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Support nested objects/recursion in mo.inspect #11071
Description
Activity
Thanks for the report @daniilS
When
mo.inspectrenders a list, each element goes through the marimo's normal formatting.The
PointandLinecalss have no__repr__, so each element falls back to default Python object representation<Line object at 0x...>You can either implement
__repr__on those classes, see docs (and example) or make them dataclasses like below.from dataclasses import dataclass @dataclass class Point: x: float y: float @dataclass class Line: p1: Point p2: Point @property def length(self) -> float: return ((self.p2.x - self.p1.x) ** 2 + (self.p2.y - self.p1.y) ** 2) ** 0.5 lines = [Line(Point(0, 0), Point(i, i)) for i in range(5)] mo.inspect(lines)
Output:
@kirangadhave yes, but
mo.inspectis specifically meant for objects that lack a rich representation, hence my feature request to make it apply recursively to object attributes that also lack a built-in__repr__. In my example,LineandPointare a stand-in for e.g. objects from a third-party library where I have no control over the__repr__. That's exactly whymo.inspect(Point(0, 0))is useful, because it allows debugging without needing to modify the representation of an existing object.I agree, but adding support for nested data structure require handling circular references correctly. It's something we would like to do, so I will track the work as todo, but I don't have a timeline on when we will prioritize it.
Meanwhile for 3rd party libs, you could do something like this to add
__repr__support.Warning
I know this is hacky and this will replace an existing
__repr__if the class has one. But it might be okay for temporary debugging purposes.
Description
mo.inspectis one of my favourite underrated marimo features. However, quite often I'm dealing with lists of objects, for whichinspectjust prints the default representation for each child. It'd be great to be able to expand nested objects to view their details in the same way.Simple example code:
Current marimo output:
For reference, I am thinking of something similar to the
console.logimplementation of most browsers, e.g. Chrome:Firefox:
Are you willing to submit a PR? (You must receive approval from the team before submitting a PR.)
Alternatives
No response
Additional context
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