# ----------- # User Instructions # # Modify the valid_day() function to verify # whether the string a user enters is a valid # day. The valid_day() function takes as # input a String, and returns either a valid # Int or None. If the passed in String is # not a valid day, return None. # If it is a valid day, then return # the day as an Int, not a String. Don't # worry about months of different length. # Assume a day is valid if it is a number # between 1 and 31. # Be careful, the input can be any string # at all, you don't have any guarantees # that the user will input a sensible # day. # def valid_day(day): if day.isdigit() and int(day) in range(1,32): return int(day) return None # valid_day('0') => None # valid_day('1') => 1 # valid_day('15') => 15 # valid_day('500') => None
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