根据字符串在列表中的位置，将不同的字符串附加到字符串列表中

Question

鉴于以下配置列表

['configuration1A', 'configuration1B', 'configuration1C', 'configuration2A', 'configuration2B', 'configuration2C', 'configuration3A', 'configuration3B', 'configuration3C', 'configuration4A', 'configuration4B', 'configuration4C', 'configuration5A', 'configuration5B', 'configuration5C', 'configuration6A', 'configuration6B', 'configuration6C', 'configuration7A', 'configuration7B', 'configuration7C', 'configuration8A', 'configuration8B', 'configuration8C', 'configuration9A', 'configuration9B', 'configuration9C', 'configuration10A', 'configuration10B', 'configuration10C', 'configuration11A', 'configuration11B', 'configuration11C', 'configuration12A', 'configuration12B', 'configuration12C', 'configuration13A', 'configuration13B', 'configuration13C', 'configuration14A', 'configuration14B', 'configuration14C', 'configuration15A', 'configuration15B', 'configuration15C', 'configuration16A', 'configuration16B', 'configuration16C', 'configuration17A', 'configuration17B', 'configuration17C', 'configuration18A', 'configuration18B', 'configuration18C', 'configuration19A', 'configuration19B', 'configuration19C', 'configuration20A', 'configuration20B', 'configuration20C', 'configuration21A', 'configuration21B', 'configuration21C', 'configuration22A', 'configuration22B', 'configuration22C', 'configuration23A', 'configuration23B', 'configuration23C', 'configuration24A', 'configuration24B', 'configuration24C', 'configuration25A', 'configuration25B', 'configuration25C', 'configuration1A', 'configuration1B', 'configuration1C', 'configuration2A', 'configuration2B', 'configuration2C', 'configuration3A', 'configuration3B', 'configuration3C', 'configuration4A', 'configuration4B', 'configuration4C', 'configuration5A', 'configuration5B', 'configuration5C', 'configuration6A', 'configuration6B', 'configuration6C', 'configuration7A', 'configuration7B', 'configuration7C', 'configuration8A', 'configuration8B', 'configuration8C', 'configuration9A', 'configuration9B', 'configuration9C', 'configuration10A', 'configuration10B', 'configuration10C', 'configuration11A', 'configuration11B', 'configuration11C', 'configuration12A', 'configuration12B', 'configuration12C', 'configuration13A', 'configuration13B', 'configuration13C', 'configuration14A', 'configuration14B', 'configuration14C', 'configuration15A', 'configuration15B', 'configuration15C', 'configuration16A', 'configuration16B', 'configuration16C', 'configuration17A', 'configuration17B', 'configuration17C', 'configuration18A', 'configuration18B', 'configuration18C', 'configuration19A', 'configuration19B', 'configuration19C', 'configuration20A', 'configuration20B', 'configuration20C', 'configuration21A', 'configuration21B', 'configuration21C', 'configuration22A', 'configuration22B', 'configuration22C', 'configuration23A', 'configuration23B', 'configuration23C', 'configuration24A', 'configuration24B', 'configuration24C', 'configuration25A', 'configuration25B', 'configuration25C', 'configuration1A', 'configuration1B', 'configuration1C', 'configuration2A', 'configuration2B', 'configuration2C', 'configuration3A', 'configuration3B', 'configuration3C', 'configuration4A', 'configuration4B', 'configuration4C', 'configuration5A', 'configuration5B', 'configuration5C', 'configuration6A', 'configuration6B', 'configuration6C', 'configuration7A', 'configuration7B', 'configuration7C', 'configuration8A', 'configuration8B', 'configuration8C', 'configuration9A', 'configuration9B', 'configuration9C', 'configuration10A', 'configuration10B', 'configuration10C', 'configuration11A', 'configuration11B', 'configuration11C', 'configuration12A', 'configuration12B', 'configuration12C', 'configuration13A', 'configuration13B', 'configuration13C', 'configuration14A', 'configuration14B', 'configuration14C', 'configuration15A', 'configuration15B', 'configuration15C', 'configuration16A', 'configuration16B', 'configuration16C', 'configuration17A', 'configuration17B', 'configuration17C', 'configuration18A', 'configuration18B', 'configuration18C', 'configuration19A', 'configuration19B', 'configuration19C', 'configuration20A', 'configuration20B', 'configuration20C', 'configuration21A', 'configuration21B', 'configuration21C', 'configuration22A', 'configuration22B', 'configuration22C', 'configuration23A', 'configuration23B', 'configuration23C', 'configuration24A', 'configuration24B', 'configuration24C', 'configuration25A', 'configuration25B', 'configuration25C']

如何在具有特定约束的每个元素（字符串）的末尾附加一个字符串：

• 将 string="1" 添加到前 75 个元素（configuration1A1 等）

• 将 string="2" 添加到接下来的 75 个元素（configuration1A2 等）

• 将 string="3" 添加到最后 75 个元素（configuration1A3 等）

为了在字符串末尾添加字符串，可以执行以下操作

config_numb="1"
configurations_new = [x + config_numb for i in configurations_v1]

到目前为止，我有以下内容

count = 0

for x in configurations_v1:
    
    if count < 75:
        #print(x)
        config_numb="1"
        configurations_new = [x + config_numb for i in configurations_v1]
        
        pass
    elif count >= 75 and count < 150:
        #print(x)
        config_numb="2"
        configurations_new = [x + config_numb for i in configurations_v1]
        pass
    
    elif count >= 150:
        #print(x)
        config_numb="3"
        configurations_new = [x + config_numb for i in configurations_v1]
        pass
    
    count += 1

但这会创建一个需要 len() 的列表，但是，不是让配置列表中的所有元素都以各自的 config_numb 结尾，而是每个元素都是 configuration25C3。

['configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3', 'configuration25C3']

我知道this question，但那只考虑附加相同的字符串，这不是这里的问题。

Answer 1

这里的问题是列表推导遍历整个可迭代对象并创建一个新列表，您可以为值添加条件，但实际上迭代可能更容易被人们理解，还有一点需要注意的是字符串是 immutable 即当您说修改时，您实际上是在创建一个新字符串。试试这个：

configurations_new = configurations_v1.copy()
for index, value in enumerate(configurations_v1):
    if index < 75:
        configurations_new[index] = configurations_new[index] + '1'
    elif index < 150:
        configurations_new[index] = configurations_new[index] + '2'
    else:
        configurations_new[index] = configurations_new[index] + '3'

使用列表推导式编写时是：

configurations_new = [i + '1' if index < 75 else i + '2' if index < 150 else i + '3' for index, i in enumerate(configurations_v1)]