Example code to generate three renderings of a modified metabolic map, highlighting a specific set of pathways.

kgml_ex3.py

import KGML_parser
from KGML_scrape import retrieve_KEGG_pathway
from KGML_vis import KGMLCanvas

# Get list of pathway elements to enhance
glyc_path = retrieve_KEGG_pathway('ko00010')
tca_path = retrieve_KEGG_pathway('ko00020')
enhance_list = []
for pathway in (glyc_path, tca_path):
    for e in pathway.entries.values():
        enhance_list.extend(e.name.split())
enhance_list = set(enhance_list)

# Get the pathway we want to render, and make all the lines
# that are also in glycolysis or TCA pathways thicker
met_pathway = retrieve_KEGG_pathway('ko01100')
mod_list = [e for e in met_pathway.entries.values() if \
                len(set(e.name.split()).intersection(enhance_list))]
for e in mod_list:
    for g in e.graphics:
        g.width = 10
kgml_map = KGMLCanvas(met_pathway, show_maps=True)
kgml_map.draw('ex3_thick.pdf')
    
# Thin out any lines that aren't in the glycolysis/TCA pathways
mod_list = [e for e in met_pathway.entries.values() if \
                not len(set(e.name.split()).intersection(enhance_list)) \
                and e.type != 'map']
for e in mod_list:
    for g in e.graphics:
        g.width = .4
kgml_map.draw('ex3_thin.pdf')

# Or turn them grey, maybe:
for e in mod_list:
    for g in e.graphics:
        g.fgcolor = '#CCCCCC'
kgml_map.draw('ex3_grey.pdf')