我有一个使用python中的内存映射打开的json文件。我提供的大小为1024,即使json_file不包含那么多字段。当我执行json.loads(...)
时,会得到Error: raise JSONDecodeError("Extra data", s, end)
。我打开json文件,看到结尾处有NULL
字符。查看此图像:
我不确定加载json文件的正确方法。我打开mmap文件并加载json的代码如下。
The json file has contents shown below:
{
"Gardens": {
"Seaside": {
"@loc": "porch",
"@myID": "1.2.3",
"Tid": "1",
"InfoList": {
"status": {
"@default": "0",
"@myID": "26"
},
"count": {
"@default": "0",
"@myID": "1"
}
},
"BackYard": {
"@loc": "backyard",
"@myID": "75",
"Tid": "2",
"InfoList": {
"status": {
"@default": "6",
"@myID": "32"
},
"count": {
"@default": "0",
"@myID": "2"
}
}
}
}
}
} # There are NULL characters here as doing the mmap fills NULL characters as the size of the file provided is 1024
# Open and read file and MMAP (WRITE access)
json_file = open(json_path, "r+", encoding="utf-8")
mapped_file = mmap.mmap(json_file.fileno(), 1024, access=mmap.ACCESS_WRITE)
# Create the mmap file buffer
mappedFile.seek(0)
file_size = os.path.getsize(json_path)
buffer_for_json = mappedFile[:file_size]
# Content is JSON, so load it
json_data = json.loads(buffer_for_json.decode("utf-8")) # ERROR: raise JSONDecodeError("Extra data", s, end)
我真的迷路了,不确定如何解决这个问题。任何帮助,将不胜感激。 :)
最佳答案
当我一开始不import json
时,这发生在我身上。
默认编码为'utf-8',因此我认为没有必要指定该编码。您也可以尝试json_data = json.loads(buffer_for_json.decode())
或json_data = json.loads(buffer_for_json)
您可以阅读有关json here的更多信息,以及