Enumerate, Zip, Sorted, Items, Iteritems built-in functions in Python
Python provides several built-in functions for manipulating data, and in this blog post, we will explore some of the most common functions used for iteration and sorting. These functions are:
Enumerate
Zip
Sorted
Items
Iteritems
The enumerate function is used to loop over a sequence while keeping track of the index of each item. It returns a tuple of the index and the item, which can be unpacked and used inside the loop. Here is an example:
fruits = ['apple', 'banana', 'orange']
for index, fruit in enumerate(fruits):
print(index, fruit)
In this example, we used enumerate to loop over a list of fruits and print the index and the fruit name to the console. The output will be:
0 apple
1 banana
2 orange
- Zip
The zip function is used to combine two or more sequences into a single sequence of tuples. It returns an iterator that can be looped over or converted to a list. Here is an example:
numbers = [1, 2, 3]
letters = ['a', 'b', 'c']
for num, letter in zip(numbers, letters):
print(num, letter)
In this example, we used zip to combine two lists of numbers and letters into a sequence of tuples. The output will be:
1 a
2 b
3 c
- Sorted
The sorted function is used to sort a sequence of items in ascending order. It returns a new sorted list and does not modify the original list. Here is an example:
numbers = [3, 1, 4, 1, 5, 9, 2, 6, 5]
sorted_numbers = sorted(numbers)
print(sorted_numbers)
In this example, we used sorted to sort a list of numbers in ascending order. The output will be:
[1, 1, 2, 3, 4, 5, 5, 6, 9]
- Items
The items function is used to loop over the key-value pairs in a dictionary. It returns a sequence of tuples where each tuple contains a key and its corresponding value. Here is an example:
my_dict = {'apple': 3, 'banana': 2, 'orange': 1}
for fruit, quantity in my_dict.items():
print(fruit, quantity)
In this example, we used items to loop over a dictionary of fruits and their quantities. The output will be:
apple 3
banana 2
orange 1
- Iteritems
The iteritems function is used to loop over the key-value pairs in a dictionary. It returns an iterator that can be looped over or converted to a list. Here is an example:
my_dict = {'apple': 3, 'banana': 2, 'orange': 1}
for fruit, quantity in my_dict.iteritems():
print(fruit, quantity)
In this example, we used iteritems to loop over a dictionary of fruits and their quantities. The output will be the same as the items example above.
Conclusion
In conclusion, Python provides several built-in functions for iterating over data and sorting it. The enumerate function is used to loop over a sequence while keeping track of the index of each item. The zip function is used to combine two or more sequences into a single sequence of tuples.
Happy Learning!! Happy Coding!!
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