19 lines
1.4 KiB
Markdown
19 lines
1.4 KiB
Markdown
---
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id: d637ad5b-0ad1-4164-b737-b870fce85ae1
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type: code_pattern
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title: "Pattern: Lazy import inside function body to break circular imports"
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tags: [paper-dynasty, card-creation, card_builder, calcs_batter, circular_import, lazy_import, python]
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importance: 0.6
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confidence: 0.8
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created: "2026-02-25T22:26:37.747893+00:00"
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updated: "2026-02-25T22:27:03.733654+00:00"
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relations:
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- target: c7623317-ea0a-4b8a-9375-65fc3aac5303
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type: FOLLOWS
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direction: outgoing
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strength: 0.8
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edge_id: 06095a46-699a-47bf-a1f1-418605b03d0f
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---
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## Problem\nbatters/card_builder.py imports from batters/calcs_batter.py (needs BattingCardRatingsModel). If calcs_batter.py also imported from card_builder.py at module level, this would cause a circular ImportError.\n\n## Solution: Lazy Import Inside Function Body\n```python\n# In batters/calcs_batter.py — inside get_batter_ratings():\ntry:\n from batters.card_builder import build_batter_full_cards\n vl_card, vr_card = build_batter_full_cards(...)\n vl_dict.update(vl_card.card_output())\n vr_dict.update(vr_card.card_output())\nexcept Exception as e:\n logger.warning(f'Card layout builder failed: {e}')\n```\n\nSame pattern used in pitchers/calcs_pitcher.py:\n```python\nfrom pitchers.card_builder import build_pitcher_full_cards\n```\n\n## Why It Works\nThe import only executes when the function is called, not at module load time, so the circular dependency never materializes at import resolution.
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