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Python String translate() Method

Last Updated : 16 Jun, 2023
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Python String translate() returns a string that is a modified string of givens string according to given translation mappings. 

What is translate() in Python?

translate() is a built-in method in Python that is used to replace specific characters in a string with other characters or remove them altogether. The translate() method requires a translation table that maps the characters to be replaced to their replacements. This table can be generated using the maketrans() method, which takes two arguments: the characters to be replaced and their replacements.

Python String translate() Syntax

str.translate(translation_table)

Example:

In the given example, we are using str.translate() method is used to translate a string by specifying a mapping using ASCII values.

Python3




# specifying the mapping using ASCII 
translation = {103: None, 101: None, 101: None}
 
string = "geeks"
 
# translate string
print("Translated string:",
       string.translate(translation))
 






                        










Output: 


Translated string: ks


Python String translate() Examples 


There are two ways to translate are:


    

  • Python String translate() with mapping as a dictionary.
    • 

  • Mapping using maketrans().
    • 



Translation/Mapping with translate() with manual translation table


In this example, we are going to see how to use Python string translate() methods with a dictionary.






Python3















                                    




                                    

                                    




                                    




                                    

                                    

                                    
                                




















# Python3 code to demonstrate 


# translations without 


# maketrans() 


 


# specifying the mapping 


# using ASCII 


table = { 119 : 103, 121 : 102, 117 : None } 


 


# target string 


trg = "weeksyourweeks"


 


# Printing original string 


print ("The string before translating is : ", end ="") 


print (trg) 


 


# using translate() to make translations. 


print ("The string after translating is : ", end ="") 


print (trg.translate(table))



















                        







                        










Output :


The string before translating is : weeksyourweeks
The string after translating is : geeksforgeeks


Translation/Mapping using a translation table with translate()


In the given example, the vowels are replaced with digits with the use of maketrans() and translate() in Python.






Python3















                                    




                                    

                                    




                                    




                                    

                                    

                                    
                                




















# Define the translation table


table = str.maketrans('aeiou', '12345')


 


# Apply the translation to a string


text = 'this is a test'


translated_text = text.translate(table)


 


print(translated_text)  # 'th3s 3s 1 t2st'



















                        







                        










Output :


th3s 3s 1 t2st


Python maketrans()


The maketrans() method is a built-in string method in Python that generates a translation table. It is primarily used in conjunction with the translate() method to perform character-by-character translations or deletions.


Python maketrans() Syntax




Syntax: maketrans(str1, str2, str3) 


Parameters: 


    

  • str1: Specifies the list of characters that need to be replaced. 
    • 

  • str2: Specifies the list of characters with which the characters need to be replaced. 
    • 

  • str3: Specifies the list of characters that need to be deleted.
    • 



Returns: Returns the translation table which specifies the conversions that can be used by translate()




Example:


In this code, we are demonstrating how to use str.translate() with a translation table created using string.maketrans() to modify a string by replacing and deleting specific characters.






Python3















                                    




                                    

                                    




                                    




                                    

                                    

                                    
                                




















# Python 3 Program to show working


# of translate() method


 


# First String


firstString = "gef"


 


# Second String


secondString = "eks"


 


# Third String


thirdString = "ge"


 


# Original String


string = "geeks"


print("Original string:", string)


 


translation = string.maketrans(firstString, 


                               secondString, 


                               thirdString)


 


# Translated String


print("Translated string:", 


       string.translate(translation))



















                        







                        










Output : 


Original string: geeks
Translated string: ks


Use case of translate() and maketrans() Method


Remove Vowels from a String


In the given example, we are using the Maketrans() and translate()  to remove the vowels in the string in Python.






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text = "Hello, world!"


vowels = "aeiouAEIOU"


table = str.maketrans("", "", vowels)


translated_text = text.translate(table)


 


print(translated_text) # Output: "Hll, wrld!"



















                        







                        










Output:


Hll, wrld!


Remove Punctuation from a String


In the given example, we are using the Maketrans() and translate()  to remove the punctuation mark in the string in Python.






Python3















                                    




                                    

                                    




                                    




                                    

                                    

                                    
                                




















import string


 


text = "Hello, world! This is a test."


table = str.maketrans("", "", string.punctuation)


translated_text = text.translate(table)


 


print(translated_text) # Output: "Hello world This is a test"



















                        







                        










Output:


Hello world This is a test




                                    


                                                                        

                                        

                                            

                                                

                                                    
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                                                    Akanksha_Rai                                                

                                            

                                            

            
                                        

                                        

                                            

                                                
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