Category: Errors And Exceptions

Errors And Exceptions

Assertions

Assertions

Assertions are diagnostic predicates which must evaluate to Boolean true; otherwise, an exception is raised to indicate that the expression is false. These work similarly to the assert macros which are part of the...

try-finally Statement

try-finally Statement

The try-finally statement differs from its try-except brethren in that it is not used to handle exceptions. Instead it is used to maintain consistent behavior regardless of whether or not exceptions occur. The finally...

else Clause in Exceptions

else Clause in Exceptions

We have seen the else statement with other Python constructs such as conditionals and loops. With respect to try-except statements, its functionality is not that much different from anything else you have seen: The...

Exceptional Arguments

Exceptional Arguments

exception may have arguments are passed along to the exception handler when they are raised. When an exception is raised, parameters are generally provided as an additional aid for the exception handler. Although arguments...

try Statement with Multiple excepts

try Statement with Multiple excepts

The except statement in such formats specifically detects exceptions named Exception. You can chain multiple except statements together to handle different types of exceptions with the same try: Example This same try clause is...

try-except Statement in Python

try-except Statement in Python

The try-except statement (and more complicated versions of this statement) allows you to define a section of code to monitor for exceptions and also provides the mechanism to execute handlers for exceptions. The syntax...

Exceptions in Python

Exceptions in Python

Whenever exception occurs A “traceback” notice appears along with a notice with as much diagnostic information as the interpreter can give you, including the error name, reason, and perhaps even the line number near...

What Are Exceptions?

What Are Exceptions?

Errors Before we get into details about what exceptions are, let us review what errors are. In the context of software, errors are either syntactical or logical in nature. Syntax errors indicate errors with...