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Extract only characters from given string in Python
A piece of data may contain letters, numbers as well as special characters. If we are interested in extracting only the letters form this string of data, then we can use various options available in python.
With isalpha
The isalpha function will check if the given character is an alphabet or not. We will use this inside a for loop which will fetch each character from the given string and check if it is an alphabet. The join method will capture only the valid characters into the result.
Example
stringA = "Qwer34^&t%y"
# Given string
print("Given string : ", stringA)
# Find characters
res = ""
for i in stringA:
if i.isalpha():
res = "".join([res, i])
# Result
print("Result: ", res)Output
Running the above code gives us the following result −
Given string : Qwer34^&t%y Result: Qwerty
With Regular expression
We can leverage the regular expression module and use the function findall giving the parameter value which represents only the characters.
Example
import re
stringA = "Qwer34^&t%y"
# Given string
print("Given string : ", stringA)
# Find characters
res = "".join(re.findall("[a-zA-Z]+", stringA))
# Result
print("Result: ", res)Output
Running the above code gives us the following result −
Given string : Qwer34^&t%y Result: Qwerty
Updated on: 05-May-2020
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