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April 27, 2023 19:09
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Practical range in Python
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| # unlike range, prange works automatically with reverse ranges, floats, and 0 steps | |
| # prange(0,-10) --> 0, -1, -2, -3, -4, -5, -6, -7, -8, -9 | |
| # prange(1,2,.1) --> 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 | |
| # prange(0,1,0) --> 0, 0, 0, ... | |
| # prange(a,b,c) --> range(a,b,c) # when a,b,c are positive integers and a<b | |
| # prange stands for practical range | |
| def prange(start, stop=None, step=1): | |
| if stop is None: | |
| stop = start | |
| start = 0 | |
| yield start | |
| step = abs(step) | |
| if stop < start: | |
| step = -step | |
| while (start - stop) * (start + step - stop) > 0: | |
| start += step | |
| yield start |
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