I have an object
class Lists:
pass
for item in items_list:
name = str(item.theme)
if hasattr(Lists, name):
setattr(Lists, name, [])
append(value) to this array
else:
setattr(Lists, name, [])
If this object has this attribute I only to append the value to this list. Otherwise I want to add this attribute to the object and then append the value to this list.
You could use setattr + getattr. Here's a small example.
class A:
pass
attr = ['foo', 'bar', 'baz', 'foo', 'foo', 'baz']
vals = range(len(attr))
for i, j in zip(attr, vals):
if not hasattr(A, i):
setattr(A, i, []) # the attribute is created if it didn't already exist
getattr(A, i).append(j)
vars(A)
mappingproxy({..., 'bar': [1], 'baz': [2, 5], 'foo': [0, 3, 4]})
To add an attribute to the object use:
Lists.name = lambda: None
Your code will now look like :
class Lists:
pass
for item in items_list:
name = str(item.theme)
if hasattr(Lists, name):
setattr(Lists, name, [])
append(value) to this array
else:
Lists.name = lambda: None
setattr(Lists, name, [])
items_listcontents and elaborate the expected contents ofthis arraygetattr(Lists, name).append(value)?