input: Write a function to set up GPIO pins, import necessary modules, define operating modes, prompt for password and mode selection, check license validity and user registration, calculate BAC, open solenoid to dispense beer if valid license and BAC below a threshold, and record swipe data in appropriate files. The function should return a boolean indicating whether the beer was dispensed successfully or not. Assume that the threshold for BAC is 0.08 and that the password is "admin".
  
  def dispense_beer(raw_text):
      from time import sleep
      import RPi.GPIO as GPIO
      import getpass
      import time
      import re
      from CheckLicense import check_license, calc_BAC
  
      GPIO.setmode(GPIO.BOARD)
      GPIO.setwarnings(False)
      GPIO.setup(3, GPIO.OUT)
      GPIO.setup(3, GPIO.LOW)
  
      mode_req = raw_input("Enter Mode(normal, party, barkeep): ")
      passwd = getpass.getpass("Enter password: ")
  
      if passwd != "admin":
          return False
  
      mode = mode_req
  
      if mode == 'normal':
          check_license_out = check_license(raw_text)
          valid_license = check_license_out[0]
          first_name = check_license_out[1]
          last_name = check_license_out[2]
          DL_num = check_license_out[3]
  
          users = open("users_list.txt", 'r')
          hit = 0
          if valid_license == 'Yes':
              for line in users:
                  if re.search(DL_num, line, re.IGNORECASE):
                      hit += 1
              if hit < 1:
                  valid_license = 'No'
  
          BAC = calc_BAC(raw_text)
          if valid_license == 'Yes' and BAC < 0.08:
              GPIO.setup(3, GPIO.HIGH)
              sleep(2)
              GPIO.setup(3, GPIO.LOW)
              with open("swipes.txt", "a") as myfile:
                  myfile.write(last_name + "," + first_name + " " + DL_num + " " + mode + " " + time.strftime("%Y-%m-%d") + " " + str(time.time()) + "\n")
              return True
          else:
              return False
  
      elif mode == 'party':
          check_license_out = check_license(raw_text)
          valid_license = check_license_out[0]
          first_name = check_license_out[1]
          last_name = check_license_out[2]
  
          if valid_license == 'Yes':
              GPIO.setup(3, GPIO.HIGH)
              sleep(2)
              GPIO.setup(3, GPIO.LOW)
              with open("swipes_normal.txt", "a") as myfile:
                  myfile.write(last_name + "," + first_name + "," + time.strftime("%Y%m%d%H%M%S\n"))
              return True
          else:
              return False
  
      elif mode == 'barkeep':
          check_license_out = check_license(raw_text)
          valid_license = check_license_out[0]
          first_name = check_license_out[1]
          last_name = check_license_out[2]
  
          blacklist = open("blacklist.txt", 'r')
          hit = 0
          if valid_license == 'Yes':
              for line in blacklist:
                  if re.search(last_name, line, re.IGNORECASE) or re.search(first_name, line, re.IGNORECASE):
                      hit += 1
              if hit >= 2:
                  blacklisted = 'Yes'
              else:
                  blacklisted = 'No'
  
          BAC = calc_BAC(raw_text)
          if blacklisted == 'No' and BAC < 0.08:
              GPIO.setup(3, GPIO.HIGH)
              sleep(2)
              GPIO.setup(3, GPIO.LOW)
              with open("swipes_barkeep.txt", "a") as myfile:
                  myfile.write(last_name + "," + first_name + "_" + time.strftime("%Y-%m-%d %H:%M%S\n"))
              return True
          else:
              return False
  
      return False
  
  assert dispense_beer("DL_12345") == True
  assert dispense_beer("DL_67890") == False
  assert dispense_beer("") == False
  assert dispense_beer("invalid_license") == False
  assert dispense_beer("DL_11223") == False
output: def dispense_beer(raw_text):
      from time import sleep
      import RPi.GPIO as GPIO
      import getpass
      import time
      import re
      from CheckLicense import check_license, calc_BAC
  
      GPIO.setmode(GPIO.BOARD)
      GPIO.setwarnings(False)
      GPIO.setup(3, GPIO.OUT)
      GPIO.setup(3, GPIO.LOW)
  
      mode_req = raw_input("Enter Mode(normal, party, barkeep): ")
      passwd = getpass.getpass("Enter password: ")
  
      if passwd != "admin":
          return False
  
      mode = mode_req
  
      if mode == 'normal':
          check_license_out = check_license(raw_text)
          valid_license = check_license_out[0]
          first_name = check_license_out[1]
          last_name = check_license_out[2]
          DL_num = check_license_out[3]
  
          users = open("users_list.txt", 'r')
          hit = 0
          if valid_license == 'Yes':
              for line in users:
                  if re.search(DL_num, line, re.IGNORECASE):
                      hit += 1
              if hit < 1:
                  valid_license = 'No'
  
          BAC = calc_BAC(raw_text)
          if valid_license == 'Yes' and BAC < 0.08:
              GPIO.setup(3, GPIO.HIGH)
              sleep(2)
              GPIO.setup(3, GPIO.LOW)
              with open("swipes.txt", "a") as myfile:
                  myfile.write(last_name + "," + first_name + " " + DL_num + " " + mode + " " + time.strftime("%Y-%m-%d") + " " + str(time.time()) + "\n")
              return True
          else:
              return False
  
      elif mode == 'party':
          check_license_out = check_license(raw_text)
          valid_license = check_license_out[0]
          first_name = check_license_out[1]
          last_name = check_license_out[2]
  
          if valid_license == 'Yes':
              GPIO.setup(3, GPIO.HIGH)
              sleep(2)
              GPIO.setup(3, GPIO.LOW)
              with open("swipes_normal.txt", "a") as myfile:
                  myfile.write(last_name + "," + first_name + "," + time.strftime("%Y%m%d%H%M%S\n"))
              return True
          else:
              return False
  
      elif mode == 'barkeep':
          check_license_out = check_license(raw_text)
          valid_license = check_license_out[0]
          first_name = check_license_out[1]
          last_name = check_license_out[2]
  
          blacklist = open("blacklist.txt", 'r')
          hit = 0
          if valid_license == 'Yes':
              for line in blacklist:
                  if re.search(last_name, line, re.IGNORECASE) or re.search(first_name, line, re.IGNORECASE):
                      hit += 1
              if hit >= 2:
                  blacklisted = 'Yes'
              else:
                  blacklisted = 'No'
  
          BAC = calc_BAC(raw_text)
          if blacklisted == 'No' and BAC < 0.08:
              GPIO.setup(3, GPIO.HIGH)
              sleep(2)
              GPIO.setup(3, GPIO.LOW)
              with open("swipes_barkeep.txt", "a") as myfile:
                  myfile.write(last_name + "," + first_name + "_" + time.strftime("%Y-%m-%d %H:%M%S\n"))
              return True
          else:
              return False
  
      return False