37 lines
686 B
Python
37 lines
686 B
Python
|
class Context:
|
||
|
|
def __enter__(self):
|
||
|
|
print("Entering")
|
||
|
|
def __exit__(self, *args):
|
||
|
|
print("Exiting with",[type(x) for x in args])
|
||
|
|
|
||
|
|
def simple():
|
||
|
|
print("Before")
|
||
|
|
with Context() as c:
|
||
|
|
print("In context")
|
||
|
|
print("After")
|
||
|
|
|
||
|
|
simple()
|
||
|
|
|
||
|
|
def withReturn():
|
||
|
|
print("Before")
|
||
|
|
with Context() as c:
|
||
|
|
print("in context")
|
||
|
|
return 42
|
||
|
|
print("after return")
|
||
|
|
print("After")
|
||
|
|
|
||
|
|
print(withReturn())
|
||
|
|
|
||
|
|
def withException():
|
||
|
|
print("Before")
|
||
|
|
with Context() as c:
|
||
|
|
print("Raising")
|
||
|
|
raise ValueError()
|
||
|
|
print("Don't print me")
|
||
|
|
print("After")
|
||
|
|
|
||
|
|
try:
|
||
|
|
withException()
|
||
|
|
except Exception as e:
|
||
|
|
print(repr(e))
|