<｜begin▁of▁sentence｜>### Instruction:
Given a gradient palette created with a start color of red ('#FF0000') and an end color of blue ('#0000FF'), how many colors does the AdvancedGradientPalette contain when it is initialized with 256 gradient steps?
### Response:
from igraph.drawing.colors import AdvancedGradientPalette

# Create an AdvancedGradientPalette instance with a start and end color
gradient_palette = AdvancedGradientPalette('#FF0000', '#0000FF', n=256)

# Get the number of colors in this palette
num_colors = len(gradient_palette)

# Print the number of colors
print('Number of colors in the palette:', num_colors)
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