Python Program to Count the Number of Occurrence of Key-Value Pair in a Text File

Given a text file that contains the key-Value pair as data the task is to print the Count of each key-value pair using Python.

Program to Count the Number of Occurrence of Key-Value Pair in a Text File in Python

Approach:

Import the Counter from the collections module using the import keyword.
Make a single variable to store the path of the file. This is a constant value. This value must be replaced with the file path from your own system in the example below.
Take an empty list to store all the words.
Open the file in read-only mode. In this case, we’re simply reading the contents of the file.
Iterate through the lines of the file using the For loop.
Remove the newline character (\n) using strip() function and store it in a variable.
Inside the For loop append each key-value pair to list using the append() function.
Get the frequency of all the key-value pairs using the Counter() function and store it in a variable(of type dictionary).
Traverse in the frequency dictionary using the For loop.
Print its corresponding key(frequency).

Below is the implementation:

# import the Counter from collections module using the import keyword
from collections import Counter
# Make a single variable to store the path of the file. This is a constant value.
# This value must be replaced with the file path from your own system in the example below.
givenFilename = "samplefile.txt"
# Take a empty list to store all the words
l = []
print('The Count of frequency of each key-value pair is :')
# Open the file in read-only mode. In this case, we're simply reading the contents of the file.
with open(givenFilename, 'r') as givenfilecontent:
    # Iterate through the lines of the file using the For loop.
    for gvnfileline in givenfilecontent:
        # Remove the newline character (\n) using strip() function and store it in a variable.
        keyval = gvnfileline.strip('\n')
        # Inside the For loop append each key-value pair to list using the append() function.
        l.append(keyval)
# Get frequency of all the words using the Counter() function and store it in a variable(of type dictionary)
freqword = Counter(l)
# Traverse in the frequency dictionary using the For loop
for key in freqword:
  # print its corresponding key(frequency)
    print(key, '->', freqword[key])

Output:

The Count of frequency of each key-value pair is :
btechgeeks:500 -> 3
hello:200 -> 2
good:900 -> 1

Samplefile.txt:

btechgeeks:500
hello:200
hello:200
good:900
btechgeeks:500
btechgeeks:500

Explanation:

The file path is stored in the variable ‘file name.’ Change the value of this variable to the path of your own file.
Dragging and dropping a file onto the terminal will show its path. The code will not run unless you change the value of this variable.
The file will be opened in reading mode. Use the open() function to open a file. The path to the file is the method’s first parameter, and the mode to open the file is the method’s second parameter.
When we open the file, we use the character ‘r’ to signify read-mode.
strip() function removes the newline character.
We apply the Counter() function to get the frequency of all the key-value pairs of the given text file.

Sample Implementation in google colab:

Program to Count the Number of Occurrence of Key-Value Pair in a Text File in Python

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