Improper first parameter

Reports methods that lack the first parameter that is usually named self.

Example:

class Movie:

   def show():
       pass

When the quick-fix is applied, the code changes to:

class Movie:

   def show(self):
       pass

The inspection also reports naming issues in class methods.

Example:

class Movie:
    @classmethod
    def show(abc):
        pass

Since the first parameter of a class method should be cls, the IDE provides a quick-fix to rename it.

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.

PyMethodParameters

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: PyMethodParametersInspection

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 PyMethodParameters

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 2025.2, DataSpell 2025.2, IntelliJ IDEA 2025.2, PyCharm 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025