Code reviewMediumcr-p087

Subject SecurityLevel Mid–Senior~18 minCommon in Security interviewsIndustries Software development

Question

Review this input check that should allow only digits.

What a strong answer looks like

Separate real bugs from style. Rank issues by severity, point at the root cause rather than the symptom, and suggest a concrete fix — specific and kind.

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Code to reviewpython

1import re2if re.match(r'\d+', user_id):3    process(user_id)

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