def update_variables(self, watch, watch_extras, event, whitelist):
self.last_line_no = self.frame.f_lineno
old_local_reprs = self.local_reprs
self.local_reprs = OrderedDict(
(source, my_cheap_repr(value))
for source, value in self.get_local_reprs(watch, watch_extras,
whitelist))
if self.comprehension_type:
for name, value_repr in self.local_reprs.items():
values = self.comprehension_variables.setdefault(name, [])
if not values or values[-1] != value_repr:
values.append(value_repr)
values[:] = truncate_list(values, 11)
if event in ('return', 'exception'):
return [
(name, ', '.join(values))
for name, values in self.comprehension_variables.items()
]
else:
return []
variables = []
for name, value_repr in self.local_reprs.items():
if name not in old_local_reprs or old_local_reprs[
name] != value_repr:
variables.append((name, value_repr))
return variables
def test_truncate_list():
max_length = 5
for i in range(max_length * 2):
lst = i * ['a']
truncated = truncate_list(lst, max_length)
if len(lst) <= max_length:
assert lst == truncated
else:
assert truncated == ['a', 'a', '...', 'a', 'a']
assert len(truncated) == max_length