Function infer_format

plotly/io/_kaleido.py:206–222

(path: Union[Path, None], format: Union[str, None])

def infer_format(path: Union[Path, None], format: Union[str, None]) -> Union[str, None]:
    if path is not None and format is None:
        ext = path.suffix
        if ext:
            format = ext.lstrip(".")
        else:
            raise ValueError(
                f"""
Cannot infer image type from output path '{path}'.
Please specify the type using the format parameter, or add a file extension.
For example:

    >>> import plotly.io as pio
    >>> pio.write_image(fig, file_path, format='png')
"""
            )
    return format


def to_image(