如何使用Python将新数据插入JSON文件
我的python代码有一些问题。 我想在json文件中插入新数据 file.json如何使用Python将新数据插入JSON文件,python,arrays,json,Python,Arrays,Json,我的python代码有一些问题。 我想在json文件中插入新数据 file.json { "datas": [ { "KD": "AC0001", "TI": "24", "TO": "25", "AR": "7.21", "SG": "100", "DT": "2019-02-12 10:44:10" } ] } 我想插入新行,就像这样 { "datas": [ {
{
"datas": [
{
"KD": "AC0001",
"TI": "24",
"TO": "25",
"AR": "7.21",
"SG": "100",
"DT": "2019-02-12 10:44:10"
}
]
}
我想插入新行,就像这样
{
"datas": [
{
"KD": "AC0001",
"TI": "24",
"TO": "25",
"AR": "7.21",
"SG": "100",
"DT": "2019-02-12 10:44:10"
},{
"KD": "AC0001",
"TI": "23",
"TO": "21",
"AR": "7.21",
"SG": "90",
"DT": "2019-02-12 10:44:10"
}
]
}
这是我的密码
student_data = {"data": []}
data_holder = student_data["data"]
counter = 0
data_holder.append({'KD': 'AC0001','TI': '23','TO': '21','AR': '7.21,'SG': '90','DT': '2019-02-12 10:44:10'})
with open('file.json') as f:
data = json.load(f)
data.update(student_data)
file_path = 'file.json'
with open(file_path, 'w') as outfile:
print("writing file to: ", file_path)
# HERE IS WHERE THE MAGIC HAPPENS
json.dump(data, outfile, indent=2, ensure_ascii=False)
outfile.close()
print("done")
实际上这是代码更新json文件,而不是插入新数据您可以尝试以下操作吗:
import json
new_data = {'KD': 'AC0001', 'TI': '23', 'TO': '21',
'AR': '7.21', 'SG': '90', 'DT': '2019-02-12 10: 44: 10'}
file_path = 'file.json'
with open(file_path) as f:
data = json.load(f)
data['datas'].append(new_data)
with open(file_path, 'w') as outfile:
json.dump(data, outfile)
我是一个Java人,但我在这里没有看到任何Java代码——为什么是Java问号?为什么不删除第一行,然后将脚本顶部的
json
加载为student\u data=json.load(f)
?修复data\u holder.append(…
行)中的语法错误。即使如此,语法高亮显示也会告诉您它已被破坏。。。