XD-DENG commented on a change in pull request #4833: [AIRFLOW-4006] Make better
use of Set in AirflowSecurityManager
URL: https://github.com/apache/airflow/pull/4833#discussion_r262117922
##########
File path: airflow/www/security.py
##########
@@ -233,8 +233,8 @@ def get_all_permissions_views(self):
"""
perms_views = set()
for role in self.get_user_roles():
- for perm_view in role.permissions:
- perms_views.add((perm_view.permission.name,
perm_view.view_menu.name))
+ perms_views = perms_views | {(perm_view.permission.name,
perm_view.view_menu.name)
+ for perm_view in role.permissions}
Review comment:
```python
def fun1(data):
a=set()
for d in data:
a.add(d)
return a
def fun2(data):
a=set()
a = a | {d for d in data}
return a
if __name__ == '__main__':
import timeit
print(fun1(list(range(100)) + list(range(100))) == fun2(list(range(100))
+ list(range(100))))
print(timeit.timeit("fun1(list(range(300)) + list(range(300)))",
setup="from __main__ import fun1"))
print(timeit.timeit("fun2(list(range(300)) + list(range(300)))",
setup="from __main__ import fun2"))
```
Result:
True
52.7378087699999
27.333367159999398
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