仅追加到列表中的第一项

Question

我有一份清单我想把数据注入其中。清单一看上去像这样

data2 = ['TECH2_HELP', 'TECH2_1507', 'TECH2_1189', 'TECH2_4081', 'TECH2_5625', 'TECH2_4598', 'TECH2_1966', 'TECH2_2573', 'TECH2_1800', 'TECH2_1529']

我试图创建的主列表将像下面这样与我现有的配置一起打印。下面的打印不是预期的结果，因为您可以看到它只在data2列表中添加第一项。其次，当我尝试一个for循环时，我会将所有data2数据合并在同一个列表中，参见data3。

config1 = ['interface Gi3/0/13', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP', '!', 'interface Gi3/0/7', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP', '!', 'interface Gi1/0/11', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP', '!', 'interface Gi3/0/35', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP', '!', 'interface Gi3/0/41', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP', '!', 'interface Gi3/0/25', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP', '!', 'interface Gi3/0/43', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP', '!', 'interface Gi3/0/23', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP', '!', 'interface Gi3/0/19', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP', '!', 'interface Gi3/0/39', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP', '!']

data3=['interface Gi3/0/13', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP','description TECH2_1507','description TECH2_1189','description TECH2_4081','description TECH2_5625','description TECH2_4598','description TECH2_1966','description TECH2_2573','description TECH2_1800','description TECH2_1529', '!','interface Gi3/0/7', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP','description TECH2_1507','description TECH2_1189','description TECH2_4081','description TECH2_5625','description TECH2_4598','description TECH2_1966','description TECH2_2573','description TECH2_1800','description TECH2_1529', '!','interface Gi1/0/11', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP','description TECH2_1507','description TECH2_1189','description TECH2_4081','description TECH2_5625','description TECH2_4598','description TECH2_1966','description TECH2_2573','description TECH2_1800','description TECH2_1529', '!','interface Gi3/0/35', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP','description TECH2_1507','description TECH2_1189','description TECH2_4081','description TECH2_5625','description TECH2_4598','description TECH2_1966','description TECH2_2573','description TECH2_1800','description TECH2_1529', '!','interface Gi3/0/41', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP','description TECH2_1507','description TECH2_1189','description TECH2_4081','description TECH2_5625','description TECH2_4598','description TECH2_1966','description TECH2_2573','description TECH2_1800','description TECH2_1529', '!','interface Gi3/0/25', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP','description TECH2_1507','description TECH2_1189','description TECH2_4081','description TECH2_5625','description TECH2_4598','description TECH2_1966','description TECH2_2573','description TECH2_1800','description TECH2_1529', '!',['interface Gi3/0/43', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP','description TECH2_1507','description TECH2_1189','description TECH2_4081','description TECH2_5625','description TECH2_4598','description TECH2_1966','description TECH2_2573','description TECH2_1800','description TECH2_1529', '!','interface Gi3/0/23', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP','description TECH2_1507','description TECH2_1189','description TECH2_4081','description TECH2_5625','description TECH2_4598','description TECH2_1966','description TECH2_2573','description TECH2_1800','description TECH2_1529', '!','interface Gi3/0/19', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP','description TECH2_1507','description TECH2_1189','description TECH2_4081','description TECH2_5625','description TECH2_4598','description TECH2_1966','description TECH2_2573','description TECH2_1800','description TECH2_1529', '!','interface Gi3/0/39', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP','description TECH2_1507','description TECH2_1189','description TECH2_4081','description TECH2_5625','description TECH2_4598','description TECH2_1966','description TECH2_2573','description TECH2_1800','description TECH2_1529', '!',

我已经尝试过在data2上将其划分为for和len，但是当我这样做时，它会将列表中的所有数据排在一起。

            for line1 in data1:
                words1 = line1.split()
                if len(words1) > 0:
                    local = ''.join(words1[0:1])
                    config1.append('interface ' + local)
                    config1.append('power inline static max 30000')
                    config1.append('spanning-tree portfast')
                    description = ''.join(data2[:1])
                    config1.append('description ' + description)
                    config1.append('!')  # totally optional
                    hostname = None

预期的列表值应该如下所示.

expected_config1 = ['interface Gi3/0/13', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP', '!', 'interface Gi3/0/7', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_1507', '!', 'interface Gi1/0/11', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_1189', '!', 'interface Gi3/0/35', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_4081', '!', 'interface Gi3/0/41', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_5625', '!', 'interface Gi3/0/25', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_4598', '!', 'interface Gi3/0/43', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_1966', '!', 'interface Gi3/0/23', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_2573', '!', 'interface Gi3/0/19', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_1800', '!', 'interface Gi3/0/39', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_1529', '!']

谢谢

Answer 1

问题在于data2的处理，否则您的总体附加策略是正确的。

首先，您总是只获取data2的第一个元素。一种解决方案是维护一个单独的计数器(此处为kdt)，它在每次执行附加阶段时都会增加，从而跟踪要追加哪个data2元素，

data2 = ['TECH2_HELP', 'TECH2_1507', 'TECH2_1189', 'TECH2_4081', 'TECH2_5625', 'TECH2_4598', 'TECH2_1966', 'TECH2_2573', 'TECH2_1800', 'TECH2_1529']

config1 = []
data1 = ['Gi3/0/13 some more text']*len(data2)

kdt = 0
for line1 in data1:
    words1 = line1.split()
    if len(words1) > 0:
        local = ''.join(words1[0:1])
        config1.append('interface ' + local)
        config1.append('power inline static max 30000')
        config1.append('spanning-tree portfast')
        description = data2[kdt]
        config1.append('description ' + description)
        config1.append('!')  # totally optional
        hostname = None
        kdt += 1

print config1

这些指纹：

['interface Gi3/0/13', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_HELP', '!', 'interface Gi3/0/13', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_1507', '!', 'interface Gi3/0/13', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_1189', '!', 'interface Gi3/0/13', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_4081', '!', 'interface Gi3/0/13', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_5625', '!', 'interface Gi3/0/13', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_4598', '!', 'interface Gi3/0/13', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_1966', '!', 'interface Gi3/0/13', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_2573', '!', 'interface Gi3/0/13', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_1800', '!', 'interface Gi3/0/13', 'power inline static max 30000', 'spanning-tree portfast', 'description TECH2_1529', '!']

第二个问题是，通过使用data2[0:1]，您实际上创建了一个包含一个字符串( data2的第一个元素)的列表。如果不加入，这将导致尝试将字符串和列表与该行中的+连接起来，

config1.append('description ' + description)

我猜这就是你看到的错误。通过通过索引访问正确的元素，您实际上是在检索一个字符串，因此不需要连接操作。