Unhashable values in dictionary keys and set elements

Reports unhashable expressions used as dictionary keys, set values, or hash arguments.

Examples:

d = {[]: 3}  # list is unhashable
set().add({1: 2})  # dict is unhashable
hash([])  # list is unhashable

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

PyUnhashable

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Python

Inspection ID: PyUnhashableInspection

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection PyUnhashable

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

Inspection Details
By default bundled with:	CLion 2026.1, DataSpell 2026.1, IntelliJ IDEA 2026.1, PyCharm 2026.1, Qodana for JVM 2026.1,

Last modified: 31 March 2026