我有一个csv和tsv文件，我必须创建成一个字典和列表。我必须把他们结合起来，以获得一个特定的输出，但我一直得到这个“列表索引超出范围”的错误，我不知道我必须做什么。
这是我一直在使用的代码。import csv

def make_happy_dict():
        filename = 'happiness.csv'
        happy_dict = {}
        with open(filename, "r") as infile:
            infile.readline()
            happy_csv = csv.reader(infile)
            for row in happy_csv:
                happy_dict[row[0]] = row[2]
        return happy_dict

    def read_gdp_data():
        Data = []
        countries = open("world_pop_gdp.tsv", 'r')
        Lines = countries.readlines()

        happy_dict = make_happy_dict()  # Step 1

        for line in Lines:
            line = line.split("\t")
            country = line[0].strip()  # Get the country name
            line[1] = line[1].replace(",","")
            line[2] = line[2].replace('$',"")
            line[2] = line[2].replace(',',"")
            line[2] = line[2].replace('\n',"")
            happiness = happy_dict.get(country)  # Step 2
            if happiness is not None:  # Step 3
                line.append(happiness)
            Data.append(line)
        return Data

    def main():
        GDP = read_gdp_data()
        for index in GDP:
            print(index[0]+","+index[1]+","+index[2]+","+index[3])  # Step 4
    
    main()

我已经能够打印字典，然后他们自己的名单成功，但不能在一起。