How do you remove a string from a string in python?

Question

The following methods are used to remove a specific character from a string in Python.

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1. Removing a Character from String using the Naive method
2. Removal of Character from a String using replace() Method
3. Removal of Character from a String using Slicing and Concatenation
4. Removal of Character from a String using join() method and list comprehension
5. Removal of character from a string using translate() method
Python Remove Character from String
Python Remove Character from String using replace()
Python Remove Character from String using translate()
Removing Spaces from a String
Python Remove newline from String
Remove substring from string
Remove specified number of times
How do you remove part of a string from a string?
How do I remove a specific element from a string in Python?
How do I remove a character from a string?

By using Naive method
By using replace() function
By using slice and concatenation
By using join() and list comprehension
By using translate() method

Note that the string is immutable in Python. So the original string remains unchanged and a new string is returned by these methods.

1. Removing a Character from String using the Naive method

In this method, we have to run a loop and append the characters and build a new string from the existing characters except when the index is n. (where n is the index of the character to be removed)

input_str = "DivasDwivedi"
  
# Printing original string  
print ("Original string: " + input_str) 
  
result_str = "" 
  
for i in range(0, len(input_str)): 
    if i != 3: 
        result_str = result_str + input_str[i] 
  
# Printing string after removal   
print ("String after removal of i'th character : " + result_str)

Output:

Original string: DivasDwivedi
String after removal of i’th character : DivsDwivedi

2. Removal of Character from a String using replace() Method

str = "Engineering"
  

print ("Original string: " + str) 
  

res_str = str.replace('e', '') 
  

# removes all occurrences of 'e' 
print ("The string after removal of character: " + res_str) 
  
# Removing 1st occurrence of e 

res_str = str.replace('e', '', 1) 
   
print ("The string after removal of character: " + res_str)

Output:

Original string: Engineering
The string after removal of character: Enginring
The string after removal of character: Enginering

3. Removal of Character from a String using Slicing and Concatenation

str = "Engineering"
  

print ("Original string: " + str) 
  
# Removing char at pos 3 
# using slice + concatenation 
res_str = str[:2] +  str[3:] 
  

print ("String after removal of character: " + res_str)

Output:

Original string: Engineering
String after removal of character: Enineering

4. Removal of Character from a String using join() method and list comprehension

In this technique, every element of the string is converted to an equivalent element of a list, after which each of them is joined to form a string excluding the particular character to be removed.

str = "Engineering"
  

print ("Original string: " + str) 
  
# Removing char at index 2 
# using join() + list comprehension 
res_str = ''.join([str[i] for i in range(len(str)) if i != 2]) 
  

print ("String after removal of character: " + res_str)

Output:

Original string: Engineering
String after removal of character: Enineering

5. Removal of character from a string using translate() method

str = 'Engineer123Discipline'

print(str.translate({ord(i): None for i in '123'}))

Output:

EngineerDiscipline

References

Python String
Python removal of character from a string

Sometimes we want to remove all occurrences of a character from a string. There are two common ways to achieve this.

Python Remove Character from String

Using string replace() function
Using string translate() function

Python Remove Character from String using replace()

We can use string replace() function to replace a character with a new character. If we provide an empty string as the second argument, then the character will get removed from the string. Note that the string is immutable in Python, so this function will return a new string and the original string will remain unchanged.

s = 'abc12321cba'

print(s.replace('a', ''))

Output: bc12321cb

Python Remove Character from String using translate()

Python string translate() function replace each character in the string using the given translation table. We have to specify the Unicode code point for the character and ‘None’ as a replacement to remove it from the result string. We can use ord() function to get the Unicode code point of a character.

s = 'abc12321cba'

print(s.translate({ord('a'): None}))

Output: bc12321cb If you want to replace multiple characters, that can be done easily using an iterator. Let’s see how to remove characters ‘a’, ‘b’ and ‘c’ from a string.

s = 'abc12321cba'

print(s.translate({ord(i): None for i in 'abc'}))

Output: 12321

Removing Spaces from a String

s = ' 1 2 3 4 '
print(s.replace(' ', ''))  # 1234
print(s.translate({ord(i): None for i in ' '}))  # 1234

Python Remove newline from String

s = 'ab\ncd\nef'
print(s.replace('\n', ''))
print(s.translate({ord('\n'): None}))

Remove substring from string

String replace() function arguments is string. Let’s see how to remove a word from a string.

s = 'ab12abc34ba'
print(s.replace('ab', ''))

Output: 12c34ba

Remove specified number of times

We can also pass a third parameter in replace() function to specify the number of times replacement should be performed.

s = 'abababab'
print(s.replace('a', 'A', 2))

Output: AbAbabab

You can checkout complete python script and more Python examples from our GitHub Repository.

How do you remove part of a string from a string?

We can remove part of the string using REPLACE() function. We can use this function if we know the exact character of the string to remove. REMOVE(): This function replaces all occurrences of a substring within a new substring.

How do I remove a specific element from a string in Python?

Using translate(): translate() is another method that can be used to remove a character from a string in Python. translate() returns a string after removing the values passed in the table. Also, remember that to remove a character from a string using translate() you have to replace it with None and not "" .

How do I remove a character from a string?

You can also remove a specified character or substring from a string by calling the String. Replace(String, String) method and specifying an empty string (String. Empty) as the replacement.

programming python Replace Python Substring Python String Python