Python 尝试将csv的第1-10行移动到JSON文件。我好像只有第十行

我是python新手，尝试将csv的第1-10行添加到JSON文件中，但是，我似乎只得到了csv的第10行。我似乎不明白我的论点有什么不正确之处。创建任何帮助应用程序

import csv, json, itertools

csvFilePath = "example.csv"
jsonFilePath = "example.json"

    # Read the CSV and add data to a dictionary
data = {}
with open(csvFilePath) as csvFile:
        csvReader = csv.DictReader(csvFile)
        for csvRow in itertools.islice(csv.DictReader(csvFile), 0,10):
            data = csvRow

print(data)


    #Write the data to a JSON file
    with open(jsonFilePath, "w") as jsonFile:
    jsonFile.write(json.dumps(data, indent=4))

---

在

data=csvRow

时，

data

变量不断被覆盖，因此在末尾，只有您读取的最后一行将位于

data

内。试着这样做：

import csv, json, itertools

csvFilePath = "example.csv"
jsonFilePath = "example.json"

# Read the CSV and add data to a dictionary
data = {}
with open(csvFilePath) as csvFile:
        csvReader = csv.DictReader(csvFile)
        for csvRow in itertools.islice(csv.DictReader(csvFile), 0,10):
            #email = csvRow["email"]
            data[len(data)] = csvRow

print(data)

# Write the data to a JSON file
with open(jsonFilePath, "w") as jsonFile:
    jsonFile.write(json.dumps(line, indent=4))

---

（没有对此进行测试，但想法是添加

csvRow

作为dict

数据的新元素）
假设输入CSV为

1,2,3,4,5
a,b,c,d,e

我们有以下代码：

import json
import csv

inpf = open("test.csv", "r")
csv_reader = csv.reader(inpf)

# here you slice the columns with [2:4] for example
lines = [row[2:4] for row in csv_reader]
inpf.close()


lines_json = json.dumps(lines)
outpf = open("out.json", "w")
outpf.write(lines_json)
outpf.close()

这创造了

[
  [
    "3",
    "4"
  ],
  [
    "c",
    "d"
  ]
]

您正在覆盖文件循环中的
数据
字典

CSV_FILE_PATH = "example.csv"

with open(CSV_FILE_PATH) as myfile:
    # You might set a key for each index as you loop:
    data = {i: next(myfile) for i in range(10)}
print(data)