Question

I need to write function, that check if word is alphabetical, for example

my_function('Hello!')
>> True
my_function('How')
>> True
my_function('F!@K')
>> False
my_function('</html>')
>> False

I have no idea. I really bad in re lib.

begin_searcher = re.compile(r'[\w\-]')
end_searcher = re.compile(r'[\w\-]+[!-?]')

I can’t use non-standard libs

Answer 1

A non regex solution

from string import ascii_letters
def foo(st):
    letters = ascii_letters
    letters_nd_term = letters + "?!"
    return not any([set(st[:-1]).difference(letters),st[-1] not in letters_nd_term])