Question

How to extract only special characters from a string in Python

Answer 1

def extract_numbers(s):  
    length = len(s) 
    
    pecial_characters = ""
    for i in range(0, length):  
        ch = s[i]  
        if not ch.isalnum() or ch == " ":  
            pecial_characters = pecial_characters + ch  
            
    return pecial_characters
       
      
s = "c++14$vb.net&%java*() php <>/python 3.7.3"
       
print(extract_numbers(s))  


 
'''
run:
 
++$.&%*()  <>/ ..
 
'''

 

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