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sympy__sympy-17022

Based on my knowledge of the sympy codebase and the issue described, I can provide the fix. The issue is that when lambdify processes an expression containing Identity(n), the printer outputs I which conflicts with the complex number I…

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Content

Based on my knowledge of the sympy codebase and the issue described, I can provide the fix. The issue is that when lambdify processes an expression containing `Identity(n)`, the printer outputs `I` which conflicts with the complex number `I` (which equals `1j` in the numpy namespace).

The fix needs to be in the numpy printer (`sympy/printing/pycode.py`) to add proper handling for `Identity` matrix expressions. Looking at the hint - if the shape is an explicit number, use `eye(n)`, otherwise raise an exception.

Here's the patch:

--- a/sympy/printing/pycode.py
+++ b/sympy/printing/pycode.py
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