Unhashable type list

Explore your training options in 10 minutes Get Started. Python dictionaries only accept hashable data types as a key in a dictionary. A list is not a hashable data type.

The error message "TypeError: unhashable type: 'list' " typically indicates an attempt to employ a list as a hashable argument. Hashing an unhashable object leads to an error. For example, using a list as a dictionary key is infeasible since lists aren't hashable. The conventional resolution involves converting the list to a tuple. Dictionary keys must be immutable types and list is a mutable type. You'll have to change your list into tuples if you want to put them as keys in your dictionary.

Unhashable type list

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. JeanBaptiste-dlb hwchase17 kacperlukawski. The text was updated successfully, but these errors were encountered:. Hello jeremi ,. I am Dosu , a bot designed to assist you with your technical issues, answer your questions, and guide you towards becoming a contributor. While you're waiting for a human maintainer, I'm here to help you with your issue. Let's get started!

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The TypeError: unhashable type: 'list' usually occurs when you try to use a list object as a set element or dictionary key and Python internally passes the unhashable list into the hash function. But as lists are mutable objects, they do not have a fixed hash value. The easiest way to fix this error is to use a hashable tuple instead of a non-hashable list as a dictionary key or set element. This is not a trivial problem because Python lists are mutable and, therefore, not hashable. In fact, the error can be reproduced most easily when calling hash lst on a list object lst. Because you cannot successfully pass a list into the hash function, you cannot directly use lists as set elements or dictionary keys.

The TypeError: unhashable type: 'list' usually occurs when you try to use a list object as a set element or dictionary key and Python internally passes the unhashable list into the hash function. But as lists are mutable objects, they do not have a fixed hash value. The easiest way to fix this error is to use a hashable tuple instead of a non-hashable list as a dictionary key or set element. This is not a trivial problem because Python lists are mutable and, therefore, not hashable. In fact, the error can be reproduced most easily when calling hash lst on a list object lst. Because you cannot successfully pass a list into the hash function, you cannot directly use lists as set elements or dictionary keys. The easiest way to fix the TypeError: unhashable type: 'list' is to use a hashable tuple instead of a non-hashable list as a dictionary key. The error may also occur when you try to use a list as a set element. To fix the TypeError: unhashable type: 'list' when trying to use a list as a set element is to use a hashable tuple instead of a non-hashable list. For example, whereas set.

Unhashable type list

As you already know list is a mutable Python object. For hashing an object it must be immutable like tuple etc. There are a few python objects which are not hashable like dict, list, byte array, set, user-defined classes, etc. When any of these objects come at the place where we treat them as a hashable object this error occurs. This article will show you different scenarios for this bug with their fix. See the below example. The fix for the above error is to convert typecasting the list into the tuple and insert it into the dict as the key.

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The easiest way to fix the TypeError: unhashable type: 'list' is to use a hashable tuple instead of a non-hashable list as a dictionary key. Error: TypeError unhashable type 'list' This error occurs when you try to use a list as key in the dictionary or set. I am Dosu , a bot designed to assist you with your technical issues, answer your questions, and guide you towards becoming a contributor. Their hash values can change over time. Aug 31, James has written hundreds of programming tuto Managing errors and exceptions in your code is challenging. Learn about the CK publication. Share This. I suggest temporarily rolling back the problematic change. A hashable object can be used as a key for a dictionary or as an element in a set. Is monkey patching considered good programming practice? This would help in identifying the exact line of code that's causing the issue. What is the python keyword "with" used for? We need to discuss it further, but I provided a PR to fix this for now:

The Python TypeError: unhashable type: 'list' usually means that a list is being used as a hash argument.

The issue is I think this commit: d7 It seems there is an issue in the refactor of JeanBaptiste-dlb. An object is hashable if it has a hash value that doesn't change during its lifetime. All reactions. Adding it to the comment where the langchain and docarray libs are. Issue: the issue langchain-ai I'm not sure about imports. It's a new LLM integration. Lists do not have an unchanging hash value. Sign in to comment. This would help in understanding the issue better.