Add phone number validator using regex #12807
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Hi! I'm a grad student working on a research project about using large language models to automate code review. Based on your commit 345345d and the changes in strings/phone_number_validator.py, my tool generated this comment:
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Input validation: Add checks for
Noneand ensure the input is a string. If the input isNone, returnFalse. If the input is not a string, returnFalse.if phone is None: return False if not isinstance(phone, str): return False
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Length check: Add a quick length check before applying the regex to save time on regex matching for invalid lengths.
if len(phone) != 10: return False
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Trim whitespace: Use
strip()on the input before validation to handle leading or trailing whitespace.phone = phone.strip()
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Regex compilation: Compile the regex pattern once and reuse it to optimize performance.
pattern = re.compile(r"^[6-9]\d{9}$")
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Logging: Consider adding logging statements to capture the input phone number and the result of the validation.
import logging logging.basicConfig(level=logging.DEBUG) def validate_phone_number(phone: str) -> bool: logging.debug(f"Validating phone number: {phone}")
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Remove unnecessary blank lines: The two blank lines added at the beginning of the function should be removed to avoid unnecessary whitespace.
As part of my research, I'm trying to understand how useful these comments are in real-world development. If you have a moment, I'd be super grateful if you could quickly reply to these two yes/no questions:
- Does this comment provide suggestions from a dimension you hadn’t considered?
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- Do you find this comment helpful?
Thanks a lot for your time and feedback! And sorry again if this message is a bother.
This pull request adds a new algorithm to validate Indian 10-digit phone numbers using regular expressions.
✅ The function uses Python's re.fullmatch() to match valid phone numbers.
✅ It checks that the phone number starts with 6, 7, 8, or 9 and contains exactly 10 digits.
✅ The function is defined as validate_phone_number(phone: str) -> bool.
✅ It includes multiple doctests for automatic validation.
✅ The file is located in strings/phone_number_validator.py and follows the project’s coding and contribution standards.
This function is useful for basic input validation in form processors, mobile apps, and backend systems that deal with Indian users.