英文:
Unable to parse JSON from file using Python3
问题
for crf in crf_ranges:
vmaf_output_crf_list_log = job['config']['output_dir'] + '/' + build_name(stream) + f'/vmaf_{crf}.json'
# read the vmaf_output_crf_list_log file and get value from ["pooled_metrics"]["vmaf"]["harmonic_mean"]
with open(vmaf_output_crf_list_log, 'r') as json_vmaf_file:
# load the json_string["pooled_metrics"] into a python dictionary
vm = json.load(json_vmaf_file)
vmaf_values.append((crf, vm["pooled_metrics"]["vmaf"]["harmonic_mean"]))
这段代码应该可以正常加载你的JSON文件，并获取所需的值。确保你已经导入了json模块。如果你仍然遇到问题，可能是JSON文件本身有一些不可见的问题，你可以尝试使用其他JSON验证工具来检查文件的有效性。
英文:
I'm trying to get the value of ["pooled_metrics"]["vmaf"]["harmonic_mean"] from a JSON file I want to parse using python. This is the current state of my code:
for crf in crf_ranges:
vmaf_output_crf_list_log = job['config']['output_dir'] + '/' + build_name(stream) + f'/vmaf_{crf}.json'
# read the vmaf_output_crf_list_log file and get value from ["pooled_metrics"]["vmaf"]["harmonic_mean"]
with open(vmaf_output_crf_list_log, 'r') as json_vmaf_file:
# load the json_string["pooled_metrics"] into a python dictionary
vm = json.loads(json_vmaf_file.read())
vmaf_values.append((crf, vm["pooled_metrics"]["vmaf"]["harmonic_mean"]))
This will give me back the following error:
AttributeError: 'dict' object has no attribute 'loads'
I always get back the same AttributeError not matter if I use "load" or "loads".
I validated the contents of the JSON, which is valid using various online validators, but still, I am not able to load the JSON for further parsing operations.
I expect that I can load a file that contains valid JSON data. The content of the file looks like this:
{
"frames": [
{
"frameNum": 0,
"metrics": {
"integer_vif_scale2": 0.997330,
}
},
],
"pooled_metrics": {
"vmaf": {
"min": 89.617207,
"harmonic_mean": 99.868023
}
},
"aggregate_metrics": {
}
}
Can somebody provide me some advice onto this behavior, what does it seem so absolutely impossible to load this JSON file?
答案1
得分: 0
loads是json库的一个方法，如文档所述https://docs.python.org/3/library/json.html#json.loads。在这种情况下，您遇到了一个AttributeError，这意味着您可能已经创建了另一个名为"json"的变量，当您调用json.loads时，它调用了那个变量，因此它不会有一个loads方法。
英文:
loads is a method for the json library as the docs say https://docs.python.org/3/library/json.html#json.loads. In this case you are having a AttributeError this means that probably you have created another variable named "json" and when you call json.loads is calling that variable hence it won't have a loads method.
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