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Python: Count repeated characters in a string

Python String: Exercise-42 with Solution

Write a python program to count repeated characters in a string.

Python String Exercises: Count repeated characters in a string

Sample Solution:-

Python Code:

import collections
str1 = 'thequickbrownfoxjumpsoverthelazydog'
d = collections.defaultdict(int)
for c in str1:
    d[c] += 1

for c in sorted(d, key=d.get, reverse=True):
  if d[c] > 1:
      print('%s %d' % (c, d[c]))

Sample Output:

o 4                                                                                                           
e 3                                                                                                           
h 2                                                                                                           
t 2                                                                                                           
r 2                                                                                                           
u 2                             

Flowchart:

Flowchart: Count repeated characters in a string

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Python Code Editor:

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m