Cleo2.x break backward compatible with optional value

[zlogz101]

Before Cleo 1.0, there was a nice feature for an optional value to a option.

It was implemented by clikit as below:
clikit.OPTION_OPTIONAL_VALUE
--option=?
This option may or may not have a value (e.g. --yell or --yell=loud)

However, from Cleo 1.0, optional value has been removed, which cause existing application hard to upgrade to the latest Cleo version.

Is there any suggestion to this issue? Many thanks.

[neersighted]

I think what you are trying to achieve is easily done with Option(name, flag=False, requires_value=False).

[zlogz101]

@neersighted Many think for you kind response :)

Option(name, flag=False, requires_value=False) is our first choice, however, it can't identify below two scenarios:

1. -y without value: return None
2. Not specify -y: return None

Clikit return string "null" for the first scenario. We also need two different values to meet our requirements.

[Secrus]

Returning "null" string is definitely not something that is going to come back. However, if you need 2 different values, wouldn't setting default solve your issue? I would expect that Cleo returns None when there is no argument and default when an option has no given value.

[zlogz101]

Cool! Many thanks to @Secrus , that's what I want, it works for me :)

[zlogz101]

The problem has been solved.