def sub(match, **context):
"""
Default tag processor.
Returns the appropriate value from **context for a matched tag.
"""
tag = helpers.get_single_group(match)
if re.search(r"\[.+\]|\.", tag):
# Attribute/Indice lookup
val = utils.unicode(eval(tag, {"__builtins__": None}, context))
else:
# Straight value
val = utils.unicode(context.get(tag, "")) # TODO: Error check
if not val and tag not in context.keys():
warnings.warn(
"No context variable matched the tag %s" % tag,
ContextWarning
)
return val
def register(*tag_list):
"""Register a sequence of tags."""
manager = get_manager()
for tag in tag_list:
manager.add(tag)
LOGGER.info("Registered: %s", utils.unicode(tag))