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Python string | digits

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  • Difficulty Level : Basic
  • Last Updated : 16 Oct, 2018
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In Python3, string.digits is a pre-initialized string used as string constant. In Python, string.digits will give the lowercase letters ‘0123456789’.

Syntax : string.digits

Parameters : Doesn’t take any parameter, since it’s not a function.

Returns : Return all digit letters.

Note : Make sure to import string library function inorder to use string.digits

Code #1 :




# import string library function 
import string 
    
# Storing the value in variable result 
result = string.digits 
    
# Printing the value 
print(result) 

Output :

0123456789

 
Code #2 : Given code checks if the string input has only digit letters




# importing string library function 
import string 
     
# Function checks if input string 
# har only digits or not 
def check(value): 
    for letter in value: 
             
        # If anything other than digit 
        # letter is present, then return 
        # False, else return True 
        if letter not in string.digits: 
            return False
    return True
     
# Driver Code 
input1 = "0123 456 789"
print(input1, "--> ",  check(input1)) 
     
input2 = "12.0124"
print(input2, "--> ", check(input2)) 
     
input3 = "12345"
print(input3, "--> ", check(input3)) 

Output:

0123 456 789 -->  False
12.0124 -->  False
12345 -->  True

Applications :
The string constant digits can be used in many practical applications. Let’s see a code explaining how to use digits to generate strong random passwords of given size.




# Importing random to generate 
# random string sequence 
import random 
    
# Importing string library function 
import string 
    
def rand_pass(size): 
        
    # Takes random choices from 
    # ascii_letters and digits 
    generate_pass = ''.join([random.choice( string.ascii_uppercase + 
                                            string.ascii_lowercase + 
                                            string.digits) 
                                            for n in range(size)]) 
                            
    return generate_pass 
    
# Driver Code  
password = rand_pass(10
print(password) 
      

Output:

2R8gaoDKqn

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