从一行中分割字符串并在python 3中追加一个列表

Question

I have a file which contains with following format in each line I want to write a function which gets the keyword "Main value" and searches for it and gives output.

File format:

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

Output required:

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...

Code till now:

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])

But this prints only the first possible values but I want all the possible values

Answer 1

What I believe you are looking for is a way to print a list of values in a list regardless of how the list is named. What you can do is to create a text list. For example:

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

You may also want to transpose the output by creating tuples before you print:

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

Answer 2

Try this. It worked for me:

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

Let me introduce the second argument of str.split - maxsplit to you.

With maxsplit , you can split "Main value" and the rest:

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

then the value_name and the rest:

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

then possible_variables and possible_names

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