Python: Remove all characters except a specified character in a given string

Last update on June 12 2025 12:42:10 (UTC/GMT +8 hours)

Remove all except specified character.

Write a Python program to remove all characters except a specified character from a given string.

Sample Solution:

Python Code:

# Function to remove all chars except given char
def remove_characters(str1,c):

  # List comprehension to keep only given char
  return ''.join([el for el in str1 if el == c])

# Test string
text = "Python Exercises"

# Print original string  
print("Original string")
print(text)

# Character to keep
except_char = "P"

# Print message and result
print("Remove all characters except",except_char,"in the said string:")
print(remove_characters(text,except_char))

# Second test string
text = "google"
print("\nOriginal string")
print(text)

except_char = "g"

# Print message and result
print("Remove all characters except",except_char,"in the said string:")
print(remove_characters(text,except_char))

# Third test string
text = "exercises"
print("\nOriginal string")
print(text)

except_char = "e"

# Print message and result 
print("Remove all characters except",except_char,"in the said string:")
print(remove_characters(text,except_char))

Sample Output:

Original string
Python Exercises
Remove all characters except P in the said string:
P

Original string
google
Remove all characters except g in the said string:
gg

Original string
exercises
Remove all characters except e in the said string:
eee

Flowchart:

For more Practice: Solve these Related Problems:

Write a Python program to remove all characters from a string except for a given target character.
Write a Python program to filter a string and return only occurrences of a specified character.
Write a Python program to implement a function that scans a string and constructs a new string consisting solely of the given character.
Write a Python program to use list comprehension to retain only the specified character from the input string.

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