如何处理天气API返回数据并在Python中赋值指定字段到变量

Let's walk through this step by step to get the exact values you need:

Step 1: Understand the Response Format #

First off, your API response is a bytes object (the b'...' prefix gives that away) with HTML-escaped quotes (" instead of regular "). We need to fix both of these issues to turn it into a usable Python dictionary.

Step 2: Full Code Implementation #

Here's the complete code to process the response and assign the variables exactly as you want:

import json
import html

# Your raw API response
raw_response = b'{"coord":{"lon":-87.74,"lat":41.9},"weather": [{"id":800,"main":"Clear","description":"clear sky","icon":"01n"}],"base":"stations","main": {"temp":46.49,"feels_like":35.37,"temp_min":45,"temp_max":48.2,"pressure":1018,"humidity":61},"visibility":10000,"wind":{"speed":13.87,"deg":210,"gust":20.8},"clouds":{"all":1},"dt":1606605601,"sys":{"type":1,"id":4861,"country":"US","sunrise":1606568201,"sunset":1606602118},"timezone":-21600,"id":4904381,"name":"Oak Park","cod":200}'

# 1. Convert bytes to a UTF-8 string
response_str = raw_response.decode('utf-8')

# 2. Fix HTML-escaped quotes (turn " back into ")
cleaned_response = html.unescape(response_str)

# 3. Parse the cleaned string into a Python dictionary
weather_data = json.loads(cleaned_response)

# 4. Assign values to your target variables
lon = weather_data['coord']['lon']
lat = weather_data['coord']['lat']
temp = weather_data['main']['temp']
humidity = weather_data['main']['humidity']

# Check if we got the right values
print(f"lon = {lon}")
print(f"lat = {lat}")
print(f"temp = {temp}")
print(f"humidity = {humidity}")

Step 3: What Each Part Does #

• Byte-to-string conversion: APIs often return raw byte data, so decode('utf-8') translates it into a readable string.
• HTML unescaping: The " characters are HTML entities for double quotes. Without fixing this, the JSON parser would throw an error—html.unescape() fixes this quickly.
• JSON parsing: json.loads() turns the cleaned string into a nested Python dictionary, letting you access specific values using their key names.
• Variable assignment: We just traverse the nested keys (coord for longitude/latitude, main for temperature/humidity) to pull the exact values you need.

Step 4: Verify the Output #

When you run this code, you'll get exactly the result you're targeting:

lon = -87.74
lat = 41.9
temp = 46.49
humidity = 61

内容的提问来源于stack exchange，提问作者AlgoTrading