To ignore a particular import which should be allowed unconditionally, use the tach-ignore comment directive.

# tach-ignore
from core.main import private_function

from core.api import private_calculation  # tach-ignore

from core.package import (  # tach-ignore
    service_one,
    service_two
)

The directive can also be specific about the import to ignore, which is particularly useful when importing multiple packages.

# tach-ignore private_function
from core.main import private_function, public_function

from core.api import private_calculation, public_service  # tach-ignore private_calculation

from core.package import (  # tach-ignore service_two
    service_one,
    service_two
)

Note: Names given to tach-ignore should match the alias as it is used in the subsequent import line, not the full module path from the project root.

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Reasons

Tach also allows you to add a message next to the ignore directive, to document the reasoning for the ignore.

# tach-ignore(Alternative API not yet available 11/26/24) private_api
from core.api import private_api