如何正确判断Python字典的payload中是否包含token字段？

Your current code is comparing the entire payload dictionary directly to the string 'token'—which will never evaluate to true, since message['payload'] is a dictionary, not a string. To properly check if the payload dictionary contains the key "token", you need to use Python's in operator, which checks for the presence of a key in a dictionary.

Fixed Code #

Here's the adjusted version of your code with the correct check:

if 'token' in message['payload']:
    print("GOT IT"); print(message)
elif message['type'] == 'timedout':  # Note: 'type' is a top-level key, not inside payload!
    print("TIMEDOUT!")
elif 'locked' in message['payload']:  # Assuming 'locked' is a key in payload
    print("LOCKED!")
done.set()

Key Explanations: #

• 'token' in message['payload']: This is the right way to verify that the payload dictionary has a "token" key. The in operator checks if the specified key exists in the dict, regardless of its value.
• I fixed the timedout condition: In your original dictionary, 'type' is a top-level key (not nested inside payload), so message['type'] is the correct way to access it—your original code would have thrown a KeyError here.
• For the locked check, I assumed you want to verify if "locked" is a key in payload (following the same pattern as the token check). Adjust this if your actual use case differs.

内容的提问来源于stack exchange，提问作者Arya