conda 安装 psycopg2 错误

Question

新的 mackbookpro 运行卡特琳娜。使用自制软件安装 anaconda。尝试使用命令 conda install -c anaconda psycopg2 安装 psycopg2 但由于包冲突而失败。这是尝试安装的一些输出：

$ conda install -c anaconda psycopg2
Collecting package metadata (current_repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source.
Collecting package metadata (repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Solving environment: / 
Found conflicts! Looking for incompatible packages.
This can take several minutes.  Press CTRL-C to abort.
failed                                                                                                                                                \ 

UnsatisfiableError: The following specifications were found to be incompatible with each other:

Output in format: Requested package -> Available versions

Package six conflicts for:
pyopenssl -> cryptography[version='>=2.8'] -> six[version='>=1.4.1']
pytest-doctestplus -> pytest[version='>=3.0'] -> six[version='>=1.10.0']
python-dateutil -> six[version='>=1.5']
nltk -> six

对发生的事情或如何解决有任何想法吗？

Answer 1

原因可能是 [anaconda==2020.02] 和 [70+ PACKAGES] 之间的冲突太多尝试以下对我有用的方法：

conda -V conda update -n base conda

确保你在版本畅达 4.8.2 然后

conda update --all

那么以下软件包将被降级：

蟒蛇 2020.02-py37_0 --> custom-py37_1

然后

conda install psycopg2

然后将安装 libpq、psycopg2 包，一些包将被更新，一些包将被更高优先级的频道取代。

Answer 2

我今天遇到了完全相同的情况，无法使用 conda 包管理器安装 psycopg2。但是当我尝试在 Anaconda Prompt 中用 pip 做同样的事情时，安装非常完美，只用了不到一分钟：

pip install psycopg2

conda 安装 psycopg2 错误

conda install psycopg2 errors

python

installation

psycopg2

anaconda