Question

我想基于if-else结果创建结果字符串列表，但是当前在运行循环时只能看到1值字符串。

示例：

for ips in npat:
    ipnet = ips.strip()
    print ("Processing ..... ", ipnet)
    fgen = "grep " +ipnet+ " /mnt/hgfs/IRR/fgen.txt"
    f2pat = re.findall(ipnet,fgen)
    print ("\nCommand: ",fgen)
    os.system(fgen)
    print ("\n NEW NPATH: ",f2pat)

    flist = []
    if ipnet in f2pat:
        flist.append("Grep Found")
        print ("Result ", flist)
    else:
        flist.append("Grep NotFound")
        print ("Result: ",flist)

flist -> ['Grep Found'] ...尽管列表中只有1个值，但它们应该是多个值。我可以知道你的想法吗？

谢谢。

Answer 1

似乎flist = []在循环中重新初始化了。仅将该变量移到for loop上方。因此，代码变为：

flist = []
for ips in npat:
    ipnet = ips.strip()
    print ("Processing ..... ", ipnet)
    fgen = "grep " +ipnet+ " /mnt/hgfs/IRR/fgen.txt"
    f2pat = re.findall(ipnet,fgen)
    print ("\nCommand: ",fgen)
    os.system(fgen)
    print ("\n NEW NPATH: ",f2pat)


    if ipnet in f2pat:
        flist.append("Grep Found")
        print ("Result ", flist)
    else:
        flist.append("Grep NotFound")
        print ("Result: ",flist)

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Python使用if / else附加字符串？

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