Clipping values in a human-readable way.
Clipping values in a human-readable way
Clipping numerical values to make sure they are within a lower and upper bound is a very common task.
For example, if you are dealing with RGB colours, you want each channel to be between 0 and 255, if you are dealing with shop sales, you need them to be between 0 and 1, or if you are writing a cool game, you want your character to stay inside the screen.
Now, if you have to do all this clipping, which alternative to clipping do you prefer?
clip offers human-readable syntax to your clipping operations:
from clip_values import clip colour_channel = clip(colour_channel).between_(0).and_(255) discount = clip(discount).between_(0).and_(1) player_x_pos = clip(player_x_pos).between_(0).and_(SCREEN_WIDTH)
clip alternative is the simplest and easiest to read!
Compare it with two other common alternatives:
if: ... elif: ... block is also easy to read, but takes up 4x more lines of code:
if colour_channel < 0: colour_channel = 0 elif colour_channel > 255: colour_channel = 255 if discount < 0: discount = 0 elif discount > 1: discount = 1 if player_x_pos < 0: player_x_pos = 0 elif player_x_pos > SCREEN_WIDTH: player_x_pos = SCREEN_WIDTH
max (or the other way around) is shorter, but this is much harder to read
and you have to spend a couple of minutes figuring out the interaction between the two consecutive
colour_channel = min(255, max(0, colour_channel)) discount = max(0, min(1, discount)) player_x_pos = min(SCREEN_WIDTH, max(0, player_x_pos))
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