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class TwiMLDialConferenceView(APIView):
    """
    This view responds with a Conference Dial which puts the call in scope in the specified conference room
    """
    def post(self, request, *args, **kwargs):
        response = VoiceResponse()
        dial = Dial()
        end_conference_on_exit = request.GET.get("end_conference_on_exit", '').lower() == 'true'
        dial.conference(request.GET["conference_room"], end_conference_on_exit=end_conference_on_exit)
        response.append(dial)

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class FirstLegDisconnectedView(APIView):
    
    def post(self, request, *args, **kwargs):
        call_sid = request.POST['CallSid']
       
        conference_room = get_conference_room() # get the conference same as the customer's one
        
        response = VoiceResponse()
        dial = Dial()
        dial.conference(request.GET["conference_room"], end_conference_on_exit=False)

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def connect_second_agent_to_conference(cls, second_agent_number, conference_room):
  response = TwilioClient.conferences(conference_room).participants.create(
    from_=twilio_caller_id,
    to=second_agent_number,
    early_media=True
  )
  
  return response

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class Home(object):

    def __init__(self):
        self._fan_state = "OFF"
        self._fan_speed = 0

    def turn_fan_on(self):
        self._fan_state = "ON"

    def turn_fan_off(self):

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"""
Scamming the Coding Interview
"""


def generate_super_sets(power_set, elements, running_set, start_index):

    if start_index > len(elements):
        return

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"""
Scamming the coding interview
"""


def is_valid(sudoku_grid, i, j):

    is_board_valid = check_the_grid(sudoku_grid, i, j) and \
                     check_row(sudoku_grid, i, j) and \
                     check_col(sudoku_grid, i, j)

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"""
Scamming the coding interview
"""

chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890'

memory_db = {}


def get_shorten_url(long_url, url_id):

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"""
Scamming the coding interview
"""

def color_graph(graph_adjacency, number_of_vertices):

    # First vertex gets the first color
    vertex_to_color_map = {
        0: 0
    }

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"""
Scamming the coding interview
"""

from hashlib import md5


class MerkerFile(object):

    def __init__(self):

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"""
Scamming the coding interview
"""

def generate_all_combinations(nums, combinations, start_index, running_set):
    """
    Generates all the combinations a given list of numbers
    """
    if start_index >= len(nums):
        return