"""
When you press a keyboard button, the script will output the
current time and the button pressed to the file 'response.txt'
"""
import viz

viz.go()

import vizinfo
vizinfo.InfoPanel()

# Opens file 'response.txt' in write mode
file = open('response.txt', 'w')

# Define a function that saves data
def SaveData(currenttime, key):
    # Create the output string
    out = str(currenttime) + '\t' + key + '\n'
    # Write the string to the output file
    file.write(out)
    # Makes sure the file data is really written to the harddrive
    file.flush()
    print(out)

# Define a function that is called every time a keyboard button is pressed
def mykeyboard(key):
    # Calls the function SaveData and hands it the current time and key
    SaveData(viz.tick(),key)

# Defines a callback for keyboard events
viz.callback(viz.KEYDOWN_EVENT, mykeyboard)