Python: Count the number of each character of a given text of a text file

Python Basic - 1: Exercise-7 with Solution

Write a Python program to count the number of each character of a given text of a text file.

abc.txt -
German Unity Day
From Wikipedia, the free encyclopedia
The Day of German Unity (German: Tag der DeutschenEinheit) is the national day of Germany, celebrated on 3 October as a public holiday. It commemorates the anniversary of German reunification in 1990, when the goal of a united Germany that originated in the middle of the 19th century, was fulfilled again. Therefore, the name addresses neither the re-union nor the union, but the unity of Germany. The Day of German Unity on 3 October has been the German national holiday since 1990, when the reunification was formally completed.

Sample Solution:

Python Code :

import collections
import pprint
file_input = input('File Name: ')
with open(file_input, 'r') as info:
  count = collections.Counter(info.read().upper())
  value = pprint.pformat(count)

Sample Output:

File Name:  abc.txt
Counter({' ': 93,
         'E': 64,
         'N': 45,
         'A': 42,
         'T': 40,
         'I': 36,
         'O': 31,
         'R': 29,
         'H': 25,
         'D': 19,
         'M': 17,
         'Y': 17,
         'L': 15,
         'F': 15,
         'U': 14,
         'C': 13,
         'G': 13,
         'S': 12,
         ',': 7,
         'B': 6,
         'W': 5,
         '9': 5,
         '.': 4,
         'P': 4,
         '1': 3,
         '\n': 2,
         '0': 2,
         '3': 2,
         ':': 1,
         '-': 1,
         'K': 1,
         '(': 1,
         ')': 1,
         'V': 1})


Flowchart: Python - Count the number of each character of a  text file

Python Code Editor :


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Python: Tips of the Day

Iterating over dictionaries using 'for' loops:

I am a bit puzzled by the following code: d = {'x': 1, 'y': 2, 'z': 3} for key in d: print key, 'corresponds to', d[key] What I don't understand is the key portion. How does Python recognize ...

key is just a variable name.

for key in d:

For Python 3.x:

for key, value in d.items():

For Python 2.x:

for key, value in d.iteritems():

To test for yourself, change the word key to poop.

In Python 3.x, iteritems() was replaced with simply items(), which returns a set-like view backed by the dict, like iteritems() but even better. This is also available in 2.7 as viewitems().

The operation items() will work for both 2 and 3, but in 2 it will return a list of the dictionary's (key, value) pairs, which will not reflect changes to the dict that happen after the items() call. If you want the 2.x behavior in 3.x, you can call list(d.items()).

Ref: https://bit.ly/37dm0Qo