tetrak_ocr.errors

Exceptions raised by the package.

These exist mainly so that a missing optional backend fails as a library should — with a catchable exception naming the extra to install — rather than by printing to stderr and calling sys.exit(1), which is what the original scripts did. That was reasonable when each file was run directly; it is not, when a caller imports one backend and wants to fall back to another.

Exceptions

MissingBackendError(backend, extra, packages)	A backend was requested but its optional dependency is not installed.
MultiPageNotSupportedError(path, backend, ...)	A multi-frame image was given to a backend that reads only frame 0.
MultiPagePdfError(path, pages)	A searchable PDF was asked for on a document with more than one page.
OcrPipelineError	Base class for every error this package raises.
UnknownBackendError(name, known)	A backend name was requested that does not exist.
UnknownFormatError(name, valid)	An output format was requested that does not exist.