从一行中拆分字符串并附加到 python 3 中的列表中

Question

我有一个文件，其中每一行都包含以下格式我想编写一个函数来获取关键字 "Main value" 并搜索它并给出输出。

文件格式：

Main value:value_name,value (1):value_name1,value (2):value_name2 and so on...

需要输出：

Feature name: Main value
Technical name: value_name
Possible values: value_name1
                 value_name2
                 value_name3 and so on...
Possible variables: value (1)
                    value (2)
                    value (3) and so on...

到目前为止的代码：

def get_feature_infos(file_path, feature_name):
    technical_name = []
    possible_variables = []
    possible_names = []
    with open(file_path, "r") as commands_library:
        for line in commands_library:
            if feature_name in line:
                technical_name.append((line.split(",")[0]).split(":")[1])
                possible_variables.append(line.split(",")[1].split(":")[0])
                possible_names.append(line.split(",")[1].split(":")[1])

        print ("   Technical name: ", technical_name[0])
        print ("   Possible values: ", possible_variables[0])
        print ("   Possible variables: ", possible_names[0])

但这只打印第一个可能的值，但我想要所有可能的值

Answer 1

我相信您正在寻找的是一种打印列表中的值列表的方法，而不管列表的命名方式如何。您可以做的是创建一个文本列表。例如：

print ("   Technical name: ", ', '.join(technical_name))

您可能还想在打印前通过创建元组来转置输出：

tups = zip(*(technical_name, possible_variables, possible_names))
for tup in tups:
    print('{}\t{}\t{}'.format(tup))

Answer 2

试试这个。它对我有用：

def get_feature_infos(file_path, feature_name):
    technical_name = []
    possible_variables = []
    possible_names = []
    data = []
    with open(file_path, "r") as commands_library:
        for line in commands_library:
            if feature_name in line:
                technical_name.append((line.split(",")[0]).split(":")[1])

            data = (line.split(","))
            data.pop(0)

            for shortData in data:
                possible_variables.append(shortData.split(":")[0])
                possible_names.append(shortData.split(":")[1])

        print ("   Technical name: ", technical_name[0])
        print ("   Possible variables: ", possible_variables)
        print ("   Possible names: ", possible_names)

Answer 3

我给大家介绍一下str.split-maxsplit的第二个参数。

使用maxsplit，您可以拆分"Main value"，其余的：

feature_name, rest = line.split(':', 1)

然后 value_name 和其余的：

technical_name, rest = rest.split(',', 1)

然后 possible_variables 和 possible_names

possible_variables = [x.split(':')[0] for x in rest.split(',')]
possible_names = [x.split(':')[1] for x in rest.split(',')]

从一行中拆分字符串并附加到 python 3 中的列表中

spliting string from a line and appending in a list in python 3

python

text

list

python-3.x