Answer to Question #345938 in Python for Rajeev

Question

Python Program

Write a program to print the following, Given a word W and pattern P, you need to check whether the pattern matches the given word.The word will only contain letters(can be Uppercase and Lowercase). The pattern can contain letters, ? and *.

? : Can be matched with any single letter.

* : Can be matched with any sequence of letters (including an empty sequence).

If the pattern matches with the given word, print True else False.

Sample Input1

3

Hello *l?

Hell He?ll

Hell ?*

Sample Output1

True

False

True

Sample Input1

3

Hello Hell*

Hell He*ll

Hell hell*

Sample Output1

True

True

False

Answer 1

import re
from typing import Pattern


class RegExp:
    """
    This class provides matching operations similar to those found in
    file system of OS UNIX. But with a restriction syntax, which can
    only operate with upper/lower letters and ?, * wildcards.
    """
    def __init__(self, word: str, pattern: str):
        """
        Constructor

        :type word: str
        :type pattern: str
        """
        assert isinstance(word, str)
        assert isinstance(pattern, str)
        self.word = word
        # convert to a pattern with regular expression wildcards
        # i.e. '*' -> '.*' and '?' -> '.'
        pattern = pattern.replace('*', '.*')
        pattern = pattern.replace('?', '.')
        # pattern = re.sub(r'*', '.*', pattern)
        # pattern = re.sub(r'?', '.', pattern)
        # self.pattern = '^' + pattern + '$'
        self.pattern = pattern

    def is_match(self):
        prog: Pattern[str] = re.compile(self.pattern)
        result = prog.fullmatch(self.word)
        return bool(result)

    def __str__(self):
        return str(self.is_match())


r1 = RegExp("Hello", "*l?")
r2 = RegExp("Hell", "He?ll")
r3 = RegExp("Hell", "?*")

r4 = RegExp("Hello", "Hell*")
r5 = RegExp("Hell", "He*ll")
r6 = RegExp("Hell", "hell*")

r7 = RegExp("Stand with Ukraine!", "*wi*?h*!")


# print(r1.pattern)
print(r1)
# print(r2.pattern)
print(r2)
# print(r3.pattern)
print(r3, '\n')
# print(r4.pattern)
print(r4)
# print(r5.pattern)
print(r5)
# print(r6.pattern)
print(r6, '\n')
print(r7, f": \"{r7.word}\" <-- re = r'{r7.pattern}'")