python - 自己的pip python包导入不起作用

Question

我目前正在尝试创建我的第一个 python 包。可悲的是我遇到了一些错误。我只是想定义一些应该可导入的类。

这是我的文件夹结构

/pip-blitz-query
    /blitzjs_query
        __init__.py
        blitz.py
        blitz_http.py
        ...
    setup.py

这是我尝试从 blitzjs_query 导入类 Blitz 时发生的错误:

>>> import blitzjs_query
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python34\lib\site-packages\blitzjs_query\__init__.py", line 1, in <module>
    from blitz import Blitz
ImportError: No module named 'blitz'

这是我的 __init__.py 文件:

from blitz import Blitz
from connection import Connection
from blitz_queue import Queue
from blitz_socket import Socket
from blitz_http import Http

最后是我的 setup.py 文件。我已经尝试了 __init__.py 文件的不同变体，有些里面什么也没有——但它根本行不通

# Always prefer setuptools over distutils
from setuptools import setup, find_packages
# To use a consistent encoding
from codecs import open
from os import path

# Get the long description from the README file
here = path.abspath(path.dirname(__file__))
with open(path.join(here, 'README.rst'), encoding='utf-8') as f:
    long_description = f.read()

setup(
    name='blitzjs_query',

    version='0.0.2',

    description='HTTP/Socket.io adapter for the blitz.js framework',
    long_description=long_description,

    url='https://github.com/nexus-devs/pip-blitz-query',

    author='Nexus Devs',
    author_email='nexus@nexus-stats.com',

    license='MIT',

    classifiers=[
        'Development Status :: 1 - Planning',
        'Intended Audience :: Developers',
        'Topic :: Internet :: WWW/HTTP',
        'License :: OSI Approved :: MIT License',

        'Programming Language :: Python :: 3',
        'Programming Language :: Python :: 3.3',
        'Programming Language :: Python :: 3.4',
        'Programming Language :: Python :: 3.5',
        'Programming Language :: Python :: 3.6',
    ],

    keywords='development blitz nexus socket.io http',

    packages=find_packages(),

    install_requires=['pymitter', 'socketIO-client', 'promise', 'requests'],
)

Answer 1

通常您使用相对导入(在子模块前加上一个或多个 .):

from .blitz import Blitz
from .connection import Connection
from .blitz_queue import Queue
from .blitz_socket import Socket
from .blitz_http import Http

因为您没有创建名为 blitz 的模块，而只创建了一个子模块 blitzjs_query.blitz。

可以引用PEP 328有关相对和绝对导入的更多信息:

Guido has Pronounced that relative imports will use leading dots. A single leading dot indicates a relative import, starting with the current package. Two or more leading dots give a relative import to the parent(s) of the current package, one level per dot after the first. [...]