example_3.py

import records
import datetime

db = records.Database('mysql://root:a6478a14@172.16.144.157/bank')

print('Welcome to Softbank. Please enter your username and password...')
username = raw_input('Username: ')
password = raw_input('Password: ')

# This SQL library does not immediately run the query and store the results until we tell it to.
# In our case, this is not very helpful, but when running a query with hundreds of thousands of rows,
# we may not want to immediately load them all into RAM
result = db.query("SELECT * FROM user WHERE username = '" + username + "' AND password = '" + password + "';")

# Load all rows from query
result_data = result.all()
# Returns the number of rows returned from the query
rows = len(result_data)

success = "0"

if rows > 0:
    print 'Welcome ' + result_data[0]['first_name'] + '!'
    success = "1"
else:
    print 'Invalid username and password combination. Please try again.'


# We need to run an extra query searching with just the username, in case the user entered the password incorrectly,
# then we can still select the username for adding a failed login attempt
# Using two SQL queries would probably be bad practice...you would probably just use a string comparison between the username
# and password entered
username_id = db.query("SELECT * FROM user WHERE username = '" + username + "';").all()
if username_id:
    # Get the current time from the system clock, and convert it to the MySQL datetime style
    current_time = datetime.datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S')
    db.query("INSERT INTO login VALUES (NULL, " + str(username_id[0]['id']) + ", '" + current_time + "', " + success + ");")
    # Add the login attempt to the login table. This will add all successful and failed attempts to log in with this username