使用pkg_resources在python包的当前发行版中加载JSON文件

Question

I am building a package that has the following directory structure -

terraai_preprocessing
|setup.py
||MANIFEST.in
|terraai_preprocessing
  |__init__.py
  |combinatorics
  |preprocessing
    |__init__.py
    |config.json
    |pp_main.py
    |pp_helpers.py

I am trying to load config.json into pp_helpers.py using pkg_resources, as mentioned on other similar questions. I am sure the file exists because -

>>print resource_exists('terraai_preprocessing.preprocessing', 'config.json')
>>True

I have tried using the following but ended up with errors, -

>>with open(resource_filename('terraai_preprocessing.preprocessing', 'config.json'),'r') as f:
    config = json.load(f)
ValueError: No JSON object could be decoded

 >>config = json.loads(resource_filename('terraai_preprocessing.preprocessing', 'config.json'))
ValueError: No JSON object could be decoded

 >>config = json.loads(resource_stream('terraai_preprocessing.preprocessing', 'config.json'))
enter code here

 >>config = json.loads(resource_string('terraai_preprocessing.preprocessing', 'config.json'))
ValueError: No JSON object could be decoded

What am I doing wrong

Answer 1

It has to be like:

with open('data.json', encoding='utf-8') as data_file:
    data = json.loads(data_file.read())

so in your case

 config = json.loads(f.read())

Answer 2

Python could not find the file as the function resource_filename() returns the address with \\\\ as separators. By replacing \\\\ with / it was able to locate the file.

So I used the following code -

>> file_location = resource_filename('terraai_preprocessing.preprocessing','config.json').replace('\\',"/")

>> with open(file_location,'r') as f:
      config = json.load(f)