Using of boolean flag in python

Question

I am using below code, if i am sending "89" as pressure value and temperature as "Null" in this case it is showing "value not processed". I want it to show message of value processed and also for value not processed what condition i can use in below code.

    payload = [{'id': 'Room1',
    'pressure': {'metadata': {}, 'type': 'Number', 'value': '89'},
    'temperature': {'metadata': {}, 'type': 'Number', 'value': 'Null'},`'type': 'RoomTest'}]`
    attrs = ['temperature', 'pressure']
    x = (len(payload))
    Flag=True
    for i in range(x):
        for j in attrs:
        y = payload[i][j]['value']
        if '' in y or 'Null' in y:
          Flag=False
     if Flag:
         print("successfully processed")
     else:
         print("successfully not processed")

Any help will be appreciated.Thanks

so how can id define empty string in python.Any help on this @CoryKramer — damini chopra
– damini chopra, Commented Nov 14, 2019 at 4:59

chepner · Accepted Answer · 2019-11-13 14:50:12Z

1

I would skip both the flag and the explicit for loop, and use any instead.

if any(p[j]['value'] in ('', 'Null') for p in payload for j in attrs):
    print("successfully not processed")
else:
    print("successfully processed")

answered Nov 13, 2019 at 14:50

chepner

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4 Comments

damini chopra Over a year ago

why we use any here?what is difference between both of them

chepner Over a year ago

any returns true if any of the boolean expressions produced by the generator are true. That's exactly what you are trying to do with your for loop, except you are using an explicit flag to remember when you found a matching condition. any basically sets (and returns) that flag for you.

damini chopra Over a year ago

Thanks @chepner , but for this also it is not sending value instead only shows "successfully not processed"

chepner Over a year ago

What value do you want? In your original, y just ends up being the last payload you check, payload[-1]['pressure']['value'].

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