old_contents: # Copyright (c) 2014 Adafruit Industries
  # Author: Tony DiCola
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  # THE SOFTWARE.
  import time
  
  from Adafruit_LED_Backpack import AlphaNum4
  
  
  # Create display instance on default I2C address (0x70) and bus number.
  display = AlphaNum4.AlphaNum4()
  
  # Alternatively, create a display with a specific I2C address and/or bus.
  # display = AlphaNum4.AlphaNum4(address=0x74, bus=1)
  
  # Initialize the display. Must be called once before using the display.
  display.begin()
  
  # Scroll a message across the display
  message = 'This is an example of the 4 character alpha-numeric display. THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG? the quick brown fox jumps over the lazy dog!'
  pos = 0
  print 'Press Ctrl-C to quit.'
  while True:
  	# Clear the display buffer.
  	display.clear()
  	# Print a 4 character string to the display buffer.
  	display.print_str(message[pos:pos+4])
  	# Write the display buffer to the hardware.  This must be called to
  	# update the actual display LEDs.
  	display.write_display()
  	# Increment position. Wrap back to 0 when the end is reached.
  	pos += 1
  	if pos > len(message)-4:
  		pos = 0
  	# Delay for half a second.
  	time.sleep(0.5)
  
  # Note that the alphanumeric display has the same number printing functions
  # as the 7 segment display.  See the sevensegment_test.py example for good
  # examples of these functions.
  
new_contents: # Copyright (c) 2014 Adafruit Industries
  # Author: Tony DiCola
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  # THE SOFTWARE.
  import time
  
  from Adafruit_LED_Backpack import AlphaNum4
  
  
  # Create display instance on default I2C address (0x70) and bus number.
  display = AlphaNum4.AlphaNum4()
  
  # Alternatively, create a display with a specific I2C address and/or bus.
  # display = AlphaNum4.AlphaNum4(address=0x74, busnum=1)
  
  # Initialize the display. Must be called once before using the display.
  display.begin()
  
  # Scroll a message across the display
  message = 'This is an example of the 4 character alpha-numeric display. THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG? the quick brown fox jumps over the lazy dog!'
  pos = 0
  print 'Press Ctrl-C to quit.'
  while True:
  	# Clear the display buffer.
  	display.clear()
  	# Print a 4 character string to the display buffer.
  	display.print_str(message[pos:pos+4])
  	# Write the display buffer to the hardware.  This must be called to
  	# update the actual display LEDs.
  	display.write_display()
  	# Increment position. Wrap back to 0 when the end is reached.
  	pos += 1
  	if pos > len(message)-4:
  		pos = 0
  	# Delay for half a second.
  	time.sleep(0.5)
  
  # Note that the alphanumeric display has the same number printing functions
  # as the 7 segment display.  See the sevensegment_test.py example for good
  # examples of these functions.
  
subject: Update alphanum4_test.py