值错误（第 7 行名称、主页）

Question

import csv

students = []

with open("stu1.csv") as file:
    reader = csv.reader(file)
    for name, home in reader:
        students.append({"name": name}, {"home": home})

for student in sorted(students, key =lambda student:student["name"]):
    print(f"{student['name']} is from {student['home']}")

stu1.csv 包含以下数据

Harry, Number, Pivet Drive
Ron, The burrow
Draco, Malfoy manor

Answer 1

你们非常亲密。实际上有2个错误。

1. 有 3 列（第一行），您正在解压 2 个值。

2. append()

   需要1个字典，但你传递了2个字典。

修复错误后，这可以工作：

import csv

students = []

f = "C:\\test\\test_file.csv"
with open(f) as file:
    reader = csv.reader(file)
    for name, home in reader:
        students.append({"name": name, "home": home})


for student in sorted(students, key =lambda student:student["name"]):
    print(f"{student['name']} is from {student['home']}")

返回这个：

Draco is from  Malfoy manor
Harry is from  Number
Ron is from  The burrow

Answer 2

就上下文而言，我相信这来自 CS50 讲座 (https://www.youtube.com/watch?v=nLRL_NcnK-4&t=28335s&ab_channel=freeCodeCamp.org)，时间为 8:00:00 - 8:12： 09.

在他的示例中，David Malan 的输入文件为：

Harry,"Number Four, Privet Drive"
Ron, The burrow
Draco, Malfoy manor

请注意，

,

之后的第一行文本跨越

""

内部，这使得

csv.reader()

将其识别为单个元素，并且不会引发

ValueError: too many values to unpack