list

Function of List

• sort(): Sorts the list in ascending order.
• type(list): It returns the class type of an object.
• append(): Adds one element to a list.
• extend(): Adds multiple elements to a list.
• index(): Returns the first appearance of a particular value.
• max(list): It returns an item from the list with a max value.
• min(list): It returns an item from the list with a min value.
• len(list): It gives the overall length of the list.
• clear(): Removes all the elements from the list.
• insert(): Adds a component at the required position.
• count(): Returns the number of elements with the required value.
• pop(): Removes the element at the required position.
• remove(): Removes the primary item with the desired value.
• reverse(): Reverses the order of the list.
• copy(): Returns a duplicate of the list.

특정 값의 인덱스 찾기

list_a = [1, 1, 1, 2, 3, 4, 5, 6]
print(list_a.index(1))

정렬

array.sort(key = lambda x:x[0])
print(array)
>>>>> [[30, 'banana'], [50, 'apple'], [400, 'melon']]

#기준이 여러 개일 경우
lst.sort(key = lambda x: (-x[1], x[2], -x[3], x[0]))

count values