如何在嵌套列表中将元素添加在一起？

Question

我正在尝试将来自 .csv 文件的嵌套列表中的人员的姓氏和名字加在一起。我的数据如下所示： Picture of data spreadsheet

我的列表 peopleNames 具有以下当前输出：

[['Barreuther', 'Mark', '', '', '', '', '', '', '', '', '', '', '', '', '', ''], ['Demaio', 'Daniel', 'Certo', 'Catherine', 'Frankel', 'Stewart', 'Levesque', 'Aime', 'Mahan', 'Eric J.', 'Rosiene', ' Pe', 'Haruta', 'Mako E.', '', '']... many more lists]

我想把相邻的两个字符串加在一起。前任。 [['Barreuther Mark']]。我试过以下代码：

def getInfo():
"""Open csv, read it, get nested list, separate names and schools, return two lists"""

#
with open("CT_schools.csv") as f:
    reader = csv.reader(f)
    data = []
    #start for
    for row in reader:
        data.append(row)               
    #end for

    schoolNames = []
    peopleNames = []

    #start for
    for i in range(len(data)):
        schoolNames.append(data[i][0])
        peopleNames.append(data[i][1:])
    #end for

    index = 0
    name = 0
    NewpeopleNames = []
    #start while
    while index < len(peopleNames):
        for i in range(len(peopleNames)):
            fullName = peopleNames[index][i] + " " + peopleNames[index][i+1]
        NewpeopleNames.append(fullName)
        index = index + 1
        name = name + 2

我得到以下输出：

[' ', 'Pe Haruta', 'Ronald Golbazi', 'Christoph Raskin', ' ', ' ', 'Barry Oliver', ' ', ' ', ' ', ' ', 'Douglad M. ']

然后我用嵌套的 for 循环替换了 while 循环：

#start nested for
    for index in range(len(peopleNames)):
        for name in range(len(peopleNames[index])):
            fullName = peopleNames[index][name] + peopleNames[index][name + 1]

然后我收到一条错误消息，指出它不在列表的索引中。您认为有人可以尝试为我指明正确的方向吗？非常感谢！

Answer 1

嵌套 for 循环是天真的解决方案（如果您不了解代码的复杂性）。

我建议先过滤掉列表中的所有空值，然后才引用 "add the two strings that are next to each other together"。

NewPeopleNames = list()
for sub_list in peopleNames:
    tmp_list = list()
    filtered_list = list(filter(None, sub_list))
    for i in range(0, len(filtered_list), 2):
        if i+1 >= len(filtered_list):
            print('There is no last name for \'{0}\''.format(filtered_list[i]))
            continue
        tmp_list.append('{0} {1}'.format(filtered_list[i], filtered_list[i+1]))
    NewPeopleNames.append(tmp_list)

请注意，奇数列表大小（名字没有姓氏）有一点 "protection"。

您可以修改打印行以仅将姓名 (filtered_list[i]) 附加到 NewPeopleNames 列表。

如何在嵌套列表中将元素添加在一起？

How to add elements together in nested list?

for-loop

nested-lists

while-loop

python-3.x