nohaelprince@uwaterloo.ca, 01-05-2014
nohaelprince@uwaterloo.ca, 01-05-2014
nohaelprince@uwaterloo.ca, 01-05-2014
nohaelprince@gmail.com, 01-05-2014

INSERT INTO domains(domain_name, cnt, date_of_entry) VALUES (%s, %s, %s);

#!/usr/bin/python
import fileinput
import csv
import os
import sys
import MySQLdb

from collections import defaultdict

lst = defaultdict(list)
d_lst = defaultdict(list)

# ======================== Defined Functions ======================
def get_file_path(filename):
    currentdirpath = os.getcwd()
    # get current working directory path
    filepath = os.path.join(currentdirpath, filename)
    return filepath
# ===========================================================
def read_CSV(filepath):

   domain_list = []
   domain_date_list = []
   sorted_domain_list_bydate = defaultdict(list)

   with open(filepath, 'rb') as csvfile:
       reader = csv.reader(csvfile)

       for row in reader:
          # insert the 1st & 2nd column of the CSV file into a set called input_list
           email = row[0].strip().lower()
           date  = row[1].strip()

           domain_date_list.append([date, email[ email.find("@") : ]])
           domain_list.append(email[ email.find("@") : ])

   for k, v in domain_date_list:
         sorted_domain_list_bydate[k].append(v)


   # remove duplicates from domain list
   domain_list = list(set(domain_list))

   return sorted_domain_list_bydate, domain_list
# ===========================================================
def update_DB(lst):

    # open a database connection
    db = MySQLdb.connect(host="localhost", # your host, usually localhost
                         user="root", # your username
                          passwd="abcdef1234", # your password
                          db="test") # name of the data base
    cur = db.cursor()

    a = []
    for k, v in lst.items():
        # now what should I do here?
        # this is what I am confuse

    db.commit()
    db.close()
# ==========================================================

# ======================= main program =======================================
path = get_file_path('emails.csv')
[lst, d_lst] = read_CSV(path) # read the input file
update_DB(lst) # insert data into domains table