[Tutor] Union

[Mats Wichmann]

On 8/12/19 2:50 PM, Jim wrote:
> I was reading the docs for PySimpbleGUI here:
> https://pysimplegui.readthedocs.io/en/latest/#building-custom-windows
> 
> In the table of parameters for the Window() function for example the
> icon parameter the meaning is  Union[str, str] Can be either a filename
> or Base64 value.
> 
> What is the usage of "Union". I don't recall seeing anything like it
> before.

it's type annotation. Search here:

https://docs.python.org/3/library/typing.html