otp.Source.render_otq#

Source.render_otq(image_path=None, output_format=None, load_external_otqs=True, view=False, line_limit=(10, 30), parse_eval_from_params=False, debug=False, **kwargs)#

Render current Source graph.

Parameters

image_path (str, None) – Path for generated image. If omitted, image will be saved in a temp dir
output_format (str, None) – Graphviz rendering format. Default: png. If image_path contains one of next extensions, output_format will be set automatically: png, svg, dot.
load_external_otqs (bool) – If set to True (default) dependencies from external .otq files (not listed in path param) will be loaded automatically.
view (bool) – Defines should generated image be shown after render.
line_limit (Tuple[int, int], None) – Limit for maximum number of lines and length of some EP parameters strings. First param is limit of lines, second - limit of characters in each line. If set to None limit disabled. If one of tuple values set to zero the corresponding limit disabled.
parse_eval_from_params (bool) – Enable parsing and printing eval sub-queries from EP parameters.
debug (bool) – Allow to print stdout or stderr from Graphviz render.
kwargs – Additional arguments to be passed to onetick.py.Source.to_otq() method (except file_name, file_suffix and query_name parameters)

Return type

Path to rendered image

Examples

>>> data = otp.DataSource(db='US_COMP', tick_type='TRD', symbols='AAA')  
>>> data1, data2 = data[(data['PRICE'] > 50)]  
>>> data = otp.merge([data1, data2])  
>>> data.render_otq('./path/to/image.png')  