text: """
  Original source for MicroPython
  MicroPython TM1637 quad 7-segment LED display driver
  https://github.com/mcauser/micropython-tm1637
  
  Python3 Port
  https://github.com/depklyon/raspberrypi-python-tm1637
  
  MIT License
  Copyright (c) 2016-2018 Mike Causer
  
  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 subprocess
  from time import time, sleep, localtime
  from wiringpi import wiringPiSetupGpio, pinMode, digitalRead, digitalWrite, GPIO
  
  wiringPiSetupGpio()
  
  TM1637_CMD1 = 0x40 # 0x40 data command
  TM1637_CMD2 = 0xc0 # 0xC0 address command
  TM1637_CMD3 = 0x80 # 0x80 display control command
  TM1637_DSP_ON = 0x08 # 0x08 display on
  TM1637_DELAY = 0.00000001 # 10us delay between clk/dio pulses
  TM1637_MSB = 0x80  # msb is the decimal point or the colon depending on your display
  
  # 0-9, a-z, blank, dash, star
  _SEGMENTS = bytearray(b'\x3F\x06\x5B\x4F\x66\x6D\x7D\x07\x7F\x6F\x77\x7C\x39\x5E\x79\x71\x3D\x76\x06\x1E\x76\x38\x55\x54\x3F\x73\x67\x50\x6D\x78\x3E\x1C\x2A\x76\x6E\x5B\x00\x40\x63')
  
  class TM1637(object):
      """Library for quad 7-segment LED modules based on the TM1637 LED driver."""
      def __init__(self, clk, dio, brightness=7):
          self.clk = clk
          self.dio = dio
  
          if not 0 <= brightness <= 7:
              raise ValueError("Brightness out of range")
          self._brightness = brightness
  
          pinMode(self.clk, GPIO.INPUT)
          pinMode(self.dio, GPIO.INPUT)
          digitalWrite(self.clk, 0)
          digitalWrite(self.dio, 0)
          
          sleep(TM1637_DELAY)
  
          self._write_data_cmd()
          self._write_dsp_ctrl()
  
      def _start(self):
          pinMode(self.dio, GPIO.OUTPUT)
          sleep(TM1637_DELAY)
          pinMode(self.clk, GPIO.OUTPUT)
          sleep(TM1637_DELAY)
  
      def _stop(self):
          pinMode(self.dio, GPIO.OUTPUT)
          sleep(TM1637_DELAY)
          pinMode(self.clk, GPIO.INPUT)
          sleep(TM1637_DELAY)
          pinMode(self.dio, GPIO.INPUT)
          sleep(TM1637_DELAY)
  
      def _write_data_cmd(self):
          # automatic address increment, normal mode
          self._start()
          self._write_byte(TM1637_CMD1)
          self._stop()
  
      def _write_dsp_ctrl(self):
          # display on, set brightness
          self._start()
          self._write_byte(TM1637_CMD3 | TM1637_DSP_ON | self._brightness)
          self._stop()
  
      def _write_byte(self, b):
          for i in range(8):
              pinMode(self.clk, GPIO.OUTPUT)
              sleep(TM1637_DELAY)
              pinMode(self.dio, GPIO.INPUT if b & 1 else GPIO.OUTPUT)
              sleep(TM1637_DELAY)
              pinMode(self.clk, GPIO.INPUT)
              sleep(TM1637_DELAY)
              b >>= 1
          pinMode(self.clk, GPIO.OUTPUT)
          sleep(TM1637_DELAY)
          pinMode(self.clk, GPIO.INPUT)
          sleep(TM1637_DELAY)
          pinMode(self.clk, GPIO.OUTPUT)
          sleep(TM1637_DELAY)
  
      def brightness(self, val=None):
          """Set the display brightness 0-7."""
          # brightness 0 = 1/16th pulse width
          # brightness 7 = 14/16th pulse width
          if val is None:
              return self._brightness
          if not 0 <= val <= 7:
              raise ValueError("Brightness out of range")
  
          self._brightness = val
          self._write_data_cmd()
          self._write_dsp_ctrl()
  
      def write(self, segments, pos=0):
          """Display up to 6 segments moving right from a given position.
          The MSB in the 2nd segment controls the colon between the 2nd
          and 3rd segments."""
          if not 0 <= pos <= 5:
              raise ValueError("Position out of range")
          self._write_data_cmd()
          self._start()
  
          self._write_byte(TM1637_CMD2 | pos)
          for seg in segments:
              self._write_byte(seg)
          self._stop()
          self._write_dsp_ctrl()
  
      def encode_digit(self, digit):
          """Convert a character 0-9, a-f to a segment."""
          return _SEGMENTS[digit & 0x0f]
  
      def encode_string(self, string):
          """Convert an up to 4 character length string containing 0-9, a-z,
          space, dash, star to an array of segments, matching the length of the
          source string."""
          segments = bytearray(len(string))
          for i in range(len(string)):
              segments[i] = self.encode_char(string[i])
          return segments
  
      def encode_char(self, char):
          """Convert a character 0-9, a-z, space, dash or star to a segment."""
          o = ord(char)
          if o == 32:
              return _SEGMENTS[36] # space
          if o == 42:
              return _SEGMENTS[38] # star/degrees
          if o == 45:
              return _SEGMENTS[37] # dash
          if o >= 65 and o <= 90:
              return _SEGMENTS[o-55] # uppercase A-Z
          if o >= 97 and o <= 122:
              return _SEGMENTS[o-87] # lowercase a-z
          if o >= 48 and o <= 57:
              return _SEGMENTS[o-48] # 0-9
          raise ValueError("Character out of range: {:d} '{:s}'".format(o, chr(o)))
  
      def hex(self, val):
          """Display a hex value 0x0000 through 0xffff, right aligned."""
          string = '{:04x}'.format(val & 0xffff)
          self.write(self.encode_string(string))
  
      def number(self, num):
          """Display a numeric value -999 through 9999, right aligned."""
          # limit to range -999 to 9999
          num = max(-999, min(num, 9999))
          string = '{0: >4d}'.format(num)
          self.write(self.encode_string(string))
  
      def numbers(self, num1, num2, colon=True):
          """Display two numeric values -9 through 99, with leading zeros
          and separated by a colon."""
          num1 = max(-9, min(num1, 99))
          num2 = max(-9, min(num2, 99))
          segments = self.encode_string('{0:0>2d}{1:0>2d}'.format(num1, num2))
          if colon:
              segments[1] |= 0x80 # colon on
          self.write(segments)
  
      def temperature(self, num):
          if num < -9:
              self.show('lo') # low
          elif num > 99:
              self.show('hi') # high
          else:
              string = '{0: >2d}'.format(num)
              self.write(self.encode_string(string))
          self.write([_SEGMENTS[38], _SEGMENTS[12]], 2) # degrees C
  
      def show(self, string, colon=False):
          segments = self.encode_string(string)
          if len(segments) > 1 and colon:
              segments[1] |= 128
          self.write(segments[:4])
  
      def scroll(self, string, delay=250):
          segments = string if isinstance(string, list) else self.encode_string(string)
          data = [0] * 8
          data[4:0] = list(segments)
          for i in range(len(segments) + 5):
              self.write(data[0+i:4+i])
              sleep(delay / 1000)
  
  
  class TM1637Decimal(TM1637):
      """Library for quad 7-segment LED modules based on the TM1637 LED driver.
  
      This class is meant to be used with decimal display modules (modules
      that have a decimal point after each 7-segment LED).
      """
  
      def encode_string(self, string):
          """Convert a string to LED segments.
  
          Convert an up to 4 character length string containing 0-9, a-z,
          space, dash, star and '.' to an array of segments, matching the length of
          the source string."""
          segments = bytearray(len(string.replace('.','')))
          j = 0
          for i in range(len(string)):
              if string[i] == '.' and j > 0:
                  segments[j-1] |= TM1637_MSB
                  continue
              segments[j] = self.encode_char(string[i])
              j += 1
          return segments
  