Check Item in List :

thislist = ["apple", "banana", "cherry"]
if "apple" in thislist:                  # Check for existence
print("Yes, 'apple' is in the fruits list")

Output :

Replace Item by Index :

thislist = ["apple", "banana", "cherry"]
thislist[1] = "blackcurrant"             # Replace 'banana'
print(thislist)

Output :

Replace Range of Items :

thislist = ["apple", "banana", "cherry", "orange", "kiwi", "mango"]
thislist[1:3] = ["blackcurrant", "watermelon"]
print(thislist)

Output :

Insert Item at Index :

thislist = ["apple", "banana", "cherry"]
thislist.insert(2, "watermelon")
print(thislist)

Output :

Append Item :

thislist = ["apple", "banana", "cherry"]
thislist.append("orange")
print(thislist)

Output :

Extend List with Another List :

thislist = ["apple", "banana", "cherry"]
tropical = ["mango", "pineapple", "papaya"]
thislist.extend(tropical)
print(thislist)

Output :