Just to make things clear. input("x: ") always returns a string. It can be "123" or "bananas". In the first case, it can be converted to an integer. In the second case, it cannot, and a ValueError is raised. But in either case the type is fine for the int function. So this is a value error, not a type error. Answer from ploud1 on reddit.com
Python
docs.python.org › 3 › library › exceptions.html
Built-in Exceptions — Python 3.14.3 documentation
The BaseExceptionGroup constructor returns an ExceptionGroup rather than a BaseExceptionGroup if all contained exceptions are Exception instances, so it can be used to make the selection automatic. The ExceptionGroup constructor, on the other hand, raises a TypeError if any contained exception ...
GeeksforGeeks
geeksforgeeks.org › python › handling-typeerror-exception-in-python
Handling TypeError Exception in Python - GeeksforGeeks
August 22, 2025 - Trying to use a variable like a string or number as if it were a function will raise a TypeError. ... To fix this error, just print the variable without parentheses. ... Python list indices must be integers or slices.
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W3Schools
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Python TypeError Exception
Python Examples Python Compiler ... Certificate Python Training ... The TypeError exception occurs if an operation tries to perform an action with an unexpected data type....
Reddit
reddit.com › r/learnpython › what's the difference between a typeerror and valueerror?
r/learnpython on Reddit: What's the difference between a TypeError and ValueError?
September 21, 2022 -
In this example:
x = int(input("x: "))
print(f'x = {x}')if the input is a string, a ValueError is raised. Why not a TypeError? An invalid data type is inputted after all.
Top answer 1 of 5
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Just to make things clear. input("x: ") always returns a string. It can be "123" or "bananas". In the first case, it can be converted to an integer. In the second case, it cannot, and a ValueError is raised. But in either case the type is fine for the int function. So this is a value error, not a type error.
2 of 5
11
TypeError refers to a situation where something like a function is expecting to get one type as an argument, but it's given something else instead. For instance, it could be expecting a list, but given an integer. ValueError refers to a situation where the type of the aforementioned argument is okay, but the actual content doesn't match some agreed-upon rule. In this case, int is expecting a string or numeric type as an argument, which is fine as input always returns a string, but it expects that string to only have digits (which can be surrounded by whitespace). If you give it a string with other characters, it freaks out because it has no idea how to create an integer out of those (unless you set the number base to something like 16, in which case some are okay, but you'd end up with different results).
Pynerds
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TypeError Exception in Python
TypeError exceptions occur on an attempt to perform an operation on objects of an inappropriate/unsupported type. This typically occurs when attemptin
Real Python
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TypeError | Python’s Built-in Exceptions – Real Python
March 27, 2025 - TypeError is a built-in exception that occurs when an operation is applied to an object of inappropriate type.
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Python TypeError | How to Avoid TypeError with Examples
April 13, 2023 - TypeError is a kind of error that python generates. We are trying to perform the operation of the wrong type of object. For example, if we are trying to do the square root of a number but we are passing a list instead of int, then TypeError ...
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How to Fix TypeError Exceptions in Python | Rollbar
October 1, 2022 - The Python TypeError is an exception that occurs when the data type of an object in an operation is inappropriate. This can happen when an operation is performed on an object of an incorrect type, or it is not supported for the object.
Qodo
qodo.ai › blog › learn › common python error types and how to resolve them
Common Python error types and how to resolve them
March 20, 2025 - BaseException ├── Exception │ ├── ArithmeticError │ │ ├── FloatingPointError │ │ ├── OverflowError │ │ └── ZeroDivisionError │ ├── AttributeError │ ├── ImportError │ │ └── ModuleNotFoundError │ ├── LookupError │ │ ├── IndexError │ │ └── KeyError │ ├── NameError │ │ └── UnboundLocalError │ ├── OSError │ │ ├── FileNotFoundError │ │ ├── ConnectionError │ │ └── PermissionError │ ├── TypeError │ └── ValueError └── SystemExit · Knowing how to interpret and fix these issues efficiently can save hours of debugging time down the road and prevent production issues before they occur. Let’s explore the most common error types you’ll encounter in Python and learn how to handle them with finesse.
Python documentation
docs.python.org › 3 › tutorial › errors.html
8. Errors and Exceptions — Python 3.14.3 documentation
>>> def divide(x, y): ... try: ... result = x / y ... except ZeroDivisionError: ... print("division by zero!") ... else: ... print("result is", result) ... finally: ... print("executing finally clause") ... >>> divide(2, 1) result is 2.0 executing finally clause >>> divide(2, 0) division by zero! executing finally clause >>> divide("2", "1") executing finally clause Traceback (most recent call last): File "<stdin>", line 1, in <module> divide("2", "1") ~~~~~~^^^^^^^^^^ File "<stdin>", line 3, in divide result = x / y ~~^~~ TypeError: unsupported operand type(s) for /: 'str' and 'str'
Tudelft
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3.1. Error Types — MUDE textbook
November 20, 2025 - TypeErrors occur when an operation or function gets the wrong data type
Top answer 1 of 2
1
When you get a traceback error, look at the last line to see the top level cause for error.
my_file.write(line +'\n')
&
TypeError: unsupported operand type(s) for +: 'int' and 'str'
Clearly it hints to the expression line +'\n'
The +operator expects both arguments to be of same type.(It cant find any overloaded function definition that takes an int and a string.
This is because line is an integer (as generated by randint) while '\n' is a string.
So typecast line to a string
line -> str(line).
The new correct line should be
my_file.write(str(line) +'\n')
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0
As the error message explains it, TypeError: unsupported operand type(s) for +: 'int' and 'str'. You can't concatenate an "integer" (line, which is random.randint(1,500) with a "string" '\n'.
You can do the following:
Copymy_file.write(str(line) +'\n')
DataCamp
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Exception & Error Handling in Python | Tutorial by DataCamp | DataCamp
December 12, 2024 - Yes, Python allows you to catch multiple exceptions in a single try-except block by using a tuple of exception types. For example: except (TypeError, ValueError):. This will handle either a TypeError or a ValueError in the same block.
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TypeError in Python - PythonForBeginners.com
December 28, 2022 - TypeError is an exception in Python programming language that occurs when the data type of objects in an operation is inappropriate. For example, If you attempt to divide an integer with a string, the data types of the integer and the string object will not be compatible.
Pronod's Blog
data-intelligence.hashnode.dev › handling-typeerror-in-python-guide
Understanding and Fixing Python TypeErrors
September 13, 2024 - In Python, a TypeError is a built-in exception that occurs when an operation or function is applied to an object of inappropriate data type. This error arises when Python cannot handle the combination of types being used.
Cornell Computer Science
cs.cornell.edu › courses › cs1110 › 2024fa › lectures › lecture24 › handout-24.pdf pdf
11/17/24 1 Error Types in Python def foo(): assert 1 == 2, 'My error' …
Creating Errors in Python · def foo(x): assert x < 2, 'My error' … · def foo(x): if x >= 2: m = 'My error' err = AssertionError(m) raise err · • Create errors with raise · § Usage: raise <exp> § exp evaluates to an object · § An instance of Exception · • Tailor your error types · § ValueError: Bad value · § TypeError: Bad type ·
GeeksforGeeks
geeksforgeeks.org › python › built-exceptions-python
Python Built-in Exceptions - GeeksforGeeks
2 weeks ago - Python provides a set of built-in exceptions, each designed to signal a specific type of error and help you debug more effectively.
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What are the Different Types of Python Errors? – and How to Handle Them
July 14, 2025 - In Python, a TypeError occurs when you try to perform an operation on incompatible data types. This often happens when mixing strings and numbers, or passing the wrong type of argument to a function.
Carleton University
cs.carleton.edu › cs_comps › 1213 › pylearn › final_results › encyclopedia › typeError.html
Error Encyclopedia | Type Error
For example, the multiplication ... 1187228.3001583007 * 7 8310598.101108105 · A TypeError occurs in Python when you attempt to call a function or use an operator on something of the incorrect type....
Top answer 1 of 2
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@Liam Hayes (https://teamtreehouse.com/liamhayes) Hi! I have a note about @Steven Parker (https://teamtreehouse.com/stevenparker)'s example (especially the second one). When I was trying to wrap my head around this, I could not for the life of me understand why the built-in function for changing something to an int would give a ValueError with a string as opposed to a TypeError. Surely, it's expecting a number, right?
Well, no. It isn't. The int() function takes either a number or a string. It can convert the string "21" to the integer 21, but it can't convert "dog" to a number. Thus, it's getting the right type, but it's still not a value that it can convert. This is when we get the ValueError. It's of the right type, but the value is such that it still can't be done.
That being said, if we tried to send in something that was neither a string nor a number, it would have generated a TypeError as it is of the wrong type.
Hope this helps! :sparkles:
edited for additional note
In your own custom made functions, you can pass in whatever you want, although ideally, you know what you're passing in. This is not true of built-in functions in Python. When in doubt, check the documentation for the function in question.
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A TypeError occurs when an operation or function is applied to an object of inappropriate type.
A ValueError occurs when a built-in operation or function receives an argument that has the right type but an inappropriate value, and the situation is not described by a more precise exception such as IndexError.
Examples: 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.
For more details, see the Exceptions page (https://docs.python.org/3/library/exceptions.html) of the Python documentation.