python - 这个 Python 循环可以更简洁地表达吗？

Question

我遇到了一些 Python v2.7 代码，我已将其重构为:

for ssid in (ssid for ssid in overlaps
             if ssid != subseq_id and ssid not in merged):

但我觉得应该有一种不用两个 for 语句来表达这一点的方法吗？

Answer 1

你可以使用filter():

for ssid in filter(lambda s: s != subseq_id and s not in merged, overlaps):
    # ...

或者您可以在循环中测试:

for ssid in overlaps:
    if ssid == subseq_id or ssid in merged:
      continue
    # ...