This may occur in an class="pre">import statement, in an exec statement, in a call to the built-in function eval() or input(), or when reading the initial script str() of the exception instance returns only the message. Often times, developers elect to make use of the try-finally blocks to ensure that such resources are handled properly. python api exception error-handling errno share|improve this question edited Sep 5 '12 at 14:46 Simeon Visser 52.6k877105 asked Sep 5 '12 at 14:08 Anton Daneyko 1,53031634 add a comment| 1 Answer this content
In a try statement with an except clause that mentions a particular class, that clause also handles any exception classes derived from that class (but not exception classes from Created using Sphinx 1.2. The error is caused by (or at least detected at) the token preceding the arrow: in the example, the error is detected at the keyword print, since a colon (
more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed The first is that everyone can in the end, get what he wants, if he only tries. EnvironmentError¶ Base class for errors that come from outside of Python (the operating system, filesystem, etc.). Under Windows, if the winerror constructor argument is an integer, the errno attribute is determined from the Windows error code, and the errno argument is ignored.
My problem is now, that the code with except "FileNotFoundError": won't run on Windows's Python 3.2, but if I change it to except "IOError": it won't work on my Mac anymore. exception ZeroDivisionError¶ Raised when the second argument of a division or modulo operation is zero. This is a subclass of SyntaxError. Python Exception Message start¶ The first index of invalid data in object.
New in version 2.0. Two exception classes that are not related via subclassing are never equivalent, even if they have the same name. The new behavior simply creates the value attribute. exception UnicodeDecodeError¶ Raised when a Unicode-related error occurs during decoding.
Note that because of the underlying memory management architecture (C's malloc() function), the interpreter may not always be able to completely recover from this situation; it nevertheless raises an exception so Python Exception Class Methods The associated value is a string indicating the type of the operands and the operation. For instance, if we were to redesign the find_value function that was defined in the previous example, but instead raised each exception separately then the first matching exception would be raised. Corresponds to errno ECONNREFUSED.
For exceptions that involve a file system path (such as chdir() or unlink()), the exception instance will contain a third attribute, filename, which is the file name passed exception ResourceWarning¶ Base class for warnings related to resource usage. Type Error Python Setting __cause__ also implicitly sets the __suppress_context__ attribute to True, so that using raise new_exc from None effectively replaces the old exception with the Python Filenotfounderror exception BlockingIOError¶ Raised when an operation would block on an object (e.g.
else: ... news exception RecursionError¶ This exception is derived from RuntimeError. Built-in Types Next topic 6. Please try again ... Python Custom Exception
Setting __cause__ also implicitly sets the __suppress_context__ attribute to True, so that using raise new_exc from None effectively replaces the old exception with the new one for display purposes (e.g. Found a bug? exception SystemExit¶ This exception is raised by the sys.exit() function. have a peek at these guys object¶ The object the codec was attempting to encode or decode.
The default traceback display code shows these chained exceptions in addition to the traceback for the exception itself. Python Errno If the expression evaluates to True then the assertion is ignored completely. Page Contents exceptions - Built-in error classes Description Base Classes BaseException Exception StandardError ArithmeticError LookupError EnvironmentError Raised Exceptions AssertionError AttributeError EOFError FloatingPointError GeneratorExit IOError ImportError IndexError KeyError KeyboardInterrupt MemoryError NameError NotImplementedError
UnicodeWarning Warn about problems with unicode text. Last updated on Oct 12, 2014. args¶ The tuple of arguments given to the exception constructor. Python Attributeerror Object Has No Attribute Listing 7-11.
assert should be used for trapping user-defined constraints! Table Of Contents Chapter 7: Exception Handling and Debugging Exception Handling Syntax and Differences with Java Catching Exceptions Raising Exceptions Defining Your Own Exceptions Issuing Warnings Assertions and Debugging Context Managers Long integers allocate more space as values grow, so they end up raising MemoryError. http://caribtechsxm.com/python-exception/python-try-except-error-types.php SyntaxErrorRaised when there is an error in Python syntax.