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bestehen
V2EX  ›  Python

这个为啥匹配是空呢?

  •  
  •   bestehen · Jul 28, 2018 · 2324 views
    This topic created in 2980 days ago, the information mentioned may be changed or developed.

    for i in range(1,10): s.append(i)

    s [1, 2, 3, 4, 5, 6, 7, 8, 9] for i in range(-1,-3): s.remove(s[i])

    s [1, 2, 3, 4, 5, 6, 7, 8, 9]

    ddzzhen
        1
    ddzzhen  
       Jul 28, 2018 via Android
    -1,-3 ?
    删除主要是 pop 吧
    xpresslink
        2
    xpresslink  
       Jul 28, 2018
    range(-1,-3) 必须要写成 range(-1, -3,-1), 或 range(-2, 0)
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