Method write

tests/support/xmlunit.py:50–64

(self, b)

            self._second.writelines(lines)

        def write(self, b):
            if isinstance(self._first, io.TextIOBase):
                wrote = self._first.write(b)

                if wrote is not None:
                    # expected to always succeed to write
                    self._second.write(b[:wrote])

                return wrote
            else:
                # file-like object in Python2
                # It doesn't return wrote bytes.
                self._first.write(b)
                self._second.write(b)
                return len(b)

        def fileno(self):
            return self._first.fileno()