<｜begin▁of▁sentence｜>### Instruction:
As a pollution control engineer, you may work with a custom palette of predefined color codes to visualize data related to pollution levels in different areas. When analyzing multiple locations at once, you might need to retrieve several colors from the palette to represent various pollution categories. Using the get_many method from the PredefinedPalette class, you can efficiently fetch multiple colors to create a comprehensive and visually informative data visualization.
### Response:
from bokeh.palettes import PredefinedPalette

# Define a precalculated palette
class MyPalette(PredefinedPalette):
    palette = ['#ff0000', '#00ff00', '#0000ff']

# Instantiate the palette
my_palette = MyPalette()

# Get multiple colors from the precalculated palette
colors = my_palette.get_many([0, 2])
print(colors)
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