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# Python string | digits

• Difficulty Level : Basic
• Last Updated : 16 Oct, 2018

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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