Unpacking a list

[Mark17]

Here's some code:

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print() print('This program will print out a set containing all colors from color_list_1 {"White", "Black", "Red"} that are not present in color_list_2 {"Red", "Green"}.') color_list_1 = set(["White", "Black", "Red"]) color_list_2 = set(["Red", "Green"]) print() print('Colors meeting stated criteria are {}.'.format(*[i for i in color_list_1 if i not in color_list_2]))

The result of the last line is "Black"

If I leave the asterisk out, the result of the last line is "['Black', 'White']

What happened to White when I tried to unpack the list?

Thanks!

[stranac]

You are passing 2 arguments to .format(). Since your format string only has one placeholder, the second argument is ignored.

[snippsat]

Here some variants with f-string.

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color_list_1 = set(["White", "Black", "Red"]) color_list_2 = set(["Red", "Green"]) print() print(f'Colors meeting stated criteria are {[i for i in color_list_1 if i not in color_list_2]}') print(f'Colors meeting stated criteria are {color_list_1 - color_list_2}') # Can make sense to make variable outside of string result = [i for i in color_list_1 if i not in color_list_2] print(f'Colors meeting stated criteria are: {", ".join(result)}')

Output:
Colors meeting stated criteria are ['White', 'Black']
Colors meeting stated criteria are {'White', 'Black'}
Colors meeting stated criteria are: White, Black

[aajkaal]

You can use oeperator'-' or the difference method
Code:

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print('\nThis program will print out a set containing all colors from color_list_1 {"White", "Black", "Red"} that are not present in color_list_2 {"Red", "Green"}.') color_list_1 = set(["White", "Black", "Red"]) color_list_2 = set(["Red", "Green"]) print(color_list_1 - color_list_2) print(color_list_1.difference(color_list_2))

Output:

This program will print out a set containing all colors from color_list_1 {"White", "Black", "Red"} that are not present in color_list_2 {"Red", "Green"}.
{'Black', 'White'}
{'Black', 'White'}