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Add comprehensive lazy import tests ported from internal test suite · python/cpython@15f157e · GitHub

  1. python
  2. cpython

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Commit 15f157e

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brittanyrey
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Add comprehensive lazy import tests ported from internal test suite
Port missing test coverage from the internal lazy imports test suite to cpython's test_lazy_import, covering behaviors not previously tested: - Dict operations with lazy values (copy, |, update, values/items) - from X import * resolution behavior with lazy imports - Submodule laziness (unused submodules stay lazy, side effects) - Attribute side effects (submodule imports don't overwrite parent attrs) - Module/variable name collisions (submodule vs variable ordering) - Deleted module reimport (sys.modules deletion and reimport) - Circular import resolution (lazy imports breaking circular deadlocks) - Custom __import__ via exec with lazy imports - Dict mutation during module loading - Runtime enable/disable of lazy imports via sys.set_lazy_imports() Adds supporting test data modules: metasyntactic package hierarchy, versioned package, module_same_name_var_order packages, circular_import_pkg, and cycle_with_load_global_pkg.
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‎Lib/test/test_lazy_import/__init__.py‎

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‎Lib/test/test_lazy_import/data/circular_import_pkg/__init__.py‎

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‎Lib/test/test_lazy_import/data/circular_import_pkg/main.py‎

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from .x import X2
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X2()

‎Lib/test/test_lazy_import/data/circular_import_pkg/x.py‎

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def X1():
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return "X"
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from .y import Y1
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def X2():
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return Y1()

‎Lib/test/test_lazy_import/data/circular_import_pkg/y.py‎

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def Y1():
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return "Y"
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from .x import X2
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def Y2():
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return X2()

‎Lib/test/test_lazy_import/data/cycle_with_load_global_pkg/__init__.py‎

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‎Lib/test/test_lazy_import/data/cycle_with_load_global_pkg/a.py‎

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from .b import B
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def get_B():
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return B
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B

‎Lib/test/test_lazy_import/data/cycle_with_load_global_pkg/b.py‎

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B = "B"
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from .a import get_B
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get_B()

‎Lib/test/test_lazy_import/data/metasyntactic/__init__.py‎

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‎Lib/test/test_lazy_import/data/metasyntactic/foo/__init__.py‎

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Foo = "Foo"

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