Frequently Asked Python Program 15: Count Occurrences of an element in a list

Topic : Count Occurrences of an element in a list

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[LilMizzCheeky]

I have been searching for this exact video for hours this has helped me so much!!!

[sumanpalisetty]

I don't want to assign a value of x to be counted, i want a program which automatically counts all the occurances

[VIPINKUMAR-hcsz]

How we will print the index value of the given number.(If we would like to print the last index occurrence of the given number in the list, what modification we should do in the above described code?) Please reply.

[buppergudemsowmya]

Which method tells the no. of objects stored in object of particular type

[MrKaisuTech]

what if we are supposed to count duplicates in a list entered by user 'n' times

[kvelez]

def count(arr, i, dictionary):
if i >= len(arr):
return dictionary
if arr[i] in dictionary:
dictionary[arr[i]] += 1
else:
dictionary[arr[i]] = 1
return count(arr, i+1, dictionary)
print(count([1, 1, 2, 3, 4, 5, 1], 0, {}))

[kvelez]

def count(arr, i, dictionary):
if i >= len(arr):
return dictionary
if arr[i] in dictionary:
dictionary[arr[i]] += 1
else:
dictionary[arr[i]] = 1
return count(arr, i+1, dictionary)
print(count(["hello", "world"], 0, {}))

[equilibrium]

how do i ascend or descend it from collection library?

[planet_of_funtech]

What if count of two numbers are equal? How to solve that one?

[adibabelayete]

how to count the number of occurrences of the second parameter within the first parameter string? like - number of occurrences "iss" string in "mississippi".thanks

[VIPINKUMAR-hcsz]

my_list = [10, 15, 25, 10, 35, 45, 10, 5, 2, 4, 1]
x = 10
length = len(my_list)
count =0
for i in range(length):
if my_list[i] ==x:
a = i
print(a)

Please check, is this correct to find the last occurrence

[SurajPatil-whjt]

Thank you Sir.By using loop method, it is giving output multiple times like "10 has occurred 3 times".This statement repeats multiple times.Any Reason ?

[Braven]

Thank you! But can you explain please how to count ALL elements so it will look like:
10 - 2
5 - 1
6 - 1
etc..

[sandeeprn]

write a python programme to check the given list is having first value as integer or not using if else statement. Anyone help me with that 😁

[Bmenthuperson]

Sir I only want the frequency not the character 😭😭