Question

我有这种（某种）大文本文件，我必须找到告诉当前操作的特定行。对于其中一些线路，我找到了另一条线路（通常在下面4-6线路），它告诉我们所述行动的信息。我当前的脚本如下所示：

fileLines = file.readlines()
nrlines = enumerate(fileLines)
for i,line in nrlines:
    if "TiltArmAxis::StateGoingToAlmostUp" in line:
        print "%d - %s" % (i, line)
        for i,line in range(i, i+7):
            if "Axis::StatePositionMode:" in line:
                print "%d - %s" % (i, line)

它适用于第一个但不是第二个，我得到：

4520 - "2014-11-13 08:13:43",T:305310  TiltArmAxis - changing state from TiltArmAxis::StateAtDown -> TiltArmAxis::StateGoingToAlmostUp

但是：

for i,line in range(i, i+7):
TypeError: unpack non-sequence

所以基本上，我想用枚举对每一行进行索引，然后在其中找到带有“TiltArmAxis :: StateGoingToAlmostUp”的行并打印。然后在接下来的6行中查找“Axis :: StatePositionMode：”，如果出现这样的行（如果没有，跳过它）;打印它然后转到下一个“TiltArmAxis :: StateGoingToAlmostUp”。

有更有效的方法吗？请帮忙

编辑：删除了args，

range(i, i+7):

仍然得到相同的错误

Answer 1

我们可以简单地索引行列表。

with open("test.txt", "rt") as f:
    lines = f.readlines()
    for i in range(len(lines)):
        if "TiltArmAxis::StateGoingToAlmostUp" in lines[i]:
            print "%d - %s" % (i, lines[i])
            for j in range(i, min(i+7, len(lines))):
                if "Axis::StatePositionMode:" in lines[j]:
                    print "%d - %s" % (j, lines[j])

或者，我们仍然可以使用enumerate：

with open("test.txt", "rt") as f:
    lines = f.readlines()
    for i, line in enumerate(lines):
        if "TiltArmAxis::StateGoingToAlmostUp" in line:
            print "%d - %s" % (i, line)
            for j, line in enumerate(lines[i:i+7]):
                if "Axis::StatePositionMode:" in line:
                    print "%d - %s" % (i+j, line)

最后一个没有将整个文件加载到RAM的解决方案。它假设字符串＆＃34; TiltArmAxis :: StateGoingToAlmostUp＆＃34;在接下来的6行中不再出现。

with open("test.txt", "rt") as f:
    look_for_next = False
    for i, line in enumerate(f):
        if look_for_next:
            if i < limit:
                if "Axis::StatePositionMode:" in line:
                    print "%d - %s" % (i, line)
                    look_for_next = False
            else:
                look_for_next = False
        else:
            if "TiltArmAxis::StateGoingToAlmostUp" in line:
                print "%d - %s" % (i, line)
                look_for_next = True
                limit = i + 7

Answer 2

let foo (f : (string -> 'b[])) (s : string) (t : Attribute) = let attrs = f s match attrs.Length with | 0 -> None | _ -> t(o = attrs.[0])是t和range(i, i+7)之间的整数的简单序列。你需要的是：

顺便说一下，如果在内循环期间到达文件末尾，则应使用i+7保护nrlines = enumerate(file) for i,line in nrlines: if "TiltArmAxis::StateGoingToAlmostUp" in line: print "%d - %s" % (i, line) for j in range(7): i, line = next(nrlines) # use next on the iterator ! if "Axis::StatePositionMode:" in line: print "%d - %s" % (i, line)以避免错误。我不能这样做，因为我不知道你想做什么，除了案例： - ）

迭代线索引并打印整行

2 个答案: