openpyxl.preserve.sourceio

Read package sources without imposing workbook eligibility caps.

funcread_source_bytes(source, *, context='workbook package')

Read package bytes while preserving a seekable stream's position.

paramsourcebytes | path-like | binary file-like

Package bytes, path, or seekable binary stream.

paramcontextstr

= 'workbook package'

Name used in source validation errors.

Returns

bytes

Complete package contents.