'Save a image of the plot described by `figure_or_data` locally as
`filename`.
Valid image formats are \'png\', \'svg\', \'jpeg\', and \'pdf\'.
The format is taken as the extension of the filename or as the
supplied format.
positional arguments:
- figure_or_data: The figure dict-like or data list-like object that
describes a plotly figure.
Same argument used in `py.plot`, `py.iplot`,
see https://plot.ly/python for examples
- filename: The filepath to save the image to
- format: \'png\', \'svg\', \'jpeg\', \'pdf\'
- width: output width
- height: output height
- scale: Increase the resolution of the image by `scale` amount
Only valid for PNG and JPEG images.
example:
import plotly.plotly as py
fig = {\'data\': [{\'x\': [1, 2, 3], \'y\': [3, 1, 5], \'type\': \'bar\'}]}
py.image.save_as(fig, \'my_image.png\', scale=3)'

@classmethod
def save_as(cls, figure_or_data, filename, format=None, width=None, height=None, scale=None):

    (base, ext) = os.path.splitext(filename)
    if ((not ext) and (not format)):
        filename += '.png'
    elif (ext and (not format)):
        format = ext[1:]
    elif ((not ext) and format):
        filename += ('.' + format)
    img = cls.get(figure_or_data, format, width, height, scale)
    f = open(filename, 'wb')
    f.write(img)
    f.close()
