通过读取 python 中的 CSV 输入来创建对象并将它们添加到列表中

Question

This is currently my code for reading through a CSV file, Creating a person object, and adding each person to a list. One line Example input: John,Langley,1,2,2,3,5

When i print(per) each time after creating a person object. My output is correct, but as soon as i add that person to the list i made, the numeric values AKA 'traits' for that person are all the same as the last persons traits in the CSV file.

For Example:

John,Langley,1,2,2,3,5 --(add to list)-->John,Langley,1,1,1,1,1

Isabel,Smith,3,2,4,4,0 --(add to list)-->Isabel,Smith,1,1,1,1,1

John,Doe,1,1,1,1,1 --(add to list)-->John,Doe,1,1,1,1,1

This is impacting me with continuing because i need the person objects' traits to be valid in order to perform analysis on them in the next couple methods. PLEASE IGNORE MY PRINT STATEMENTS. THEY WERE FOR MY DEBUGGING PURPOSES

def read_file(filename):
    file = open(filename, "r", encoding='utf-8-sig')
    Traits_dict = {}
    pl = []
    next(file)
    for line in file:
        line = line.rstrip('\n')
        line = line.split(',')
        first = str(line[0].strip())
        last = str(line[1].strip())
        w = line[2].strip()
        hobby = line[3].strip()
        social = line[4].strip()
        eat = line[5].strip()
        sleep = line[6].strip()
        Traits_dict["Work"] = w
        Traits_dict["Hobbies"] = hobby
        Traits_dict["Socialize"] = social
        Traits_dict["Eat"] = eat
        Traits_dict["Sleep"] = sleep
        per = Person(first, last, Traits_dict)
        print(per)
        pl.append(per)
    print(pl[0])
    print(pl[1])
    print(pl[2])
    print(pl[3])
    print(pl[4])
    return pl

Answer 1

All the Traits_dict = {} are the same to all object since you initiating the dict before the loop so it's giving each Person object the same dict reference in it. You can put the Traits_dict = {} inside the loop that it will create each Person a new dict

for line in file:
    Traits_dict = {}