List comprehension and ord() in Python to remove all characters other than alphabets
Given a string consisting of alphabets and other characters, remove all the characters other than alphabets and print the string so formed.
Examples:
Input : str = "$Gee*k;s..fo, r'Ge^eks?" Output : GeeksforGeeks
This problem has existing solution please refer Remove all characters other than alphabets from string link.
We will solve this problem in python quickly using List Comprehension.
Approach : is
1. Traverse string 2. Select characters which lie in range of [a-z] or [A-Z] 3. Print them together
How does ord() and range() function works in python ?
- The ord() method returns an integer representing the Unicode code point of the given Unicode character.For example,
ord('5') = 53 and ord('A') = 65 and ord('$') = 36 - The range(a,b,step) function generates a list of elements which ranges from a inclusive to b exclusive with increment/decrement of given step.
# Python code to remove all characters # other than alphabets from string def removeAll(input): # Traverse complete string and separate # all characters which lies between [a-z] or [A-Z] sepChars = [char for char in input iford(char) in range(ord('a'),ord('z')+1,1) or ord(char) inrange(ord('A'),ord('Z')+1,1)] # join all separated characters # and print them together return ''.join(sepChars) # Driver program if __name__ == "__main__": input = "$Gee*k;s..fo, r'Ge^eks?" print (removeAll(input)) |
Output:
GeeksforGeeks
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