![]() ![]() ![]() The tail_name and head_name strings are separatedīy (optional) colon(s) into node name, port name, Label ( Optional) – Caption to be displayed near the edge.Īttrs – Any additional edge attributes (must be strings). property directed : bool ¶īool edge ( tail_name, head_name, label = None, _attributes = None, ** attrs ) ¶Ĭreate an edge between two nodes. ![]() ReturnsĪn independent copy of the current object. Keep_attrs ( bool) – preserve graph/node/egde_attr mappings Return typeĭOT source comment for the first source line. Reset content to an empty body, clear graph/node/egde_attr mappings. Verbatim DOT source lines including final newline. See the usage examples in the User Guide. ParametersĪttrs – Attributes to be set (must be strings, may be empty). # noqa: E501 attr ( kw = None, _attributes = None, ** attrs ) ¶Īdd a general or graph/node/edge attribute statement. Strict ( bool) – Rendering should merge multi-edges. Node_attr – Mapping of (attribute, value) pairs set for all nodes.Įdge_attr – Mapping of (attribute, value) pairs set for all edges.īody – Iterable of verbatim lines (including their final newline) Graph_attr – Mapping of (attribute, value) pairs for the graph. Renderer ( Optional) – Output renderer used ( 'cairo', 'gd', …).įormatter ( Optional) – Output formatter used ( 'cairo', 'gd', …).Įncoding ( Optional) – Encoding for saving the source. Name ( Optional) – Graph name used in the source code.Ĭomment ( Optional) – Comment added to the first line of the source.įilename – Filename for saving the sourceĭirectory – (Sub)directory for source saving and rendering.įormat ( Optional) – Rendering output format ( 'pdf', 'png', …).Įngine ( Optional) – Layout command used ( 'dot', 'neato', …). Graph ( name = None, comment = None, filename = None, directory = None, format = None, engine = None, encoding = 'utf-8', graph_attr = None, node_attr = None, edge_attr = None, body = None, strict = False, *, renderer = None, formatter = None ) ¶ Their division reflects the fact that both graph syntaxes cannot be mixed. directed graphs) have exactly the same API. Return the upstream version number tuple from stderr of dot -V. Open filepath with its default viewing application (platform-specific). Return DOT source piped through unflatten preprocessor as string. Return input_string piped through engine into format as string. Return data ( bytes) piped through engine into format as bytes. ![]() Render file with engine into format and return result filename. TypeError raised if a required argument is missing. RuntimeError raised if the Graphviz executable is not found.ĬalledProcessError raised if a subprocess returncode is not 0. Return string not treating '' as DOT HTML string in quoting. Return string disabling special meaning of backslashes and ''. Graphviz edge length code#Verbatim DOT source code string to be rendered by Graphviz. The library i used here is certainly sturdy enough to handle 80,000 nodes.Directed graph source code in the DOT language. Most graph drawing algorithms use some version of SMACOF, which of course varies the edge length however, the graphviz layout engine 'neato' (supplied as the 2nd argument to 'draw' above) ought to preserve, if at all possible, user-set edge lengths. G.draw('somefolderandfilename.png', format='png', prog='neato') # and you can confirm that introspection by drawing & printing this graph: G.node_attr.update(color="red", style="filled") ![]()
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