python - 使用 plac 时出现 AttributeError：“命名空间”对象没有属性

Question

试图编写一个命令行函数，我被这个 AttributeError 所阻碍。我知道其他人也问过类似的问题，但我没有看到任何使用 plac 所以我想我会写出来。

@plac.annotations(
    training_file=("The filename containing the text you wish to annotate", "option", "-tf", Path),
    entity_type=("The name of the entity you wish to annotate", "option", "-e", str)
)
def main(training_file=None, entity_type=None):
    """Script to more easily annotate spaCy NER training examples"""

    if not training_file:
        training_file = input("Please enter the filename of the data you wish to annotate: ")
        with open(training_file, 'r') as training_file:
            list_to_annotate = training_file.read()

        print(list_to_annotate)

以及它的运行位置：

if __name__ == "__main__":
    plac.call(main)

我的实际命令还有更多内容，但是每当我运行它时，我都会收到相同的错误消息：

Traceback (most recent call last):
  File "C:\Users\Steve\PycharmProjects\GroceryListMaker\model_scripts\training_data_maker.py", line 79, in <module>
    plac.call(main)
  File "C:\Users\Steve\PycharmProjects\GroceryListMaker\lib\site-packages\plac_core.py", line 367, in call
    cmd, result = parser.consume(arglist)
  File "C:\Users\Steve\PycharmProjects\GroceryListMaker\lib\site-packages\plac_core.py", line 230, in consume
    args = [getattr(ns, a) for a in self.argspec.args]
  File "C:\Users\Steve\PycharmProjects\GroceryListMaker\lib\site-packages\plac_core.py", line 230, in <listcomp>
    args = [getattr(ns, a) for a in self.argspec.args]
AttributeError: 'Namespace' object has no attribute 'training_file'

我真的不知道出了什么问题，这让我把头发扯掉了。非常感谢任何帮助，谢谢。

标签： pythonnamespacesargparse

Answer 1

如果您将其替换为：

@plac.annotations(
    training_file=("The filename containing the text you wish to annotate",
        "option", "tf", Path),
    entity_type=("The name of the entity you wish to annotate", "option", "e", str)
)

它有效（请注意，我删除-了缩写中的 ）。

将来您可以使用 pdb 更快地跟踪此类问题。这是我所做的：

$ python -m pdb main.py
> /home/embray/src/junk/so/60005716/main.py(1)<module>()
-> import plac
(Pdb) cont
Traceback (most recent call last):
  File "/usr/lib/python3.6/pdb.py", line 1667, in main
    pdb._runscript(mainpyfile)
  File "/usr/lib/python3.6/pdb.py", line 1548, in _runscript
    self.run(statement)
  File "/usr/lib/python3.6/bdb.py", line 434, in run
    exec(cmd, globals, locals)
  File "<string>", line 1, in <module>
  File "/home/embray/src/junk/so/60005716/main.py", line 1, in <module>
    import plac
  File "/home/embray/.virtualenvs/tmp-954ecd64f7669c29/lib/python3.6/site-packages/plac_core.py", line 367, in call
    cmd, result = parser.consume(arglist)
  File "/home/embray/.virtualenvs/tmp-954ecd64f7669c29/lib/python3.6/site-packages/plac_core.py", line 230, in consume
    args = [getattr(ns, a) for a in self.argspec.args]
  File "/home/embray/.virtualenvs/tmp-954ecd64f7669c29/lib/python3.6/site-packages/plac_core.py", line 230, in <listcomp>
    args = [getattr(ns, a) for a in self.argspec.args]
AttributeError: 'Namespace' object has no attribute 'training_file'
Uncaught exception. Entering post mortem debugging
Running 'cont' or 'step' will restart the program
> /home/embray/.virtualenvs/tmp-954ecd64f7669c29/lib/python3.6/site-packages/plac_core.py(230)<listcomp>()
-> args = [getattr(ns, a) for a in self.argspec.args]
(Pdb) up
> /home/embray/.virtualenvs/tmp-954ecd64f7669c29/lib/python3.6/site-packages/plac_core.py(230)consume()
-> args = [getattr(ns, a) for a in self.argspec.args]
(Pdb) p ns
Namespace(e=None, tf=None)

在这里，您可以看到您的参数命名空间被替换为eand tf，这表明以某种方式将 a-放入缩写实际上替换了参数名称（这只是我的猜测，但结果证明是正确的）。

我认为这是 plac 部分的一个错误——它非常令人困惑，并且文档没有说明任何关于此的内容。