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Python Program for Graph Coloring Problem
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colors = ['Red', 'Blue', 'Green', 'Yellow', 'Black'] | |
states = ['Andhra', 'Karnataka', 'TamilNadu', 'Kerala'] | |
neighbors = {} | |
neighbors['Andhra'] = ['Karnataka', 'TamilNadu'] | |
neighbors['Karnataka'] = ['Andhra', 'TamilNadu', 'Kerala'] | |
neighbors['TamilNadu'] = ['Andhra', 'Karnataka', 'Kerala'] | |
neighbors['Kerala'] = ['Karnataka', 'TamilNadu'] | |
colors_of_states = {} | |
def promising(state, color): | |
for neighbor in neighbors.get(state): | |
color_of_neighbor = colors_of_states.get(neighbor) | |
if color_of_neighbor == color: | |
return False | |
return True | |
def get_color_for_state(state): | |
for color in colors: | |
if promising(state, color): | |
return color | |
def main(): | |
for state in states: | |
colors_of_states[state] = get_color_for_state(state) | |
print colors_of_states | |
main() |
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