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single dispatch method solution in Creative category for Voice TV Control by ogoro
from functools import singledispatchmethod
class VoiceCommand:
def __init__(self, channels):
self.channels = channels
self.current_channel_index = 0
def set_channel(self, channel_index):
self.current_channel_index = channel_index
return self.channels[channel_index]
def first_channel(self):
return self.set_channel(0)
def last_channel(self):
return self.set_channel(-1)
def turn_channel(self, channel_number):
return self.set_channel(channel_number - 1)
def next_channel(self):
next_channel_index = (self.current_channel_index + 1) % len(self.channels)
return self.set_channel(next_channel_index)
def previous_channel(self):
previous_channel_index = (self.current_channel_index - 1) % len(self.channels)
return self.set_channel(previous_channel_index)
def current_channel(self):
return self.channels[self.current_channel_index]
@singledispatchmethod
def is_exist(self, *args, **kwargs):
print('Basic is_exist')
@is_exist.register(int)
def _(self, channel):
is_channel_found = 0 < channel <= len(self.channels)
return ("No", "Yes")[is_channel_found]
@is_exist.register(str)
def _(self, channel):
is_channel_found = channel in self.channels
return ("No", "Yes")[is_channel_found]
March 14, 2021
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