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To generate a standalone PNG file for a Bokeh application from a single
Python script, pass the script name to ``bokeh png`` on the command
line:

.. code-block:: sh

    bokeh png app_script.py

The generated PNG will be saved in the current working directory with
the name ``app_script.png``.

It is also possible to run the same commmand with jupyter notebooks:

.. code-block:: sh

    bokeh png app_notebook.ipynb

This will generate an PNG file named ``app_notebook.png`` just like
with a python script.

Applications can also be created from directories. The directory should
contain a ``main.py`` (and any other helper modules that are required) as
well as any additional assets (e.g., theme files). Pass the directory name
to ``bokeh png`` to generate the PNG:

.. code-block:: sh

    bokeh png app_dir

It is possible to generate PNG files for multiple applications at once:

.. code-block:: sh

    bokeh png app_script.py app_dir

For all cases, it's required to explicitly add a Bokeh layout to
``bokeh.io.curdoc`` for it to appear in the output.

    )absolute_importdivisionprint_functionunicode_literalsN   )get_screenshot_as_pngcreate_webdriverterminate_webdriver   )set_single_plot_width_height   )FileOutputSubcommand)PNGc            	       st   e Zd ZdZdZdZdZed de	de
dddfd	e	d
e
dddffe  Z fddZdd Zdd Z  ZS )r   zA Subcommand to output applications as standalone PNG files.

    pngz8Create standalone PNG files for one or more applicationsz--heightZHEIGHTzJThe desired height of the exported layout obj only if it's a Plot instanceN)metavartypehelpdefaultz--widthZWIDTHzIThe desired width of the exported layout obj only if it's a Plot instancec                s.   t  | _ztt| | W dt| j X dS )z


        N)r   driversuperr   invoker	   )selfargs)	__class__ <lib/python3.7/site-packages/bokeh/command/subcommands/png.pyr   s   s    z
PNG.invokec          	   C   sX   |  ||}|dkr$tjj| n"t|d}|| W dQ R X | ||| dS )z


        -zw+bN)file_contentssysstdoutbufferwriteioopenZafter_write_file)r   r   filenamedoccontentsfr   r   r   
write_file}   s    zPNG.write_filec             C   sF   t ||j|jd t|| jd}t }||d |d |	 S )z


        )widthheight)r   r   r   )
r   r)   r*   r   r   r"   BytesIOZsaveseekread)r   r   r%   ZimageZbufr   r   r   r      s    
zPNG.file_contents)__name__
__module____qualname____doc__name	extensionr   r   Z	files_argdictintZ
other_argsr   r   r(   r   __classcell__r   r   )r   r   r   R   s&   


r   )r1   Z
__future__r   r   r   r   ZloggingZ	getLoggerr.   logr"   r   Z	io.exportr   r   r	   utilr   Zfile_outputr   __all__r   r   r   r   r   <module>.   s   
