找不到满足要求的版本backports.temp文件（摘自z3c.RML）

Question

我有一台Debian机器，安装了以下软件包： python3，python3 virtualenv，python3 virtualenv，python3报告实验室

我创建了一个虚拟环境：

virtualenv --system-site-packages -p python3 venv
source venv/bin/activate

在此之后，我尝试使用pip安装z3c.RML包：

^{pr2}$

这是我得到的输出：

Downloading/unpacking z3c.RML
  Downloading z3c.rml-3.2.0.tar.gz (1.7MB): 1.7MB downloaded
  Running setup.py (path:/tmp/pip-build-zuhtd3uu/z3c.RML/setup.py) egg_info for package z3c.RML

    warning: no previously-included files matching '*.png' found under directory 'src/z3c/rml/tests/output'
    warning: no previously-included files matching '*.pdf' found under directory 'src/z3c/rml/tests/output'
    warning: no previously-included files matching '*.png' found under directory 'src/z3c/rml/tests/expected'
    warning: no previously-included files matching '*.pyc' found anywhere in distribution
Downloading/unpacking PyPDF2>=1.25.1 (from z3c.RML)
  Downloading PyPDF2-1.26.0.tar.gz (77kB): 77kB downloaded
  Running setup.py (path:/tmp/pip-build-zuhtd3uu/PyPDF2/setup.py) egg_info for package PyPDF2

Downloading/unpacking Pygments (from z3c.RML)
  Downloading Pygments-2.2.0-py2.py3-none-any.whl (841kB): 841kB downloaded
Downloading/unpacking backports.tempfile (from z3c.RML)
  Could not find a version that satisfies the requirement backports.tempfile (from z3c.RML) (from versions: 1.0rc1, 1.0rc1)
Cleaning up...
No distributions matching the version for backports.tempfile (from z3c.RML)
Storing debug log for failure in /root/.pip/pip.log

有人知道我做错了什么吗？-谢谢

Answer 1

问题是backports.temp文件从未发布该包的最终版本。您需要将 pre选项传递给pip。如果不希望所有软件包都安装预发布版本，请执行以下操作：

pip install  pre backports.tempfile

pip install z3c.rml