input: Write a python function to return the number of days in a given month.
  assert get_days_in_month("January") == 31
  assert get_days_in_month("February") == 28
  assert get_days_in_month("April") == 30
  assert get_days_in_month("December") == 31
output: def get_days_in_month(month):
      days_in_month = {
          "January": 31,
          "February": 28,
          "March": 31,
          "April": 30,
          "May": 31,
          "June": 30,
          "July": 31,
          "August": 31,
          "September": 30,
          "October": 31,
          "November": 30,
          "December": 31
      }
      return days_in_month.get(month, "Invalid month")