Home > Python Exception > Python Argument Error

Python Argument Error


If the associated value is a plain integer, it specifies the system exit status (passed to C's exit() function); if it is None, the exit status is zero; if exception DeprecationWarning¶ Base class for warnings about deprecated features. exception AttributeError¶ Raised when an attribute reference (see Attribute references) or assignment fails. (When an object does not support attribute references or attribute assignments at all, TypeError is raised.) exception The particular rule is that every individual is, more or less, an exception to the rule." Samuel Butler Delicate Handling "The finest qualities of our nature, like the bloom on fruits, http://vealcine.com/python-exception/python-exception-argument-error.php

share|improve this answer answered Feb 25 '11 at 2:55 phooji 6,9602338 add a comment| up vote 1 down vote ValueError seems to cover your situation quite well. exception ImportWarning¶ Base class for warnings about probable mistakes in module imports. If you are trapping multiple exceptions, you can have a variable follow the tuple of the exception. Changed in version 2.5: Changed to inherit from BaseException. https://docs.python.org/2/library/exceptions.html

Python Exception Message

The associated value is the second argument to the raise statement. exception Warning¶ Base class for warning categories. Exception Handling in Python Exceptions handling in Python is very similar to Java.

Assertions in Python An assertion is a sanity-check that you can turn on or turn off when you are done with your testing of the program. The except Clause with Multiple Exceptions You can also use the same except statement to handle multiple exceptions as follows − try: You do your operations here; ...................... exception BufferError¶ Raised when a buffer related operation cannot be performed. Python Exception Class Methods AttributeError Raised in case of failure of attribute reference or assignment.

share|improve this answer edited Nov 15 '12 at 17:14 answered Nov 1 '08 at 23:17 Markus Jarderot 50.7k894106 10 Stop writing classes and custom exceptions - pyvideo.org/video/880/stop-writing-classes –Hamish Grubijan Nov Python Custom Exception args¶ The tuple of arguments given to the exception constructor. Many standard modules define their own exceptions to report errors that may occur in functions they define. my company exception KeyboardInterrupt¶ Raised when the user hits the interrupt key (normally Control-C or Delete).

It is a subclass of UnicodeError. Python Errno Example An exception can be a string, a class or an object. The code within the try clause will be executed statement by statement. It directly inherits from BaseException instead of StandardError since it is technically not an error.

Python Custom Exception

We show this in the following interactive session: >>> n = int(raw_input("Please enter a number: ")) Please enter a number: 23.5 Traceback (most recent call last): File "", line 1, in http://stackoverflow.com/questions/8293325/is-it-bad-form-to-raise-argumenterror-by-hand ValueError Raised when the built-in function for a data type has the valid type of arguments, but the arguments have invalid values specified. Python Exception Message exception StopIteration¶ Raised by built-in function next() and an iterator‘s __next__() method to signal that there are no further items produced by the iterator. Python Raise Valueerror In this last case, args contains the verbatim constructor arguments as a tuple.

The associated value is a string indicating what went wrong (in low-level terms). http://vealcine.com/python-exception/python-argument-error-exception.php However, for historical reasons, OverflowError is sometimes raised for integers that are outside a required range. exception FileNotFoundError¶ Raised when a file or directory is requested but doesn't exist. print('y =', y) ... ('spam', 'eggs') ('spam', 'eggs') x = spam y = eggs If an exception has arguments, they are printed as the last part (‘detail') of the Python Filenotfounderror

  • exception BytesWarning¶ Base class for warnings related to bytes and bytearray.
  • exception SystemError¶ Raised when the interpreter finds an internal error, but the situation does not look so serious to cause it to abandon all hope.
  • I've come across a few situations where you have a function like so: def import_to_orm(name, save=False, recurse=False): """ :param name: Name of some external entity to import. :param save: Save the
  • python exception arguments share|improve this question edited Nov 2 '11 at 19:26 sth 128k33204309 asked Nov 1 '08 at 23:02 cdleary 27.4k40130178 add a comment| 4 Answers 4 active oldest votes
  • The preceding part of the error message shows the context where the exception happened, in the form of a stack traceback.
  • It is about don't over-complicate things. –RayLuo Aug 31 at 4:06 @RayLuo you may have sanity-checked what the video's saying and converted it into a palateable, sensible alternative message,
  • For example: for arg in sys.argv[1:]: try: f = open(arg, 'r') except IOError: print('cannot open', arg) else: print(arg, 'has', len(f.readlines()), 'lines') f.close() The use of the else clause is better

Word for making your life circumstances seem much worse than they are Should two DFAs be complete before making an intersection of them? The inverse: 0.0294117647059 [email protected]:~/tmp$ python finally.py Your number: Python There may or may not have been an exception. This behaviour only occurs when constructing OSError directly or via an alias, and is not inherited when subclassing. this contact form During execution, a check for interrupts is made regularly.

print('Handling run-time error:', err) ... Python Attributeerror Object Has No Attribute Corresponds to errno EINTR. This may occur in an class="pre">import statement, in a call to the built-in functions exec() or eval(), or when reading the initial script or standard input (also interactively).

exception IndentationError¶ Base class for syntax errors related to incorrect indentation.

encoding¶ The name of the encoding that raised the error. For example, I want a floating point value that is between 0 and 1. if positionals: self.active_actions.append(positionals[0]) # Added by argcomplete #self.error(_('too few arguments')) # make sure all required actions were present for action in self._actions: if action.required: if action not in seen_actions: name = Python Exception Stack Trace except(Exception1[, Exception2[,...ExceptionN]]]): If there is any exception from the given exception list, then execute this block. ......................

Traceback (most recent call last): File "", line 2, in NameError: HiThere 8.5. Study its use in the code. –hpaulj Mar 12 '15 at 17:08 add a comment| 2 Answers 2 active oldest votes up vote 28 down vote accepted From the source documentation: Breaking effort on both Weak and Strong collision resistance hash values Suggestion error with Coveo search box What is summer in Spanish? "Estío" vs "verano" Traveling Pumpkin Problem What kind of navigate here inheriting from it or raising it yourself seems incorrect.

What is summer in Spanish? "Estío" vs "verano" Help me remember which is which: "humoro" and "humuro" Why do jet engines smoke? The associated value is a string indicating what precisely went wrong. A simple example to demonstrate the finally clause: try: x = float(raw_input("Your number: ")) inverse = 1.0 / x finally: print("There may or may not have been an exception.") print "The Changed in version 2.6: Changed socket.error to use this as a base class.

This can be used to test an exception handler or to report an error condition "just like" the situation in which the interpreter raises the same exception; but beware that there exception TabError¶ Raised when indentation contains an inconsistent use of tabs and spaces. Can I use my client's GPL software? Because of the lack of standardization of floating point exception handling in C, most floating point operations are not checked.

Exceptions come in different types, and the type is printed as part of the message: the types in the example are ZeroDivisionError, NameError and TypeError. exception ReferenceError¶ This exception is raised when a weak reference proxy, created by the weakref.proxy() function, is used to access an attribute of the referent after it has been garbage if we don't have the permission to read it, we get the following message: I/O error(13): Permission denied An except clause may name more than one exception in a tuple of Join them; it only takes a minute: Sign up Is it bad form to raise ArgumentError by hand?

After the try: block, include an except: statement, followed by a block of code which handles the problem as elegantly as possible. Look at the following example, which asks the user for input until a valid integer has been entered, but allows the user to interrupt the program (using Control-C or whatever Please enter an integer: 42.0 No valid integer!