I have a piece of code in Python that seems to cause an error probabilistically because it is accessing a server and sometimes that server has a 500 internal server error. I want to keep trying until I do not get the error. My solution was:
while True: try: #code with possible error except: continue else: #the rest of the code break
This seems like a hack to me. Is there a more Pythonic way to do this?
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Answer
It won’t get much cleaner. This is not a very clean thing to do. At best (which would be more readable anyway, since the condition for the break
is up there with the while
), you could create a variable result = None
and loop while it is None
. You should also adjust the variables and you can replace continue
with the semantically perhaps correct pass
(you don’t care if an error occurs, you just want to ignore it) and drop the break
– this also gets the rest of the code, which only executes once, out of the loop. Also note that bare except:
clauses are evil for reasons given in the documentation.
Example incorporating all of the above:
result = None while result is None: try: # connect result = get_data(...) except: pass # other code that uses result but is not involved in getting it