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There should be one—--and preferably only one –--obvious way to do it.
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def build(user, build_name):
if not is_user_valid(user):
redirect("/auth/login/")
return False
#do something here
return create_building(build_name) 
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if not is_user_valid(user):
redirect("/auth/login/")
log_warning(" %s is trying to enter without permission!" %(user["name"]))
return False  
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