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Python: Remove all consecutive duplicates of a given string

Python String: Exercise-67 with Solution

Write a Python program to remove all consecutive duplicates of a given string.

Sample Solution - 1:

Python Code:

from itertools import groupby 
def remove_all_consecutive(str1): 
	result_str = [] 
	for (key,group) in groupby(str1): 
		result_str.append(key) 

	return ''.join(result_str)
	
str1 = 'xxxxxyyyyy'
print("Original string:" + str1)
print("After removing consecutive duplicates: " + str1)
print(remove_all_consecutive(str1))

Sample Output:

Original string:xxxxxyyyyy
After removing consecutive duplicates: xxxxxyyyyy
xy

Pictorial Presentation:

Python String: Remove all consecutive duplicates of a given string.

Flowchart:

Flowchart: Remove all consecutive duplicates of a given string

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:

Sample Solution - 2:

Python Code:

import itertools
def remove_consecutive_duplicates(s1):
     return (''.join(i for i, _ in itertools.groupby(s1)))

s1= "aabcdaee"
print("Original String: ",s1)
print("\nRemoving all consecutive duplicates:")
print(remove_consecutive_duplicates(s1))

Sample Output:

Original String:  aabcdaee

Removing all consecutive duplicates:
abcdae

Pictorial Presentation:

Python String: Remove all consecutive duplicates of a given string.

Flowchart:

Flowchart: Remove all consecutive duplicates of a given string

Python Code Editor:

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Previous: Write a Python program to make two given strings (lower case, may or may not be of the same length) anagrams removing any characters from any of the strings.
Next: Write a Python program to create two strings from a given string. Create the first string using those character which occurs only once and create the second string which consists of multi-time occurring characters in the said string.

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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