Python | String translate()

Difficulty Level : Hard
Last Updated : 24 Jul, 2020

translate() returns a string that is modified string of givens string according to given translation mappings.

There are two ways to translate :

Providing a mapping as a dictionary

Parameters :

string.translate(mapping)
mapping – a dictionary having mapping between two characters.
Returns : Returns modified string where each character is mapped to its corresponding character according to the provided mapping table.

# 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

One more example:

# Python 3 Program to show working
# of translate() method
  
# specifying the mapping  
# using ASCII  
translation = {103: None, 101: None, 101: None}
  
string = "geeks"
print("Original string:", string)
  
# translate string
print("Translated string:", 
       string.translate(translation))

Output:

Original string: geeks
Translated string: ks

Providing a mapping using maketrans()

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

# 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

Output :

Original string: geeks
Translated string: ks

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Python | String translate()

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