为什么 conda 不升级 windows 上的某些软件包

Question

当我做的时候

conda update --all

它不提供任何升级。

但如果我这样做（例如）

conda update pandas

我明白了

The following packages will be UPDATED:

    numpy:  1.9.3-py27_0      --> 1.10.1-py27_0
    pandas: 0.16.2-np19py27_0 --> 0.17.0-np110py27_0

这是为什么？

Answer 1

conda 在您更新时自动检查依赖项。

Pandas 可以与 NumPy 1.10.1 一起使用，但可能您还有其他软件包仍然需要 NumPy 1.9.3。

如果您要更新 NumPy 然后尝试更新所有其他包，它可能会要求您将 NumPy 降级回 1.9.3。

Answer 2

从这里开始：

It's a compatibility issue. Anaconda is a stable set of packages. When you update Anaconda, you update to this stable list.

However, when you update individual packages, they might cause incompatibility issues with the rest of the Anaconda distribution so they aren't considered stable. That's why when you use conda update --all, it gets you to the latest stable Anaconda distribution, which might or might not have the version of the individual package you wanted.

See here: https://github.com/ContinuumIO/anaconda-issues/issues/39

Edit: This behavior has changed. It now tries to increase the version of all packages (except Python between major/minor version) such that no packages will be incompatible with each other.

See here: http://continuum.io/blog/advanced-conda-part-1#conda-update-all

-Ringil

为什么 conda 不升级 windows 上的某些软件包

Why does conda not upgrade some packages on windows

python

windows

anaconda

conda