test_merge_config_v1.py

from tiddlyweb.util import merge_config

from tiddlyweb.config import config as global_config
from tiddlywebconfig import config as custom_config


print "BEFORE: custom", custom_config["instance_tiddlers"]
print "BEFORE: global", global_config["instance_tiddlers"]

merge_config(global_config, custom_config)
global_config["instance_tiddlers"]["system"] = ["def", "ault"]

print "AFTER: custom", custom_config["instance_tiddlers"]
print "AFTER: global", global_config["instance_tiddlers"]

assert "cus" in custom_config["instance_tiddlers"]["system"]
assert "tom" in custom_config["instance_tiddlers"]["system"]

test_merge_config_v2.py

from tiddlyweb.util import merge_config

from tiddlyweb.config import config as global_config


custom_config = {
    "foo": "lorem",
    "bar": "ipsum",
    "instance_tiddlers": {
        "system": ["cus", "tom"]
    }
}

print "BEFORE: custom", custom_config["instance_tiddlers"]
print "BEFORE: global", global_config["instance_tiddlers"]

merge_config(global_config, custom_config)
global_config["instance_tiddlers"]["system"] = ["def", "ault"]

print "AFTER: custom", custom_config["instance_tiddlers"]
print "AFTER: global", global_config["instance_tiddlers"]

assert "cus" in custom_config["instance_tiddlers"]["system"]
assert "tom" in custom_config["instance_tiddlers"]["system"]

tiddlywebconfig.py

config = {
    "foo": "lorem",
    "bar": "ipsum",
    "instance_tiddlers": {
        "system": ["cus", "tom"]
    }
}