write_if_different

extension_helpers.write_if_different(filename, data)

Write data to filename, if the content of the file is different.

This can be useful if e.g. generating .c or .h files, to make sure that Python does not re-build unchanged files.

Parameters:

• filename (str or pathlib.Path) – The file name to be written to.

• data (bytes) – The data to be written to filename.