How to use itertools.chain In Python
The itertools.chain function can be used to the create an iterator that chains the new element with the original list.
import itertools
my_list = [2, 3, 4]
my_list = list(itertools.chain([1], my_list))
print(my_list)
Output:
[1, 2, 3, 4]
Advantages:
- The Memory-efficient for the large lists as it avoids creating intermediate lists.
- Useful in the functional programming styles.
Disadvantages:
- The Slightly less intuitive than other methods.
- The Requires importing the itertools module.
Prepend Elements to Lists in Python
Prepending elements to a list in Python can be a common task in various programming scenarios. Although Python’s list type does not have a built-in method for the prepending elements several techniques can accomplish this. This article explores different methods for prepending elements to the lists in Python discusses their advantages and disadvantages and provides the best practices for efficient list manipulation.