If the expression is false, Python raises an AssertionError exception. When an exception occurs, it may have an associated value, also known as the exception's argument. try: printable = str(some_object) except TypeError: print("unprintable object") else: print(printable) Now, the print() line is only called if no exception was raised. This means that even careful code inspection doesn't reveal potential bugs." (Note that this is also the argument behind Java's checked exceptions -- now it is explicit that an exception can http://caribtechsxm.com/python-exception/python-error-code-exception.php
My question is, what is the best practice in areas like this, and not just for lists?Return whatever the heck I want and make sure I document it for a user Here's the script to calculate the timings: SETUP = 'counter = 0' LOOP_IF = """ counter += 1 """ LOOP_EXCEPT = """ try: counter += 1 except: pass """ if __name__ If you run them 1,000,000 times in a tight loop with a 90% chance of throwing an exception, then exceptions are a bit slower, yes. If the error indicator is already set, it is cleared first.
int PyErr_Warn(PyObject*category, char*message)¶ Issue a warning message. Are there any historically significant examples? Objects which, like files, provide predefined clean-up actions will indicate this in their documentation.
It is useful for code that must be executed if the try clause does not raise an exception. What is the difference between TeX and Texinfo? comments powered by Disqus Copyright © 2014 - Jeff Knupp- Powered by Blug