在同一环境下使用不同版本的 python 包

Question

我需要在同一个 virtualenv 中安装不同版本的 elasticseach-dsl。我希望能够使用某种别名导入它们：

import elasticsearch_dsl1
import elasticsearch_dsl2
import elasticsearch_dsl5

我正在考虑创建名为 elasricsearch_dsl* 的包，并在它们的 setup.py 中添加正确版本 elasticsearch_dsl 的安装要求，但是当我安装这些包时，它会导致冲突，因为我所有的包都需要同一个库的不同版本。我不知道如何进行以及是否可行。

非常感谢大家

Answer 1

简答：

不可能。

Answer 2

我找到了解决问题的方法。

我下载了elasticsearch-dsl个不同版本库的源码
然后将导入语句更改为使用 elasticsearch1、elasticsearch2 etc.libraries 而不是 elasticsearch v1.x 和 v2.x

# example `elasticsearch-dsl` v5.4.0
from elasticsearch import Elasticsearch #  --> from elasticsearch5 import Elasticsearch

修改了setup.py，将elasticsearch的依赖关系更改为elasticsearch1、elasticsearch2等elasticsearch-dsl[=42的每个版本=]

我很幸运，因为elasticsearch1、elasticsearch2...的存在，否则我将不得不为他们重复同样的程序。更幸运的是各个版本库的依赖兼容性。

我并不为这个 hack 感到骄傲，但它确实有效。

setup.py

elasticsearch-dls==7.3.0 的 setup.py 文件示例，然后是 elasticsearch-dsl7

from os.path import join, dirname
from setuptools import setup, find_packages

VERSION = (7, 3, 0)
__version__ = VERSION
__versionstr__ = ".".join(map(str, VERSION))

f = open(join(dirname(__file__), "README"))
long_description = f.read().strip()
f.close()

install_requires = [
    "six",
    "python-dateutil",
    "elasticsearch7",  # before "elasticsearch>=7.0.0,<8.0.0"    <---
    # ipaddress is included in stdlib since python 3.3
    'ipaddress; python_version<"3.3"',
]

tests_require = [
    "mock",
    "pytest>=3.0.0",
    "pytest-cov",
    "pytest-mock<3.0.0",
    "pytz",
    "coverage<5.0.0",
]

setup(
    name="elasticsearch-dsl7", #    <---
    description="Python client for Elasticsearch",
    license="Apache-2.0",
    url="https://github.com/elasticsearch/elasticsearch-dsl-py",
    long_description=long_description,
    version=__versionstr__,
    author="Honza Král",
    author_email="honza.kral@gmail.com",
    maintainer="Seth Michael Larson",
    maintainer_email="seth.larson@elastic.co",
    packages=find_packages(where=".", exclude=("test_elasticsearch_dsl*",)),
    python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*",
    classifiers=[
        "Development Status :: 4 - Beta",
        "License :: OSI Approved :: Apache Software License",
        "Intended Audience :: Developers",
        "Operating System :: OS Independent",
        "Programming Language :: Python",
        "Programming Language :: Python :: 2",
        "Programming Language :: Python :: 2.7",
        "Programming Language :: Python :: 3",
        "Programming Language :: Python :: 3.4",
        "Programming Language :: Python :: 3.5",
        "Programming Language :: Python :: 3.6",
        "Programming Language :: Python :: 3.7",
        "Programming Language :: Python :: 3.8",
        "Programming Language :: Python :: 3.9",
        "Programming Language :: Python :: Implementation :: CPython",
        "Programming Language :: Python :: Implementation :: PyPy",
    ],
    install_requires=install_requires,
    test_suite="test_elasticsearch_dsl.run_tests.run_all",
    tests_require=tests_require,
    extras_require={"develop": tests_require + ["sphinx", "sphinx_rtd_theme"]},
)

在同一环境下使用不同版本的 python 包

Use different version of python package in the same environment

python

dependencies

pip

package

elasticsearch

setup.py