def iter_python_expressions(self, expr):
"""Iterates over translatable python expressions in a TALES expression.
Yields each Python expression in the TALES expression that has an
underscore call in it.
"""
if not UNDERSCORE_CALL.search(expr):
# Short-circuit when there's nothing we're interested in
raise StopIteration
for part in split_parts.split(expr):
part = part.strip()
prefix = match_prefix(part)
if prefix is not None:
part = part[len(prefix.group(0)):]
elif part.startswith('structure '):
# Backwards compatibility for structure as a keyword
part = part[10:]
if UNDERSCORE_CALL.search(part):
yield part
def split_expression(source, default_engine):
for part in split_parts.split(source):
expression = part.strip().replace("\\|", "|")
yield get_tales_engine(expression, default_engine)
def split_expression(source, default_engine):
for part in split_parts.split(source):
expression = part.strip().replace('\\|', '|')
yield get_tales_engine(expression, default_engine)