PYTHON

how to find last index of list in python

# Use an Index of -1
l = [1,2,3,4]
print(l[-1])
# Returns 4

last index in python

# using rindex() 
test_string = "abcabcabc"
# using rindex() 
# to get last element occurrence 
res = test_string.rindex('c')  
# printing result 
print ("The index of last element occurrence: " + str(res))

OUTPUT:
  The index of last element occurrence: 8

lastindexof python

# using rindex() 
test_string = "abcabcabc"
  
# using rindex() 
# to get last element occurrence 
res = test_string.rindex('c')   
# printing result 
print ("The index of last element occurrence: " + str(res))

OUTPUT:
  The index of last element occurrence: 8

indexing python first and last

l = [1,2,3,4,5]
l[::len(l)-1]

python last index of item in list

def list_rindex(li, x):
    for i in reversed(range(len(li))):
        if li[i] == x:
            return i
    raise ValueError("{} is not in list".format(x))

index of and last index of in python

# To get first and last index of list or string
list_a = [1,2,3,4]
first_index = list_a[0] # 1
last_index = list_a[-1] # 4
str_a = "abc"
first_index_str = str_a[0] # a
last_index_str = str_a[-1] # c

# To find first and last index of char in string
str_b = "abcabcdec"
first_index_of_c = str_b.index("c") # 2
last_index_of_c = str_b.rindex("c") # 8

2nd to last index python

# python code to get 2nd to last item in a list
my_list = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
print(my_list[-2])

2nd to last index python

lst[-2]