rosario, Santa Fe, Argentina",
"height": "1.70 m (5 ft 7 in)",
"position": "Forward",
"first club": "FC Barcelona",
"world cups": 1
}
for a in footballer_bio_dict:
print(a)
Print all keys in the dictionary, one by one:
Example:
footballer2_bio_dict = {
"full name": "Cristiano Ronaldo",
"Place of birth": "Funchal, Madeira, Portugal",
"height": "1.87 m (6 ft 2 in)",
"position": "Forward",
"first club": "Sporting CP",
"world cups": 0
}
for a in footballer2_bio_dict:
print(a)
In order, print all values names in the dictionary:
Example:
footballer_bio_dict = {
"full name": "Lionel Andres Messi",
"Place of birth": "Rosario, Santa Fe, Argentina",
"height": "1.70 m (5 ft 7 in)",
"position": "Forward",
"first club": "FC Barcelona",
"world cups": 1
}
for a in footballer_bio_dict:
print(footballer_bio_dict[a])
Another Example:
footballer2_bio_dict = {
"full name": "Cristiano Ronaldo",
"Place of birth": "Funchal, Madeira, Portugal",
"height": "1.87 m (6 ft 2 in)",
"position": "Forward",
"first club": "Sporting CP",
"world cups": 0
}
for a in footballer2_bio_dict:
print(footballer2_bio_dict[a])
It’s also possible to return the values of a dictionary with the values() method:
Example:
footballer_bio_dict = {
"full name": "Lionel Andres Messi",
"Place of birth": "Rosario, Santa Fe, Argentina",
"height": "1.70 m (5 ft 7 in)",
"position": "Forward",
"first club": "FC Barcelona",
"world cups": 1
}
for a in footballer_bio_dict.values():
print(a)
Again return the values of a dictionary with the values() method:
Another Example:
footballer2_bio_dict = {
"full name": "Cristiano Ronaldo",
"Place of birth": "Funchal, Madeira, Portugal",
"height": "1.87 m (6 ft 2 in)",
"position": "Forward",
"first club": "Sporting CP",
"world cups": 0
}
for a in footballer2_bio_dict.values():
print(a)
It’s also possible to return the keys of a dictionary with the keys() method:
Example:
footballer_bio_dict = {
"full name": "Lionel Andres Messi",
"Place of birth": "Rosario, Santa Fe, Argentina",
"height": "1.70 m (5 ft 7 in)",
"position": "Forward",
"first club": "FC Barcelona",
"world cups": 1
}
for a in footballer_bio_dict.keys():
print(a)
Another Example:
footballer2_bio_dict = {
"full name": "Cristiano Ronaldo",
"Place of birth": "Funchal, Madeira, Portugal",
"height": "1.87 m (6 ft 2 in)",
"position": "Forward",
"first club": "Sporting CP",
"world cups": 0
}
for a in footballer2_bio_dict.keys():
print(a)
Using the items() method, iterate through both keys and values:
Example:
footballer_bio_dict = {
"full name": "Lionel Andres Messi",
"Place of birth": "Rosario, Santa Fe, Argentina",
"height": "1.70 m (5 ft 7 in)",
"position": "Forward",
"first club": "FC Barcelona",
"world cups": 1
}
for a, b in footballer_bio_dict.items():
print(a, b)
Another Example:
footballer2_bio_dict = {
"full name": "Cristiano Ronaldo",
"Place of birth": "Funchal, Madeira, Portugal",
"height": "1.87 m (6 ft 2 in)",
"position": "Forward",
"first club": "Sporting CP",
"world cups": 0
}
for a, b in footballer2_bio_dict.items():
print(a, b)
Python Loop-Dictionary Importance
Using loops with dictionaries in Python is important for several reasons:
- Loops allow you to iterate over the key-value pairs in a dictionary. This enables you to process or manipulate each item individually, accessing both the keys and values. It provides a convenient way to perform operations on the data stored in the dictionary.
- Loops with dictionaries are commonly used for data processing tasks. You can use loops to perform calculations, filtering, sorting, or any other operation on the dictionary data. This allows you to transform or extract information from the dictionary based on your specific requirements.
- Loops allow you to apply conditional logic when iterating over dictionary items. You can use if statements or other conditional constructs within the loop to selectively process or filter items based on certain conditions. This flexibility enables you to perform different actions depending on the values or keys in the dictionary.
- Loops are useful when working with dynamic data in dictionaries. As dictionaries can be modified, loops allow you to handle additions, updates, or deletions of dictionary items during the iteration process. This is important for scenarios where the dictionary is being modified while being processed.
- Loops with dictionaries are valuable for data analysis and aggregation tasks. You can use loops to iterate over the dictionary items, extract relevant information, and perform calculations or aggregations. This is particularly useful when you want to summarize or analyze data stored in the dictionary.
To show your appreciation or offer suggestions for improvement, please leave your reaction below.
We value your feedback.
+1
+1
+1
+1
+1
+1
+1
