python - 验证编译扩展类型的兼容性，并将它们与 cdef 一起使用

Question

常设问题:

• 为什么 Cython 编译中的其他错误指向特定的错误行，而这个却没有？

更新前:

由于难以编译扩展类型，正如下面“不会编译”链接中所引用的，人们认为 AssertionError 与扩展类型有关(在它们的实例化被转移到主 pyx 文件之后)。

来自这个 forum post 的人说“如果你真的想要扩展类型，并想在你的代码中声明它们的类型，你需要在 .pxd 文件中声明它们的 C 属性。”

如果在这种情况下是这样，那么问题是 pyx 文件 won’t compile使用 pxd 文件时对我来说。在一个 pyx 文件中编译扩展类型时没有错误，但在导入后使用扩展类型时，我收到错误 extTypeName is not a type identifier 。

有人告诉我 comments扩展类型可以在 pyx 文件中定义，主要功能使用它们。这样做时，我收到一个我不知道如何跟踪的错误(AssertionError:unexpected type int and base type tuple object for indexing)。完整的追溯发布在下面。

---

错误难以追踪

尝试使用同一 pyx 文件中声明的扩展类型进行编译时的回溯(我不确定这是问题的根源):

Traceback (most recent call last):
  File "setup.py", line 37, in <module>
    ext_modules = [Extension("HintToCRdict", ["HintToCRdict.pyx"])]
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/core.py", line 151, in setup
    dist.run_commands()
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 953, in run_commands
    self.run_command(cmd)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 972, in run_command
    cmd_obj.run()
  File "/Library/Python/2.7/site-packages/Cython/Distutils/build_ext.py", line 164, in run
    _build_ext.build_ext.run(self)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/command/build_ext.py", line 337, in run
    self.build_extensions()
  File "/Library/Python/2.7/site-packages/Cython/Distutils/build_ext.py", line 171, in build_extensions
    ext.sources = self.cython_sources(ext.sources, ext)
  File "/Library/Python/2.7/site-packages/Cython/Distutils/build_ext.py", line 324, in cython_sources
    full_module_name=module_name)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Main.py", line 688, in compile
    return compile_single(source, options, full_module_name)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Main.py", line 638, in compile_single
    return run_pipeline(source, options, full_module_name)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Main.py", line 495, in run_pipeline
    err, enddata = Pipeline.run_pipeline(pipeline, source)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Pipeline.py", line 365, in run_pipeline
    data = phase(data)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Pipeline.py", line 53, in generate_pyx_code_stage
    module_node.process_implementation(options, result)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/ModuleNode.py", line 131, in process_implementation
    self.generate_c_code(env, options, result)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/ModuleNode.py", line 359, in generate_c_code
    self.body.generate_function_definitions(env, code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 435, in generate_function_definitions
    stat.generate_function_definitions(env, code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 1944, in generate_function_definitions
    self.generate_function_body(env, code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 1698, in generate_function_body
    self.body.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 441, in generate_execution_code
    stat.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 441, in generate_execution_code
    stat.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 5851, in generate_execution_code
    if_clause.generate_execution_code(code, end_label, is_last=i == last)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 5894, in generate_execution_code
    self.body.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 441, in generate_execution_code
    stat.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/UtilNodes.py", line 321, in generate_execution_code
    self.body.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 6402, in generate_execution_code
    self.body.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 441, in generate_execution_code
    stat.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/UtilNodes.py", line 321, in generate_execution_code
    self.body.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 6402, in generate_execution_code
    self.body.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 441, in generate_execution_code
    stat.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 5851, in generate_execution_code
    if_clause.generate_execution_code(code, end_label, is_last=i == last)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 5894, in generate_execution_code
    self.body.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 441, in generate_execution_code
    stat.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/UtilNodes.py", line 89, in generate_execution_code
    self.body.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 441, in generate_execution_code
    stat.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 6015, in generate_execution_code
    self.body.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 441, in generate_execution_code
    stat.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 6192, in generate_execution_code
    self.body.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 441, in generate_execution_code
    stat.generate_execution_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 4786, in generate_execution_code
    self.generate_rhs_evaluation_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/Nodes.py", line 5073, in generate_rhs_evaluation_code
    self.rhs.generate_evaluation_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/ExprNodes.py", line 699, in generate_evaluation_code
    self.generate_subexpr_evaluation_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/ExprNodes.py", line 714, in generate_subexpr_evaluation_code
    node.generate_evaluation_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/ExprNodes.py", line 699, in generate_evaluation_code
    self.generate_subexpr_evaluation_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/ExprNodes.py", line 714, in generate_subexpr_evaluation_code
    node.generate_evaluation_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/ExprNodes.py", line 705, in generate_evaluation_code
    self.generate_result_code(code)
  File "/Library/Python/2.7/site-packages/Cython/Compiler/ExprNodes.py", line 3737, in generate_result_code
    self.type, self.base.type)
AssertionError: unexpected type int and base type tuple object for indexing

Answer 1

回复我可以从你的消息中得到什么。

1. 在 Cython 中使用 Python 对象是可能的，但只要您 cdef 某些部分就会受到限制。尝试“un”-cdefing dict。
2. 您遇到的错误表明您有一个表达式是 x[y]，其中 x 是一个元组，y 是一个整数。原则上它应该可以正常工作(用 int 索引元组应该没问题)。因此，您可以查看 Cython 中的方括号以找出它的来源。
3. 您提到删除了 pxd 文件。然后，您是否将扩展类/其他类型定义的完整声明移至 pyx 文件？