pythonpractice/lists.py at main · hasnainDevX/pythonpractice · GitHub

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# list1 = list()
# print(list1) # empty list

# list2 = list([1,2,3])
# print(list2) # [1, 2, 3]


# list3 = list(["red", "blue", "green"])
# print(list3) # ['red', 'blue', 'green']

# list = []
# print(list) # empty list

# list = [1,2,3]
# print(list) # [1, 2, 3]

# list = ["green", "red", "blue"]
# print(list) # ['green', 'red', 'blue']

# import random
# list1 = [2, 4, 6, 33, 78, 22]
# random.shuffle(list1)
# print(list1) # shuffled list1

# combineList = list2 + list3
# print(combineList) # [1, 2, 3, 'red', 'blue', 'green']

# lengthOfList1 = len(list1)
# print(lengthOfList1) # length of list1

# print(list1)

# print(list1[1]) # second element of list1
# print(list1[1:3]) # elements from index 1 to 2 of list1
# print(list1[-1:-4:-1]) # last three elements of list1 in reverse order
# print(list1[:4]) # first four elements of list1
# print(list1[2:]) # elements from index 2 to end of list1
# print(list1[:-2]) # all elements of list1 except last two
# print(list1[:]) # all elements of list1
# print(list1[::-1]) # all elements of list1 in reverse order

# List Methods
# newlist = list1.copy()
# print(newlist) # copy of list1
# newlist.append(99)
# print(newlist) # newlist after appending 99
# newlist.insert(2, 22)
# print(newlist) # newlist after inserting 22 at index 2
# newlist.insert(4, 44)
# print(newlist) # newlist after inserting 44 at index 4
# newlist.remove(22)
# print(newlist) # newlist after removing first occurrence of 22
# newlist.pop()
# print(newlist) # newlist after removing last element
# newlist.reverse()
# print(newlist) # newlist after reversing
# newlist.sort()
# print(newlist) # newlist after sorting in ascending order
# newlist.sort(reverse=True)
# print(newlist) #descending order
# newlist.clear()
# print(newlist)
# del newlist # delete the list compleletly means you have to define again

# def main():
#     x = 1
#     y = [1,2,3,4]
#     m(x,y)
#     print("x is ", x)
#     print("y[0] is ", y[0])

# def m(number, numbers):
#     number = 5555
#     numbers[0] = 22
# main()

# listx = [2,3,5,7,8]
# def reverse(listx):
#     reversedList = []
#     for i in listx:
#         reversedList.insert(0, i)
#     return reversedList
# print(reverse(listx))
# THAT ABOVE ONE WAS FKING HARD THO


def add(x, listx=[]):
    listx.append(x)
    return listx

add(1)
add(4)
print(add(5))

list1 = ["Hasnain", "Ali", "Hassan"]
print(list1.count("Ali"))

list2 = ["Hasnain", "Ali", "Hassan", "Ali"]
print(list2.index("Hasnain"))