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Python: Remove duplicate characters of a given string

Python String: Exercise-61 with Solution

Write a Python program to remove duplicate characters of a given string.

Sample Solution:-

Python Code:

from collections import OrderedDict
def remove_duplicate(str1):
  return "".join(OrderedDict.fromkeys(str1))
     
print(remove_duplicate("python exercises practice solution"))
print(remove_duplicate("w3resource"))

Sample Output:

python exrcisalu
w3resouc

Pictorial Presentation:

Python String: Remove duplicate characters of a given string.

Flowchart:

Flowchart: Remove duplicate characters of a given string

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Previous: Write a Python program to capitalize first and last letters of each word of a given string.
Next: Write a Python program to compute sum of digits of a given 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