style = r"""
<prologue>
<<!--
file generated by <program>
<command_loop><command_line_loop> <command_data><end><end>
You must add x= and y= with suitable vertex positions.
Some lines may need manual bending to render properly.
-->>
<<feynml>>
<diagram>
<back>
<<diagram
id="Diagram<diagram_index>"
incoming="<legs_in>"
outgoing="<legs_out>"
sign="<sign>"
symmmetry_factor="<symmetry_factor>"
>>
<vertex_loop>
<<vertex id="Vert<vertex_index>">>
<</vertex>>
<end>
<in_loop>
<<leg id="In<in_index>">>
<<name>><field><</name>>
<<sense>>incoming<</sense>>
<<target>>Vert<vertex_index><</target>>
<<momentum>>
<<name>><momentum><</name>>
<</momentum>>
<</leg>>
<end>
<out_loop>
<<leg id="Out<out_index>">>
<<name>><field><</name>>
<<sense>>outgoing<</sense>>
<<target>>Vert<vertex_index><</target>>
<<momentum>>
<<name>><momentum><</name>>
<</momentum>>
<</leg>>
<end>
<propagator_loop>
<<propagator id="Prop<propagator_index>">>
<<name>><field><</name>>
<<source>>Vert<dual-vertex_index><</source>>
<<target>>Vert<vertex_index><</target>>
<<momentum>>
<<name>><momentum><</name>>
<</momentum>>
<</propagator>>
<end>
<</diagram>>
<epilogue>
<</feynml>>
<<!-- end -->>
<exit>
"""
"""Style for qgraf to produce feynml."""
[docs]def get_style() -> str:
"""Get the style for qgraf to produce feynml."""
global style
return style