@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. Answer from Jennifer Nordell on teamtreehouse.com
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.
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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).
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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.
Value error, name error, type error?
if you try to execute the statement int('a'), Python will throw a ValueError ('a' is not appropriate for converting into an integer). TypeError refers to a mismatch in types. (Types are the "kinds" of values, e.g. More on teamtreehouse.com
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September 22, 2018ValueError vs TypeError
Eva Feng is having issues with: I find it a bit confusing to distinguish between ValueError and TypeError. For example, when you have float( a string ) - it shows up as ValueEr... More on ecs.teamtreehouse.com
1
February 26, 2026python - ValueError Versus TypeError, Why? - Stack Overflow
The Error output: "ValueError: invalid literal for int() with base 10: 'yes'" I know it is obvious that I AM WRONG, but I do not understand why. When I try to convert a string to an int, I More on stackoverflow.com
What's the difference between a TypeError and ValueError?
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. More on reddit.com
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September 21, 2022How do I handle errors in Python?
You should use the try-except blocks and write clear error messages.
middleware.io
middleware.io › blog › python-error-types
Python Error Types: Common Errors and How to Handle Them
What are common Python errors?
The most common Python errors consist of SyntaxError, NameError, TypeError, ValueError, IndexError, KeyError, and AttributeError.
middleware.io
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Python Error Types: Common Errors and How to Handle Them
How can I monitor Python errors in real time?
You can use tools like Middleware to track, analyze, and fix Python errors across your application instantly.
middleware.io
middleware.io › blog › python-error-types
Python Error Types: Common Errors and How to Handle Them
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Top answer 1 of 5
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A Value error is
Raised when a built-in operation or function receives an argument that has the right type but an inappropriate value
the float function can take a string, ie float('5'), it's just that the value 'string' in float('string') is an inappropriate (non-convertible) string
On the other hand,
Passing arguments of the wrong type (e.g. passing a list when an int is expected) should result in a TypeError
so you would get a TypeError if you tried float(['5']) because a list can never be converted into a float.
Cite
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ValueError a function is called on a value of the correct type, but with an inappropriate value
TypeError : a function is called on a value of an inappropriate type
Quora
quora.com › What-is-the-difference-between-TypeError-and-ValueError-in-Python-When-does-Python-throw-these-exceptions
What is the difference between 'TypeError' and 'ValueError' in Python? When does Python throw these exceptions? - Quora
Answer: 🔴1. TypeError happens when an operation is performed on an inappropriate type. For example: Copy [code]result = 'string' + 5 # Can't add string and integer [/code]🔴2. ValueError occurs when a function gets an argument of the right type but inappropriate value. For instance: Copy [co...
Sololearn
sololearn.com › en › Discuss › 2497149 › what-is-the-difference-between-typeerror-and-valueerror
What is the difference between 'TypeError' and 'ValueError'? | Sololearn: Learn to code for FREE!
A Value error is Raised when a built-in operation or function receives an argument that has the right type but an inappropriate value the float function can take a string, ie float('5'), it's just that the value 'string' in float('string') is ...
Middleware
middleware.io › blog › python-error-types
Python Error Types: Common Errors and How to Handle Them
A TypeError happens when you use the wrong type (like adding a string to a number), while a ValueError happens when the type is right but the value is incorrect (like converting “abc” to an integer).
YouTube
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ValueErrors & TypeErrors in Python | How to tell them apart! - YouTube
Here's how to tell the difference between TypeErrors and ValueErrors in Python.My Full OOP Course:https://www.udemy.com/course/object-oriented-programming-in...
Published: March 28, 2025
Scaler
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Python ValueError - Scaler Topics
December 15, 2022 - In Python, a ValueError occurs ... is most common in mathematical operations. A TypeError, as opposed to a ValueError, is raised when an operation is performed that is using an incorrect or unsupported object type....
Sivo
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What is the difference between TypeError and ValueError in Python? | Python Exceptions – Sivo
August 30, 2025 - Published in Python Exceptions ... in what aspect of the data causes the exception: TypeError concerns the type of an object, while ValueError addresses the content or value of an object, assuming its type is correct....
X
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Reuven M. Lerner on X: "I've always intuitively known the difference between TypeError and ValueError in #Python, but couldn't articulate it. Turns out the docs say it clearly: - TypeError means you passed an inappropriate type. - ValueError means you passed the right type, but an inappropriate value." / X
April 17, 2022 - I've always intuitively known the difference between TypeError and ValueError in #Python, but couldn't articulate it. Turns out the docs say it clearly: - TypeError means you passed an inappropriate type. - ValueError means you passed the right ...
Python Forum
python-forum.io › thread-28486.html
Type Error or Value Error?
print(int('100.0'))it is type error, how is it value error?
Real Python
realpython.com › ref › builtin-exceptions › valueerror
ValueError | Python’s Built-in Exceptions – Real Python
That distinction—right type, wrong value—is exactly what separates a ValueError from a TypeError.
Carleton University
cs.carleton.edu › cs_comps › 1213 › pylearn › final_results › encyclopedia › valueError.html
Error Encyclopedia | Value Error
In Python, a value is the information that is stored within a certain object. To encounter a ValueError in Python means that is a problem with the content of the object you tried to assign the value to.
Python
docs.python.org › 3 › builtins › exceptions.html
Built-in Exceptions — Python 3.14.7 documentation
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.
Treehouse
ecs.teamtreehouse.com › community › valueerror-vs-typeerror
ValueError vs TypeError (Example) | Treehouse Community
February 26, 2026 - Eva Feng is having issues with: I find it a bit confusing to distinguish between ValueError and TypeError. For example, when you have float( a string ) - it shows up as ValueEr...
Sololearn
sololearn.com › en › Discuss › 55563 › typeerror-and-valueerror-seem-so-similar-to-me-almost-as-if-they-were-the-same-can-someone-please-give-me-an-example-of-both-so-i-can-know-the-difference
TypeError and ValueError seem so similar to me (almost as if they were the same). Can someone please give me an example of both so I can know the difference? | Sololearn: Learn to code for FREE!
September 13, 2016 - pythonexceptionstypeerrorvalueerror · 13th Sep 2016, 2:11 PM · DELETED · 2 Answers · Answer · + 3 · TypeError is raised when you want to do something that's not supported by design.
Sololearn
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Sololearn: Learn to Code
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. https://docs.python.org/3.10/library/exceptions.html#TypeError https://docs.python.org/3.10/library/exceptions.html#ValueError
Airbrake
blog.airbrake.io › blog › python › python-exception-handling-valueerror
Python Exception Handling - ValueError
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