How to check whether there is any special characters present in the given string using python?

Question

The prog asks me to check whether any special char like !@#... are present in the given string. How can I do this?

Answer 1

Define a function first. Use re.search with a pattern [^\w\s\d] which will match anything that is not a letter, space, digit, or underscore.

In [43]: def foo(string):
    ...:     return 'Valid' if not re.search('[^\w\s]', string) else 'Invalid'
    ...: 

Now, you may call it with your strings:

In [44]: foo("@#example!")
Out[44]: 'Invalid'

In [45]: foo("Seemingly valid string")
Out[45]: 'Valid'

Answer 2

Try this any(x in string for x in '@#!')

Answer 3

You can use re.match to do this task.

Try :

word = "@#example!"
import re
print ("Valid" if re.match("^[a-zA-Z0-9_]*$", word) else "Invalid")

Output :

Invalid