Remove character from string Python

In this Python tutorial, we will discuss how to remove characters from string Python. We will also check:

  • Remove the first character from string python
  • Remove n character from string python
  • Remove newline from string python
  • Remove specified number of times in python
  • Python replace multiple characters in a string
  • Remove string from string python
  • How to remove punctuation from a string python
  • Remove the last character from string python
  • Remove last 4 characters from string python
  • Python remove all whitespace from a string
  • Python remove only leading and trailing spaces
  • Python split a string into equal half
  • How to reverse a string in python
  • Check if a string is number python
  • Python extract number from string
  • Check if a string contains word in python
  • Longest palindromic substring python
  • Python repeat string n times
  • Python split a string into array
  • Split sentence into list of words python
  • Last index of a string python
  • Python 3 string replace
  • Slicing a string python
  • Reverse slicing of a given string in python
  • Remove multiple characters from a string in python
  • Replace a letter in a string python
  • Python strip characters from a string

Remove first character from string python

Now, we will see how to remove first character from string in Python. We can use replace() function for removing the character with an empty string as the second argument, and then the character is removed.

Example:

my_string = 'Welcome'
print(my_string.replace('W', '')

After writing the above code (remove the first character from string python), Ones you will print “ my_string.replace() ” then the output will appear as an “ elcome ”. Here, the first character is ‘W’ which is replaced with an empty string in python.

You can refer to the below screenshot to remove the first character from string python 

Remove character from string Python
Remove the first character from string python

This is how we can remove the first character from string python.

Remove n character from string python

Now, we will see how to remove n character from string in Python. We can use the string slicing ” [n:] ” where n is used for the amount of character to remove from the string.

Example:

my_string = 'Welcome'
remove = my_string[3:]
print(remove)

After writing the above code (remove n character from string python), Ones you will print “ remove ” then the output will appear as a “ come ”. Here, n is 3 so the first 3 characters are removed from the string python.

You can refer to the below screenshot to remove n character from string python

Remove n character from string python
Remove n character from string python

This is how we can remove n character from string python.

Remove newline from string python

In python, to remove newline from string we can use replace() function for removing the ” \n ” from the string and it will remove all newline.

Example:

my_string = 'Welcome\nto\n2020'
print(my_string.replace('\n', ''))

After writing the above code (remove the newline from string python), Ones you will print “ my_string.replace() ” then the output will appear as a “ Welcometo2020 ”. Here, ” \n ” is removed with the empty string as a second argument, and the newline is removed from the string.

You can refer to the below screenshot to remove newline from string python

Remove newline from string python
Python Remove newline from string

This is how we can remove newline from string python

Remove specified number of times in python

In python, to remove a specified number of times we can use replace() function with 3 parameters to specify the number of times replacement should take place in a string.

Example:

my_string = 'Welcome'
print(my_string.replace('e', 'E', 2))

After writing the above code (remove the specified number of times in python), Ones you will print “ my_string.replace() ” then the output will appear as a “ WElcomE ”. Here, ” e ” is removed with ‘ E ‘ as a second argument and the third argument is the number of times replacement takes place.

You can refer to the below screenshot to remove specified number of times in python

Remove specified number of times in python
Remove specified number of times in python

This is how we can remove specified number of times in python.

Python replace multiple characters in a string

In python, to replace multiple characters in a string we will use str.replace() to replace characters and it will create a new string with the replaced characters.

Example:

my_string = "Sixty"
remove = ['t', 'y']
for value in remove:
my_string = my_string.replace(value, '')
print(my_string)

After writing the above code (python replace multiple characters in a string), Ones you will print “ my_string ” then the output will appear as a “ Six ”. Here, ” t ” and ” y ” old value are replaced with new which is an empty string.

You can refer to the below screenshot python replace multiple characters in a string

Python replace multiple characters in a string

This is how we can replace multiple characters in a string

Remove string from string python

In python, to remove a string from the string we will use a str.replace() method for removing the string from string python and it will create a new string.

Example:

my_string = "Sixty people arrived in the hostel"
remove = ['arrived']
for value in remove:
my_string = my_string.replace(value, '')
print(my_string)

After writing the above code (remove string from string python), Ones you will print “ my_string ” then the output will appear as a “ Sixty people in the hotel ”. Here, ” arrived ” is removed with the empty string.

You can refer to the below screenshot python remove string from string python

Remove string from string python

This is how we can remove string from string python

How to remove punctuation from a string python

In python, to remove punctuation from a string python we will use for loop to remove all punctuation from the string python.

Example:

punctuation = '''!/[email protected]#$%^&*_~()-[]{};:'"\,<>.'''
my_string = "Hello!? World!!"
remove_punct = ""
for character in my_string:
if character not in punctuation:
remove_punct = remove_punct + character
print(remove_punct)

After writing the above code (how to remove punctuation from a string python), Ones you will print “ remove_punct ” then the output will appear as a “ Hello World ”. Here, we will check each character of the string by using for loop, and it will remove all the punctuation from the string.

You can refer to the below screenshot for how to remove punctuation from a string python

How to remove punctuation from a string python

This is how we can remove punctuation from a string python

Remove the last character from string python

In python, for removing the last character from string python we will use the string slicing technique for removing the last character use negative index “my_string[:-1]” it will remove the last character of the string.

Example:

my_string = 'University'
remove_char = my_string[:-1]
print(remove_char)

After writing the above code (remove the last character from string python), Ones you will print “remove_char ” then the output will appear as a “ Universit ”. Here, we will use negative index -1 to remove the last character from the university.

You can refer to the below screenshot remove the last character from string python

Remove the last character from string python

This is how we can remove the last character from string python

Remove last 4 characters from string python

In python, for removing the last 4 character from string python we will use the string slicing technique for removing the last 4 character by using negative index “my_string[:-4]” and it will remove the last 4 character of the string.

Example:

my_string = 'University'
remove_char = my_string[:-4]
print(remove_char)

After writing the above code (remove last 4 characters from string python), Ones you will print “remove_char ” then the output will appear as a “ Univer”. Here, we will use a negative index -4 to remove the last 4 characters from the university.

You can refer to the below screenshot remove last 4 characters from string python

Remove last 4 characters from string python

This is how we can remove last 4 characters from string python

Python remove all whitespace from a string

In python, to remove all whitespace from a string we will use replace() to remove all the whitespace from the string.

Example:

my_string = " Welcome to Python "
remove = my_string.replace(" ", "")
print(remove)

After writing the above code (python remove all whitespace from a string), Ones you will print “remove” then the output will appear as a “ WelcometoPython ”. Here, we will use replace() to remove all the whitespace from the string.

You can refer to the below screenshot python remove all whitespace from a string

Python remove all whitespace from a string

This is how we can remove all whitespace from a string python

Python remove only leading and trailing spaces

In python, to remove only leading and trailing spaces we will use strip() function to remove the leading and trailing characters from start and end of the string.

Example:

my_string = " Welcome to Python \n\r\t "
remove = my_string.strip()
print(remove)

After writing the above code (python remove only leading and trailing spaces), Ones you will print “remove” then the output will appear as a “ Welcome to Python ”. Here, we will use strip() function to remove the leading and trailing characters and whitespaces from the start and end of the string.

You can refer to the below screenshot python remove only leading and trailing spaces.

Python remove only leading and trailing spaces

This is how python remove only leading and trailing spaces

Python split a string into equal half

In python, to split a string into equal half we will use string slicing method to split the string in equal half.

Example:

my_string = "PythonGuides"
string_first = my_string[:len(my_string)//2]
string_second = my_string[len(my_string)//2:]
print("My first part of string : " + string_first)
print("My second part of string : " + string_second)

After writing the above code (python split a string into equal half), Ones you will print then the output will appear as a “ My first part of string : Python, My second part of string : Guides ”. Here, we will use the string slicing method to split the string into equal half.

You can refer to the below screenshot python split a string into equal half

Python split a string into equal half

This is how python split a string into equal half

How to reverse a string in python

In python, to reverse a string in python there is no built-in function so, we will use slice that starts from the end of the string with a negative value and ends at 0.

Example:

my_string = "PythonGuide"[::-1]
print(my_string)

After writing the above code (how to reverse a string in python), Ones you will print then the output will appear as an “ ediuGnohtyP ”. Here, we will use the string slicing to reverse the string.

You can refer to the below screenshot python reverse a string in python

How to reverse a string in python

This is how to reverse a string in python

Check if a string is number python

In python, to check if all the characters are numeric we will use the method string.isnumeric() method which will return true if all the characters are number, otherwise false.

Example:

my_string = "101123"
a = my_string.isnumeric()
print(a)

After writing the above code (check if a string is number python), Ones you will print “a” then the output will appear as a “ True ”. Here, we will use isnumeric() method to check whether the string is number or not.

You can refer to the below screenshot python check if a string is number python

Check if a string is number python

Python extract number from string

The number can be extracted from the string by using split function to convert string to list and then the list comprehension help us to iterate through the list and isdigit function helps to get the digit out of string.

Example:

my_string = "Welcome 2 python 5"
number = [int(w) for w in my_string.split() if w.isdigit()]
print(number)

After writing the above code (python extract number from string), Ones you will print “number” then the output will appear as “ [2 5] ”. Here, we will use isdigit() method to get the digit from the string.

You can refer to the below screenshot python extract number from string.

Python extract number from string
Python extract number from string

Check if a string contains word in python

The easiest way to check if a string contain a word is ” in “ operator. This operator returns true if the string contains a word otherwise, it returns false.

Example:

my_str = "Rahul is good player"
check = "good" in my_str
print(check)

After writing the above code (check if a string contains word in python), Ones you will print “check” then the output will appear as “ True ”. Here, we will use in operator to check if a string contain that word or not.

You can refer to the below screenshot check if a string contains word in python

Check if a string contains word in python
Check if a string contains word in python

Longest palindromic substring python

To get longest palindrome substring, we will check each substring whether the substring is a palindrome or not. We will loop through the string treating each character as the middle of the palindrome and try to build the palindrome by comparing characters on the left with characters on the right.

Example:

class find(object):
   def longestPalindrome(self, x):
      v = [[False for i in range(len(x))] for i in range(len(x))]
      for i in range(len(x)):
         v[i][i] = True
      max_length = 1
      start = 0
      for l in range(2,len(x)+1):
         for i in range(len(x)-l+1):
            end = i+l
            if l==2:
               if x[i] == x[end-1]:
                  v[i][end-1]=True
                  max_length = l
                  start = i
            else:
               if x[i] == x[end-1] and v[i+1][end-2]:
                  v[i][end-1]=True
                  max_length = l
                  start = i
      return x[start:start+max_length]
obj1 = find()
print(obj1.longestPalindrome("ZABBABBACD"))

After writing the above code (longest palindromic substring python), Ones you will print “obj1.longestPalindrome(“ZABBABBACD”)” then the output will appear as “ ABBABBA ”. Here, we get the longest palindromic substring.

You can refer to the below screenshot longest palindromic substring python

Longest palindromic substring python
Longest palindromic substring python

Python repeat string n times

To repeat string n times we will use ” * “. The syntax to repeat string ” string * n ” where n as an integer to repeat a string n number of times.

Example:

str_repeat = "Guides" * 5
print(str_repeat)

After writing the above code (python repeat string n times), Ones you will print “str_repeat” then the output will appear as “ GuidesGuidesGuidesGuidesGuides ”. Here, the value of n is 5 and the string will repeat n times.

You can refer to the below screenshot python repeat string n times

Python repeat string n times
Python repeat string n times

Python split a string into array

To split a string into an array, we will use “string.split()” and it will split the string into an array.

Example:

string = "welcome to python happy learning"
arr = string.split()
print(arr)

After writing the above code (python split a string into array), Ones you will print ” arr ” then the output will appear as “ [‘welcome’, ‘to’, ‘python’, ‘happy’, ‘learning’] ”. Here, the string.split() method will split the string into an array.

You can refer to the below screenshot python split a string into array

Python split a string into array
Python split a string into array

Split sentence into list of words python

We can use split() method to split the given list and then we will join using the join() method.

Example:

def sentence(list):
    return ' '.join(list).split()
list = ['Welcome to Python Guides']
print(sentence(list))

After writing the above code (split sentence into a list of words python), Ones you will print “sentence(list)” then the output will appear as “ [‘Welcome’, ‘to’, ‘Python’, ‘Guides’] ”. Here, the split() method will split the sentence into a list of words.

You can refer to the below screenshot split sentence into a list of words python

Split sentence into list of words python
Split sentence into list of words python

Last index of a string python

Let us see how to find the last index of a string in python.

The rindex() method is used for finding the last index of a string in python.

Example:

my_str = "Hello, how are you"
f = my_str.rindex("u")
print(f)

After writing the above code (last index of a string python), you will print “f” then the output will appear as “ 17 ”. Here, the rindex() method returns the last index of a specified value or raises an exception if no such index exists.

You can refer to the below screenshot last index of a string python.

Last index of a string python
Last index of a string python

Python 3 string replace

In python, replace() is an inbuilt function. The replace method returns a copy of the string in which the occurrences of old are replaced with new.

Example:

my_string = "Python"
s = my_string.replace("Python", "PythonGuides")
print(s)

After writing the above code (python 3 string replace), you will print “s” then the output will appear as “ PythonGuides ”. Here, the replace() method replaces the specified string with another specified string.

You can refer to the below screenshot python 3 string replace

Python 3 string replace
Python 3 string replace

Slicing a string python

Python slicing is about obtaining a sub-string from the given string by slicing it. For getting the part of the string we will specify the start index and the end index, separated by the colon.

Example:

my_str = "Welcome, to Python!"
print(my_str[3:7])

After writing the above code (slicing a string python), you will print “my_str[3:7]” then the output will appear as “ come ”. Here, you will get the characters from position 3 to position 7 not included.

You can refer to the below screenshot slicing a string python.

Slicing a string python
Slicing a string python

Reverse slicing of a given string in python

Now, we will see reverse slicing of a given string

For reverse slicing of a given string we will use join() and reversed(). We reverse the string in memory and join the sliced number of characters and it will return a string.

Example:

my_str = "PythonGuides"
print("Original string is: " + my_str)
v = 6
result = ' '.join(reversed(my_str[0:v]))
print("The reversed sliced string is: " +result)

After writing the above code (reverse slicing of a given string in python), once you will print the “result” then the output will appear as “The reversed sliced string is: nohtyP”. Here, it will return the sliced reversed string.

You can refer to the below screenshot reverse slicing of a given string in python.

Reverse slicing of a given string in python
Reverse slicing of a given string in python

Remove multiple characters from a string in python

  • To remove multiple characters from a string, we will first create a copy of the original string.
  • Put in one string the multiple characters that will be removed.
  • Then for-loop is used to iterate through each character.
  • Then call new_string.replace() to replace old with new.

Example:

o_string = "([email protected])!"
characters_remove = "()@!"
new_string = o_string
for character in characters_remove:
  new_string = new_string.replace(character, "")
print(new_string)

After writing the above code (remove multiple characters from a string in python), once you will print the “new_string” then the output will appear as “PythonGuides”. Here, the multiple characters from a string will be removed and it will return a new string that will exclude those characters.

You can refer to the below screenshot remove multiple characters from a string in python

Remove multiple characters from a string in python
Remove multiple characters from a string in python

Replace a letter in a string python

The replace() is an inbuilt function in python programming which is used to replace a letter in a string and it returns a copy of the string after replacing.

Example:

str = ['P', 'y', 't', 'h', 'o', 'n', 'g', 'u', 'i', 'd', 'e', 's']
str[6] = 'G'
print (str)

To get the output when you will print(str) then it will return a copy of the string after replacing the letter from the string. So, str[6] index is replaced with ‘G’ in the output.

You can refer to the below screenshot replace a letter in a string python.

Replace a letter in a string python
Replace a letter in a string python

Python strip characters from a string

The strip() method in python returns a copy of the string. It will strip the specified characters from a string.

Example:

my_str = "www.pythonguides"
r = my_str.strip("guides")
print(r)

After writing the above code (python strip characters from a string), once you will print the “r” then the output will appear as “www.python”. Here, my_str.strip(“guides”) is used to strip the character “guides” from the string.

You can refer to the below screenshot python strip characters from a string.

Python strip characters from a string
Python strip characters from a string

This is how to check if a string is number python

You may like the following Python tutorials:

In this tutorial, we learned how to remove character from string Python.

  • Remove the first character from string python
  • Remove n character from string python
  • Remove newline from string python
  • Remove specified number of times in python
  • Python replace multiple characters in a string
  • Remove string from string python
  • How to remove punctuation from a string python
  • Remove the last character from string python
  • Remove last 4 characters from string python
  • Python remove all whitespace from a string
  • Python remove only leading and trailing spaces
  • Python split a string into equal half
  • How to reverse a string in python
  • Check if a string is number python
  • Python extract number from string
  • Check if a string contains word in python
  • Longest palindromic substring python
  • Python repeat string n times
  • Python split a string into array
  • Split sentence into list of words python
  • Last index of a string python
  • Python 3 string replace
  • Slicing a string python
  • Reverse slicing of a given string in python
  • Remove multiple characters from a string in python
  • Replace a letter in a string python
  • Python strip characters from a string