Python check if string is readable

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Python String isprintable() is a built-in method used for string handling. The isprintable() method returns “True” if all characters in the string are printable or the string is empty, Otherwise, It returns “False”. This function is used to check if the argument contains any printable characters such as:

• Digits ( 0123456789 )
• Uppercase letters ( ABCDEFGHIJKLMNOPQRSTUVWXYZ )
• Lowercase letters ( abcdefghijklmnopqrstuvwxyz )
• Punctuation characters ( !”#$%&'()*+, -./:;?@[\]^_`{ | }~ )
• Space ( )

Syntax: 

string.isprintable()

Parameters:

isprintable() does not take any parameters

Returns:

• True – If all characters in the string are printable or the string is empty.
• False – If the string contains 1 or more nonprintable characters.

Errors Or Exceptions:

1. The function does not take any arguments, therefore no parameters should be passed, otherwise, it returns an error.
2. The only whitespace character which is printable is space or ” “, otherwise every whitespace character is non-printable and the function returns “False”.
3. The empty string is considered printable and it returns “True”.

Example 1

Input : string = 'My name is Ayush'
Output : True

Input : string = 'My name is \n Ayush'
Output : False

Input : string = ''
Output : True

Python3

string = 'My name is Ayush'

print(string.isprintable())

string = 'My name is \n Ayush'

print(string.isprintable())

string = ''

print( string.isprintable())

Output: 

True
False
True

Example 2: Practical Application

Given a string in python, count the number of non-printable characters in the string and replace non-printable characters with a space. 

Input : string = 'My name is Ayush'
Output : 0
         My name is Ayush

Input : string = 'My\nname\nis\nAyush'
Output : 3
         My name is Ayush

Algorithm: 

1. Initialize an empty new string and a variable count = 0. 
2. Traverse the given string character by character up to its length, check if the character is a non-printable character. 
3. If it is a non-printable character, increment the counter by 1, and add a space to the new string. 
4. Else if it is a printable character, add it to the new string as it is.
5. Print the value of the counter and the new string.

Python3

string ='GeeksforGeeks\nname\nis\nCS portal'

newstring = ''

count = 0

for a in string:

    if (a.isprintable()) == False:

            count+= 1

            newstring+=' '

    else:

            newstring+= a

print(count)

print(newstring)

Output: 

3
GeeksforGeeks name is CS portal