XPath expression to select all button or input type submit/button elements

I’m writing a Python script that uses Selenium to select all clickable buttons by XPath.

I have these XPath expressions:

//button
//input[@type='submit']
//input[@type='button']

Is there a way to join these in a single XPath expression, to select only these types of elements?

>Solution :

You can check for the names and the attributes

//*[name()='button' or (name()='input' and (@type='submit' or @type='button'))]

or use the merge operator on three different queries

//button | //input[@type='submit'] | // input[@type='button']

Output should be the same, but the resulting order may be different.