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index of and last index of in python

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Sad Santa answered on March 23, 2020 Popularity 9/10 Helpfulness 2/10

answer index of and last index of in python

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index of and last index of in python

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# 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

Popularity 9/10 Helpfulness 2/10 Language python

Source: Grepper

Tags: python

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Contributed on Jun 14 2022

Sad Santa

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how to find last index of list in python

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

Popularity 10/10 Helpfulness 4/10 Language python

Source: Grepper

Tags: find

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Contributed on Jul 04 2020

PythonBoy2020

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last index in python

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# 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

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Source: Grepper

Tags: python py

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Contributed on Jun 09 2020

asta p

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indexing python first and last

Comment

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

Popularity 9/10 Helpfulness 4/10 Language python

Source: Grepper

Tags: indexing indexin

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Contributed on Mar 23 2020

Sleepy Shark

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lastindexof python

Comment

-1

# 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

Popularity 9/10 Helpfulness 2/10 Language python

Source: Grepper

Tags: lastindexof last

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Contributed on Jun 09 2020

asta p

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python last index of item in list

Comment

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))

Popularity 10/10 Helpfulness 2/10 Language python

Source: stackoverflow.com

Tags: list

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Contributed on Apr 19 2020

Homely Hippopotamus

0 Answers Avg Quality 2/10

index of and last index of in python

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