plot_birthdays_by_month.py

#  Ask the user for how many people are in the class

#  Initialize a variable to keep of how many people we’ve entered

#  Initialize an array named month_counts containing 12 zeroes

#  Initialize an array named month_names with ‘Jan’, ‘Feb’, …, ‘Dec’

#  As long as there are more people
    #  Ask for the next person’s birthdate

    #  Increment the number of people we have entered

    #  Break up into the month and date components using split

    #  Find the right index of the element in the array for the month

    #  Increment the value in that month by one

#  Create a plot object with no line, just circles, for the month data


#  Save that plot to the file birthdays-by-month.png