Change language

Python | Count the occurrence of all list items in a tuple

| |

Examples :

  Input:  tuple = (’a’,’ a’, ’c’,’ b’, ’d’ ) list = [’a’,’ b’]  Output:  3  Input:  tuple = (1, 2, 3, 1, 4, 6, 7, 1, 4) list = [1, 4, 7]  Output:  6 

Approach # 1: Naive Approach

First Approach — naive approach. Use a for loop and traverse the given list and count the occurrences of each element of the tuple in the list. Finally, return the score.

# Python3 Program for counting cases
# of all list items in tuple

from collections import Counter

 

def countOccurrence (tup, lst):

count = 0

for item in tup :

if item in lst:

  count + = 1

 

return count 

 
Driver code

tup = ( ’ a’ , ’a’ , ’c’ , ’ b’ , ’d’ )

lst = [ ’a’  , ’b’ ]

print (countOccurrence (tup, lst))

Exit :

 3 

Approach # 2 Using a counter
From in the Python Collections module, import the counter to solve this problem. Counter — it is a container that keeps track of how many times equivalent values ​​are added. After storing the result in & # 39; counts & # 39;, we use a for loop and count how many times each item in the list occurs in & # 39; counts & # 39; and sum it up to get the final result.

# Python3 Case Counting Program
# of all list items in a tuple

from collections import Counter

 

def countOccurrence (tup, lst):

  counts = Counter (tup)

return sum (counts [i] for i in lst)

 
Driver code

tup = ( ’a’ , ’ a ’ , ’ c’ , ’b’ , ’ d’ )

lst = [ ’a’ , ’ b’ ]

print (countOccurrence (tup, lst))

Exit:

 3 

Approach # 3. Using Set
Another method to solve this problem — using the given data structure. Just convert the given list into a set that removes all duplicates. Now, for each element of the list, count its occurrence in a tuple and sum them.

# Python3 Counting program
# of all list items in a tuple

 

def countOccurrence (tup, lst):

lst = set (lst)

return sum ( 1 for x in tup if x in lst)

  
Driver code

tup = ( ’a’ , ’a’ , ’ c’ , ’b’ , ’ d’ )

lst = [ ’a’ , ’ b’ ]

print (countOccurrence (tup, lst))

Exit :

 3 

Approach # 4 Used Python dictionary definition
Get each tuple element and its frequency as a key: value pair in the Python dictionary, then using a for loop, for each list element, count its occurrences in the tuple and sum them.

# Python3 Case Counting Program
# of all list items in a tuple

 

def countOccurrence (tup, lst):

dct = {}

for i in tup:

  if not dct.get (i):

dct [i] = 0

dct [i] + = 1

  return sum (dct.get (i, 0 ) for i in lst)

 
Driver code

tup = ( ’a’ , ’ a’  , ’c’ , ’ b’ , ’d’ )

lst = [ ’a’ , ’ b’ ]

print (countOccurrence (tup, lst))

Exit :

 3 

Approach # 5 : Python numpy.in1d ​​()
Python numpy gives us a direct method to find a solution to a given problem, and this is numpy.in1d ​​() . This method checks if each element of the one-dimensional array is present in the second array. Since the list is also a one-dimensional array, this method can be applied here.

# Python3 Case Counting Program
# of all list items in a tuple

import numpy as np

 

def countOccurrence (tup , lst):

return np .in1d ​​(tup, lst). sum ()

 
Driver code

tup = ( ’a’ , < / code> ’a’ , ’ c’ , ’b’ , ’ d’

lst = [ ’a’ , ’ b’ ]

print (countOccurrence (tup, lst))

Exit:

 3 

Shop

Learn programming in R: courses

$

Best Python online courses for 2022

$

Best laptop for Fortnite

$

Best laptop for Excel

$

Best laptop for Solidworks

$

Best laptop for Roblox

$

Best computer for crypto mining

$

Best laptop for Sims 4

$

Latest questions

NUMPYNUMPY

Common xlabel/ylabel for matplotlib subplots

12 answers

NUMPYNUMPY

How to specify multiple return types using type-hints

12 answers

NUMPYNUMPY

Why do I get "Pickle - EOFError: Ran out of input" reading an empty file?

12 answers

NUMPYNUMPY

Flake8: Ignore specific warning for entire file

12 answers

NUMPYNUMPY

glob exclude pattern

12 answers

NUMPYNUMPY

How to avoid HTTP error 429 (Too Many Requests) python

12 answers

NUMPYNUMPY

Python CSV error: line contains NULL byte

12 answers

NUMPYNUMPY

csv.Error: iterator should return strings, not bytes

12 answers

News


Wiki

Python | How to copy data from one Excel sheet to another

Common xlabel/ylabel for matplotlib subplots

Check if one list is a subset of another in Python

sin

How to specify multiple return types using type-hints

exp

Printing words vertically in Python

exp

Python Extract words from a given string

Cyclic redundancy check in Python

Finding mean, median, mode in Python without libraries

cos

Python add suffix / add prefix to strings in a list

Why do I get "Pickle - EOFError: Ran out of input" reading an empty file?

Python - Move item to the end of the list

Python - Print list vertically