得到 JSONDecodeError：期望值：第 1 行第 1 列（字符 0）

Question

代碼：

import streamlit as st
import json
import requests
import numpy as np

URI = 'http://127.0.0.1:5000'

st.title('Newral Network Visualizer')
st.sidebar.markdown('## Input image')

if st.button('Get random prediction'):
    response = requests.post(URI, data={})
    response = json.loads(response.text)
    

Output：

JSONDecodeError: Expecting value: line 1 column 1 (char 0)

追溯：

 File "c:\users\niloy\anaconda3\lib\site-packages\streamlit\ScriptRunner.py", line 322, in _run_script
    exec(code, module.__dict__)
 File "C:\Users\Niloy\Downloads\Digit classifier with flask\app.py", line 14, in <module>
    response = json.loads(response.text)
 File "c:\users\niloy\anaconda3\lib\json\__init__.py", line 348, in loads
    return _default_decoder.decode(s)
 File "c:\users\niloy\anaconda3\lib\json\decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
 File "c:\users\niloy\anaconda3\lib\json\decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None

Answer 1

您的文件不是 json 格式。 如果您嘗試從文件中讀取 json 值，您必須這樣做： import json

import json
file = 'filename.txt'
with open(file,'r') as f:
    x = json.load(f)
    print(x)