前几天我在想这个问题。假设您有数字列表:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 19, 21, 22, 23, 999, 1000, 1001
是否有任何库或代码片段可以将以下内容变成如下内容:
1-13, 19, 21-23, 999-1001
换句话说,将一个完整的数字列表减少到一堆范围左右。我什么也没找到。如果不存在这样的事情,有人对有效实现有一些想法吗?
最佳答案
def get_groups(lst):
slices = [i+1 for i, v in enumerate(zip(lst, l[1:])) if v[0] != v[1]-1]
slices = [0] + slices + [len(lst)]
for start, end in zip(slices, slices[1:]):
yield lst[start:end]
>>> list(get_groups([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 19, 21, 22, 23, 999, 1000, 1001]))
[[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13], [19], [21, 22, 23], [999, 1000, 1001]]
或
def get_ranges(lst):
slices = [i+1 for i, v in enumerate(zip(lst, l[1:])) if v[0] != v[1]-1]
slices = [0] + slices + [len(lst)]
for start, end in zip(slices, slices[1:]):
yield "%d-%d" % (lst[start], lst[end-1])
>>> list(get_ranges([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 19, 21, 22, 23, 999, 1000, 1001]))
['1-13', '19-19', '21-23', '999-1001']
关于python - 从数字列表生成 "efficent"编码,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/6128895/