[BUG] TeamId and DriverId missing in FP1/2/3 before race

[borolepratik]

Describe the issue:

TeamId and DriverId missing for all drivers in 2025 Las Vegas GP Practice 1

Reproduce the code example:

import fastf1

# Parameters
year = 2025
grand_prix = 22
session = 1

# Load session data
session = fastf1.get_session(year, grand_prix, session)
session.load()

session.results

Error message:

[borolepratik]

TeamId and DriverId not available for practice 2 and practice 3 but available for qualifying.

[theOehrly]

This is expected since Jolpica does not (yet) support practice sessions. FastF1 instead uses data from the race for these sessions. Therefore, the data is only available after the race. This has always been the case.
Qualifying is supported by Jolpica, therefore, this works immediately.

Since Jolpica is working on support for FP1/2/3 I will likely not implement alternative solutions for this and instead wait until this data is properly available.

[borolepratik]

jolpica/jolpica-f1#138

[CodersAcademy006]

I'm seeing this as well. It appears to be an issue with the upstream source data not providing TeamId entries for this specific session, rather than a bug in the library itself.

As a temporary workaround, you can patch the results DataFrame by mapping driver abbreviations to teams manually:

# Partial map example for 2025 grid
team_map = {
    'VER': 'red_bull', 'HAM': 'ferrari', 
    'NOR': 'mclaren', 'RUS': 'mercedes'
}

# Apply mapping to fill missing TeamIds
session.results['TeamId'] = session.results['Abbreviation'].map(team_map).fillna('unknown')

[borolepratik]

@CodersAcademy006 maybe this patch can be expanded to include TeamIDs for rookie FP1 drivers as well? Possibly, an issue with "backporting" TeamIDs can arise when a driver drives for 2 different teams in a single season (think Bearman in 2024).