Python: Remove unwanted characters from a given string

Last update on June 12 2025 12:41:33 (UTC/GMT +8 hours)

Remove unwanted characters in string.

Write a Python program to remove unwanted characters from a given string.

Sample Solution:

Python Code:

# Define a function to remove unwanted characters from a string
def remove_chars(str1, unwanted_chars):
    # Iterate through each unwanted character
    for i in unwanted_chars:
        # Use the replace() method to remove occurrences of the unwanted character from the string
        str1 = str1.replace(i, '')
    
    # Return the modified string without unwanted characters
    return str1

# Initialize two strings
str1 = "Pyth*^on Exercis^es"
str2 = "A%^!B#*CD"

# Specify a list of unwanted characters
unwanted_chars = ["#", "*", "!", "^", "%"]

# Print the original string and a message indicating the removal of unwanted characters
print("Original String : " + str1)
print("After removing unwanted characters:")
# Call the function to remove unwanted characters and print the result
print(remove_chars(str1, unwanted_chars))

# Print a newline for better formatting
print("\nOriginal String : " + str2)
print("After removing unwanted characters:")
# Call the function to remove unwanted characters and print the result
print(remove_chars(str2, unwanted_chars)) 

Sample Output:

Original String : Pyth*^on Exercis^es
After removing unwanted characters:
Python Exercises

Original String : A%^!B#*CD
After removing unwanted characters:
ABCD

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to remove all non-alphanumeric characters from a string using regular expressions.
• Write a Python program to filter a string and return only letters and digits by iterating over each character.
• Write a Python program to implement a function that cleans a string by stripping punctuation and special symbols.
• Write a Python program to use the translate() method with a translation table to remove unwanted characters.

Go to:

• Python Data Type String Exercises Home ↩
• Python Exercises Home ↩

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