ponder-lab / Hybridize-Functions-Refactoring / 25753932090

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Classify `def f(self):` as an instance method. (#475)

Closes #324.

`Function.isMethod()` required `parameters.size() > 1`, so a Python
method whose only parameter is `self` (e.g., `def __init__(self):`)
was classified as not-a-method. Relax to `>= 1`: a function whose
first parameter is named `self` is an instance method regardless of
arity. Top-level functions don't take a `self` parameter in real
code, so the false-positive surface is essentially zero.

Adds regression test `testSelfOnlyMethod` exercising
`def f(self): return tf.constant(1)`. Test fails on the prior
behavior and passes after the fix.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

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