Learn about built-in error types in Python such as IndexError, NameError, KeyError, ImportError, etc.

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

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. The string printed as the exception type is the name of the built-in exception that occurred.

AS shown in the examples above, there are different types of built-in exceptions: ZeroDivisionError, TypeError, and NameError. You can find a complete list of built-in exceptions in the Python documentation. Of course, you can define your own exception types, but we will not deal with this ...

When an error occurs, or exception as we call it, Python will normally stop and generate an error message. These exceptions can be handled using the try statement: The try block will generate an exception, because x is not defined: try: print(x) except: print("An exception occurred") Try it Yourself » · Since the try block raises an error, the except block will be executed. Without the try block, the program will crash and raise an error:

Python Examples Python Compiler Python Exercises Python Quiz Python Challenges Python Practice Problems Python Server Python Syllabus Python Study Plan Python Interview Q&A Python Training ... The TypeError exception occurs if an operation tries to perform an action with an unexpected data type.

When an error occurs, or exception as we call it, Python will normally stop and generate an error message. These exceptions can be handled using the try statement: The try block will generate an exception, because x is not defined: try: print(x) except: print("An exception occurred") Try it Yourself » · Since the try block raises an error, the except block will be executed. Without the try block, the program will crash and raise an error:

November 20, 2025 - Exceptions are a general set of errors that, unlike syntax errors, appear during code execution. NameErrors and ScopeErrors are both caused by Python not being able to use a variable correctly. NameErrors occur when a variable or function is used before it has been correctly defined.

April 27, 2026 - Syntax errors are the errors caused by invalid code structure, typos, incorrect indentation, etc. For example, an if block is defined in Python using the if keyword, a boolean condition, and the : character. If we skip : while writing an if block in Python, the code runs into SyntaxError with the error message SyntaxError: expected ':', as shown in the following example:

April 26, 2025 - In Python, an EOFError is raised when one of the built-in functions, such as input() or raw_input() reaches the end-of-file (EOF) condition without reading any data. This commonly occurs in online IDEs or when reading from a file where there is no more data left to read. Example:Pythonn = int(input( ... In Python, exceptions are errors that occur at runtime and can crash your program if not handled.

Passing arguments of the wrong type (e.g. passing a list when an int is expected) should result in a TypeError, but passing arguments with the wrong value (e.g. a number outside expected boundaries) should result in a ValueError.

February 1, 2022 - >>> Enter a number: 9 Enter a number: 2 9.0 divided by 2.0 equals: 4.5 >>> Enter a number: 11 Enter a number: 3 11.0 divided by 3.0 equals: 3.6666666666666665 >>> Enter a number: 5 Enter a number: 0 Traceback (most recent call last): File "C:/Python34/Scripts/error1.py", line 3, in <module> z = x/y ZeroDivisionError: float division by zero >>>

July 21, 2022 - The Indentation error is another type of error in python that can be summed up inside the syntax error. As we know, we use indentation to define a block of code in python. So, in case of improper indentation, the Python interpreter raises an ...

February 23, 2025 - Some common error types in Python are, syntax errors, logic errors, assertion errors, index error, key error, name error, type error. Error types are like clues that guide you on how to fix the problem.

Python Examples Python Compiler Python Exercises Python Quiz Python Challenges Python Practice Problems Python Server Python Syllabus Python Study Plan Python Interview Q&A Python Training ... The ValueError exception occurs if a function receives a value of wrong type.

Because the plus operator (+) expected ... Python throws a TypeError, telling us that one of our parameters was of the incorrect type. Let's take a look at another example: >>> myVar = 30 >>> myVar[1] Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: 'int' object is not subscriptable · Because we can't access int type objects by index, as we can with list, tuple, ...

We can handle these built-in and ... and finally statements. Errors represent conditions such as compilation error, syntax error, error in the logical part of the code, library incompatibility, infinite recursion, etc....

January 3, 2025 - Use an Integrated Development Environment (IDE) with syntax highlighting to spot mistakes early. ... For additional insights on logging best practices in Python, explore our article on Python Logging Best Practices. Runtime errors occur while your program is running. These errors are typically caused by invalid operations or other unexpected conditions that arise as the program executes. They can crash your program if not handled properly. ... In this example, dividing by zero will raise a ZeroDivisionError during runtime, leading to a program crash.

Dividing any number by zero is mathematically undefined and results in a runtime error. ... OverflowError occurs when a numerical operation results in a number too large to be represented within Python’s numeric limits (mostly for floating-point numbers). Example with the math module’s exponential function: