TheAlgorithms-Python

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import re
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def indian_phone_validator(phone: str) -> bool:
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    """
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    Determine whether the string is a valid phone number or not
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    :param phone:
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    :return: Boolean
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    >>> indian_phone_validator("+91123456789")
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    False
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    >>> indian_phone_validator("+919876543210")
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    True
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    >>> indian_phone_validator("01234567896")
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    False
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    >>> indian_phone_validator("919876543218")
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    True
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    >>> indian_phone_validator("+91-1234567899")
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    False
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    >>> indian_phone_validator("+91-9876543218")
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    True
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    """
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    pat = re.compile(r"^(\+91[\-\s]?)?[0]?(91)?[789]\d{9}$")
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    if match := re.search(pat, phone):
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        return match.string == phone
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    return False
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if __name__ == "__main__":
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    print(indian_phone_validator("+918827897895"))
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