Menu
×
   ❮     
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NUMPY PANDAS NODEJS R TYPESCRIPT ANGULAR GIT POSTGRESQL MONGODB ASP AI GO KOTLIN SASS VUE DSA GEN AI SCIPY AWS CYBERSECURITY DATA SCIENCE
     ❯   

Python Tutorial

Python HOME Python Intro Python Get Started Python Syntax Python Comments Python Variables Python Data Types Python Numbers Python Casting Python Strings Python Booleans Python Operators Python Lists Python Tuples Python Sets Python Dictionaries Python If...Else Python While Loops Python For Loops Python Functions Python Lambda Python Arrays Python Classes/Objects Python Inheritance Python Iterators Python Polymorphism Python Scope Python Modules Python Dates Python Math Python JSON Python RegEx Python PIP Python Try...Except Python User Input Python String Formatting

File Handling

Python File Handling Python Read Files Python Write/Create Files Python Delete Files

Python Modules

NumPy Tutorial Pandas Tutorial SciPy Tutorial Django Tutorial

Python Matplotlib

Matplotlib Intro Matplotlib Get Started Matplotlib Pyplot Matplotlib Plotting Matplotlib Markers Matplotlib Line Matplotlib Labels Matplotlib Grid Matplotlib Subplot Matplotlib Scatter Matplotlib Bars Matplotlib Histograms Matplotlib Pie Charts

Machine Learning

Getting Started Mean Median Mode Standard Deviation Percentile Data Distribution Normal Data Distribution Scatter Plot Linear Regression Polynomial Regression Multiple Regression Scale Train/Test Decision Tree Confusion Matrix Hierarchical Clustering Logistic Regression Grid Search Categorical Data K-means Bootstrap Aggregation Cross Validation AUC - ROC Curve K-nearest neighbors

Python MySQL

MySQL Get Started MySQL Create Database MySQL Create Table MySQL Insert MySQL Select MySQL Where MySQL Order By MySQL Delete MySQL Drop Table MySQL Update MySQL Limit MySQL Join

Python MongoDB

MongoDB Get Started MongoDB Create DB MongoDB Collection MongoDB Insert MongoDB Find MongoDB Query MongoDB Sort MongoDB Delete MongoDB Drop Collection MongoDB Update MongoDB Limit

Python Reference

Python Overview Python Built-in Functions Python String Methods Python List Methods Python Dictionary Methods Python Tuple Methods Python Set Methods Python File Methods Python Keywords Python Exceptions Python Glossary

Module Reference

Random Module Requests Module Statistics Module Math Module cMath Module

Python How To

Remove List Duplicates Reverse a String Add Two Numbers

Python Examples

Python Examples Python Compiler Python Exercises Python Quiz Python Server Python Interview Q&A Python Bootcamp Python Certificate

Python Built-in Exceptions


Built-in Exceptions

The table below shows built-in exceptions that are usually raised in Python:

Exception Description
ArithmeticError Raised when an error occurs in numeric calculations
AssertionError Raised when an assert statement fails
AttributeError Raised when attribute reference or assignment fails
Exception Base class for all exceptions
EOFError Raised when the input() method hits an "end of file" condition (EOF)
FloatingPointError Raised when a floating point calculation fails
GeneratorExit Raised when a generator is closed (with the close() method)
ImportError Raised when an imported module does not exist
IndentationError Raised when indentation is not correct
IndexError Raised when an index of a sequence does not exist
KeyError Raised when a key does not exist in a dictionary
KeyboardInterrupt Raised when the user presses Ctrl+c, Ctrl+z or Delete
LookupError Raised when errors raised cant be found
MemoryError Raised when a program runs out of memory
NameError Raised when a variable does not exist
NotImplementedError Raised when an abstract method requires an inherited class to override the method
OSError Raised when a system related operation causes an error
OverflowError Raised when the result of a numeric calculation is too large
ReferenceError Raised when a weak reference object does not exist
RuntimeError Raised when an error occurs that do not belong to any specific exceptions
StopIteration Raised when the next() method of an iterator has no further values
SyntaxError Raised when a syntax error occurs
TabError Raised when indentation consists of tabs or spaces
SystemError Raised when a system error occurs
SystemExit Raised when the sys.exit() function is called
TypeError Raised when two different types are combined
UnboundLocalError Raised when a local variable is referenced before assignment
UnicodeError Raised when a unicode problem occurs
UnicodeEncodeError Raised when a unicode encoding problem occurs
UnicodeDecodeError Raised when a unicode decoding problem occurs
UnicodeTranslateError Raised when a unicode translation problem occurs
ValueError Raised when there is a wrong value in a specified data type
ZeroDivisionError Raised when the second operator in a division is zero

×

Contact Sales

If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail:
sales@w3schools.com

Report Error

If you want to report an error, or if you want to make a suggestion, send us an e-mail:
help@w3schools.com

W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use, cookie and privacy policy.

Copyright 1999-2024 by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3.CSS.