调用Pkg_resources.resource_string时出错

Question

我有点困惑。我正在处理一个Python项目，在那里我加载一个资源文件，将其读作tsv并将其转换为一个字典，其中模式对象作为以后使用的关键。要加载文件，到目前为止我已经使用了setuptools中的pkg_resources包。它基本上是这样的：

from csv import DictReader
from pkg_resources import resource_string

def make_dict():
    """Make global dictionary."""
    global event_dict
    dictlines = [l.decode('utf8') for l in resource_string(
            'pkgname.resources.tsv', 'event_dict.tsv').splitlines()]
    reader = DictReader(dictlines, dialect='excel-tab')
    for row in reader:
        event = re.compile(r'\b{}\b'.format(re.escape(row['word'])))
        classes = string_to_list(row['id'])
        event_dict[event] = classes

到目前为止，它运作良好。但是，一旦我开始从另一个模块调用该模块，就会出现以下错误：

---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
C:\Python\Python36\lib\site-packages\pkg_resources\__init__.py in get_provider(moduleOrReq)
    430     try:
--> 431         module = sys.modules[moduleOrReq]
    432     except KeyError:

KeyError: 'pkgname.resources.tsv'

During handling of the above exception, another exception occurred:

ModuleNotFoundError                       Traceback (most recent call last)
<ipython-input-22-efa35954c76f> in <module>()
----> 1 make_event_dict()

<ipython-input-21-b318bc78e8fd> in make_event_dict()
      4     global event_dict
      5     dictlines = [l.decode('utf8') for l in resource_string(
----> 6             'pkgname.resources.tsv', 'event_classes_dict.tsv').splitlines()]
      7     reader = DictReader(dictlines, dialect='excel-tab')
      8     for row in reader:

C:\Python\Python36\lib\site-packages\pkg_resources\__init__.py in resource_string(self, package_or_requirement, resource_name)
   1215     def resource_string(self, package_or_requirement, resource_name):
   1216         """Return specified resource as a string"""
-> 1217         return get_provider(package_or_requirement).get_resource_string(
   1218             self, resource_name
   1219         )

C:\Python\Python36\lib\site-packages\pkg_resources\__init__.py in get_provider(moduleOrReq)
    431         module = sys.modules[moduleOrReq]
    432     except KeyError:
--> 433         __import__(moduleOrReq)
    434         module = sys.modules[moduleOrReq]
    435     loader = getattr(module, '__loader__', None)

ModuleNotFoundError: No module named 'pkgname'

现在我猜测我的项目设置有问题，所以这就是它的结构：

|Pkg\
|----setup.py
|----pkg\
|--------__init__.py
|--------events.py
|--------resources\
|------------__init__.py
|------------tsv\
|----------------__init__.py
|----------------event_dict.tsv

可能有什么不对？不确定是否需要子文件夹中的__init__.py，顺便说一下。