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How to infer appropriate `dtype` from `uint` to `int` and `float` to `complex`?

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Assessment

Difficulty
5/5
Estimated time
Over a week
Newbie friendliness
25/100
Issue type
Documentation
Clarity
Needs clarification
Activity status
Stale
Tech stack
python
Domain
data

Research direction

Review the linked type-promotion rules alongside the f and g examples; determine whether the standard already defines a dtype inference mechanism for these operations. Done means a clear recommendation for implementing both operations, or a concrete specification clarification if the rules do not answer the question.

Written by the indexing model from the issue text.

Description

topic: Complex Data Types topic: Type Promotion

I would like to compute $f(x) := xi$, $g(y) := y - 1$ where $i$ is an imaginary number, $x$ is float and $y$ is uint, using array-api. However, I am not sure what is the best way to implement it. Following the type promotion rules

def f(x: xp.array) -> xp.array:
	return x * xp.array(1j, dtype=xp.complex64 if x.dtype == xp.float32 else xp.complex128)

def g(x: xp.array) -> xp.array:
	return x - xp.array(1, dtype=xp.int16 if x.dtype == xp.uint8 else xp.int32 if x.dtype == xp.uint16 else  xp.int64)

This seems too redundant. What is the proper way to do this?

Dominant language
Python
Stars
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Forks
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PR merge metrics
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