# Write a function to open and read data from http://www.cs.virginia.edu/~up3f/cs1110/practice-of-the-day/zipLookup.java.
# Using a regular expression to find all zip codes and write them into an output file named "zipcode.txt"
# At the end of the file, write the number of zip codes found.
#
# Consider the difference when opening an output file with a "write" mode or an "append" mode
#

import urllib.request
import re


def find_zipcode(url):
















find_zipcode("http://www.cs.virginia.edu/~up3f/cs1110/practice-of-the-day/zipLookup.java")