opensky.history returns None

[damsabella]

The function opensky.history returns None and it's very difficult to debug.

If I would like to pull historical takeoff/landing data from LAX, I use the following code.

from traffic.data import opensky

opensky.history('2020-01-01', '2020-01-02', cached=False, departure_airport='LAX')    # returns None

The function correctly sends all 24 hourly requests as expected, however the function output is None. Can anyone explain this?

I use:

• Python 3.9.7
• Traffic==2.6.6
• Ubuntu 20.04

I'm keen to find a solution as quickly as possible, so please let me know if you have any ideas.

[Xavier Olive]

Airports in opensky are encoded with their ICAO identifier. Replace LAX by KLAX.

[Xavier Olive]

I'll close the issue, feel free to reopen if need be.
For general assistance, please prefer https://gitter.im/xoolive/traffic

[damsabella]

Thanks for the help, perhaps this could be updated in the documentation, or the function throws an error if an invalid airport code is provided?

[Xavier Olive]

Actually that's already in the documentation:
https://traffic-viz.github.io/opensky_impala.html#historical-traffic-data

How would you rephrase it? (PR welcome! 😄 )

[damsabella]

The issue persists even using the ICAO identifier of the airport. I don't want to create a new issue but there is a problem with running long opensky.history(start, stop, departure_airport || arrival_airport) jobs. I'm trying to pull months of data which takes a long time to run.

The progress bar will often freeze, requiring the script to be restarted (potentially related, but also another issue)

I still encounter the same issue that opensky.history returns None. This is very frustrating given the job takes so long to execute.

[Xavier Olive]

If things freeze, it's certainly a connection issue.
For this granularity, I would download data day per day (and save the results each time).

[wtroisey]

Hi,

I'm encountering the same issue as above but none of the solutions above are working for me.

I'm trying to get a list of all departures from LAX between two dates in Jan 2017.

traffic version 2.6.6

from traffic.data import opensky

flights = opensky.history(
    start='some datetime',
    stop='some datetime',
    departure_airport='KLAX',
    arrival_airport=None,
    icao24=None,
    cached=False
)

print(flights) # > None

Please can you advise where I'm going wrong?

Regards,
Will

[Xavier Olive]

I cannot reproduce the issue:

from traffic.data import opensky

flights = opensky.history(
    start='2022-01-01 00:00',
    stop='2022-01-01 01:00',
    departure_airport='KLAX',
    arrival_airport=None,
    icao24=None,
    # cached=False
)
flights

If data is empty on your side, it may not be in the database anymore. Please provide the timestamps you requested if you need further assistance.

[wtroisey]

Are you able to reproduce the issue in January 2017 for Bahrain airport, OBBI?

[Xavier Olive]

If it returns None that's because the database is empty for those dates/flight table