Python program to remove all character from string except alphabets
Remove all character from a string except alphabets
In this article we will learn about how to Remove all character from a string except alphabets
We will do this by checking ASCII values of each character present in the string and remove all character that does not lie in the range of alphabetic ASCII value whether it is an uppercase letter or a lowercase letter.
Algorithm
- Step 1:- Start.
- Step 2:- Take user input.
- Step 3:- Initialize a empty string.
- Step 4:- Start iterating through string.
- Step 5:- Check for the ASCII value of character and whether it lie in the range.
- Step 6:- If TRUE concatenate characters to empty string.
- Step 7:- Print String2.
- Step 8:- End.
Python program to remove all characters from string except alphabets
Run
#take user input String1 = "#Justice!For@Chutki123" #initialize empty String String2 = '' for i in String1: #check for alphabets if (ord(i) >= 65 and ord(i) <= 90) or (ord(i) >= 97 and ord(i) <= 122): #concatenate to empty string String2+=i print('Alphabets in string are :' + String2)
Alphabets in string are :JusticeForChutki
Mehod 2
Run
def removeSpecialCharacter(s):
i = 0
while i < len(s):
# Finding the character whose ASCII value fall under this range
if (ord(s[i]) < ord('A') or ord(s[i]) > ord('Z') and ord(s[i]) < ord('a') or ord(s[i]) > ord('z')):
# erase function to remove the character
del s[i]
i -= 1
i += 1
print("".join(s))
# main Code
if __name__ == '__main__':
s = "P*r;e..pi, n'st^a?"
s = [i for i in s]
removeSpecialCharacter(s)
Output
Prepinsta
Method 3
Here we are keeping track of two indexes.
Run
def removeSpecialCharacter(s): t = "" for i in s: # Store only valid characters if (i >= 'A' and i <= 'Z') or (i >= 'a' and i <= 'z'): t += i print(t) # Driver code s = "$Pre*p;i..ns, '^ta?" removeSpecialCharacter(s)
Output
Prepinsta
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st=’abc4a5s4e4xs’
for i in st:
if i.isalpha():
pass
else:
print(i)
st=st.replace(i,”)
print(st)
a = ‘23423h4b2j3h42k3n4khb2jh34kn234kn’
b = ”
for i in a:
if i <= '9':
b = b+i
else:
pass
print(b)
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x=input(“enter string :”)
y=x
for i in x:
if i.isalpha() or i==” “:
pass
else:
y=y.replace(i,”)
print(y)
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s = input(‘enter a value:’)
t = ”
for i in s:
if (‘A’ <= i <= 'Z') or ('a'<= i <= 'z'):
t+=i
print(t)