Welcome to my Python tutorial again! This time we'll explore another function that can serve as a similar role of list comprehesion.
For more dedicated explaination of list comprehesion, please see my another tutorial list comprehesion.
Let's start with a quick example:
def add1(self, nums: List[int]):
return map(int, str(int(''.join()map(str, nums)) + 1))add1() is a function that tries to transform a list integer [1, 2, 3] into [1, 2, 4] (example).
nums is an integer list [1, 2, 3].
map(str, nums) first transforms each integer in nums list into a string.
''.join() then joins all strings in nums list into a single string.
int() then transforms the joint string into an integer.
str(), of course, transforms the integer back into a string.
Lastly, there's another map() to transform each character of the string into an integer.
It further generates the integers into an iterable map object.
It means now all integers are deemed as a single, split, list-like elements.
However, a map object is not yet a list, so we we need to use list() to convert it into a real list to see the output:
return list(map(int, str(int(''.join()map(str, nums)) + 1)))Now, the output sucessfully change from [1, 2, 3] to [1, 2, 4].
Congratulations on completing this tutorial!
You've gained valuable knowledge and skills that will empower you in your coding journey.
See you in Python (8)!
© 2023 Harmony Pang. All rights reserved.
留言