class Query(object):
def __init__(self,name):
self.name=name
def __enter__(self):
print('Begin')
return self
def __exit__(self,exc_type,exc_value,traceback):
if exc_type:
print('Error')
else:
print('End')
def query(self):
print('Query info about %s...'% self.name)
# your code goes here
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