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I am currently reading tutorials in tutorialspoint's python tutorials. But it's the tutorial of Python 2 not Python 3.3 which I have right now. Well, I managed to search in the internet and found out about some changes. But this one is pretty tough.
So, in tutorialspoint the python source code for raising an exception is:
def functionName( level ):
if level < 1:
raise "Invalid level!", level
# The code below to this would not be executed
# if we raise the exception
But if I type
raise "Invalid level!", level
it says syntax error. So, I want to know how I raise an exception in Python 3.3.
669
As a Python developer you can choose to throw an exception if a condition occurs. To throw (or raise) an exception, use the raise keyword.
Python raise Keyword is used to raise exceptions or errors. The raise keyword raises an error and stops the control flow of the program. It is used to bring up the current exception in an exception handler so that it can be handled further up the call stack.
Throwing exceptions manually There are two types of exceptions user defined and predefined each exception is represented by a class and which inherits the Throwable class. To throw an exception explicitly you need to instantiate the class of it and throw its object using the throw keyword.
The syntax is:
raise Exception("Invalid level! " + level)
I would really recommend you to read the Python docs.
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