為什么pip不安裝一個package？

Question

pip install表示nitime package安裝成功但沒有安裝成功。 為什么是這樣？

$ pip3 install nitime
Defaulting to user installation because normal site-packages is not writeable
Collecting nitime
  Using cached nitime-0.9.tar.gz (6.2 MB)
  Preparing metadata (setup.py) ... done
Requirement already satisfied: numpy in ./.local/lib/python3.8/site-packages (from nitime) (1.22.3)
Requirement already satisfied: cython in /usr/lib64/python3.8/site-packages (from nitime) (0.29.14)
Requirement already satisfied: scipy in ./.local/lib/python3.8/site-packages (from nitime) (1.8.0)
Requirement already satisfied: matplotlib in /usr/lib64/python3.8/site-packages (from nitime) (3.2.2)
Requirement already satisfied: networkx in /usr/lib/python3.8/site-packages (from nitime) (2.5)
Requirement already satisfied: nibabel in ./.local/lib/python3.8/site-packages (from nitime) (3.2.2)
Requirement already satisfied: cycler>=0.10 in /usr/lib/python3.8/site-packages (from matplotlib->nitime) (0.10.0)
Requirement already satisfied: kiwisolver>=1.0.1 in /usr/lib64/python3.8/site-packages (from matplotlib->nitime) (1.3.1)
Requirement already satisfied: pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=2.0.1 in /usr/lib/python3.8/site-packages (from matplotlib->nitime) (2.4.7)
Requirement already satisfied: python-dateutil>=2.1 in ./.local/lib/python3.8/site-packages (from matplotlib->nitime) (2.8.2)
Requirement already satisfied: decorator>=4.3.0 in /usr/lib/python3.8/site-packages (from networkx->nitime) (4.4.0)
Requirement already satisfied: packaging>=14.3 in ./.local/lib/python3.8/site-packages (from nibabel->nitime) (21.3)
Requirement already satisfied: setuptools in ./.local/lib/python3.8/site-packages (from nibabel->nitime) (60.6.0)
Requirement already satisfied: six in /usr/lib/python3.8/site-packages (from cycler>=0.10->matplotlib->nitime) (1.14.0)
Using legacy 'setup.py install' for nitime, since package 'wheel' is not installed.
Installing collected packages: nitime
  Running setup.py install for nitime ... done
Successfully installed nitime
$ pip3 show nitime
WARNING: Package(s) not found: nitime
$ python3 -c "import nitime"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'nitime'


$ pip3 show pip
Name: pip
Version: 22.0.4
Summary: The PyPA recommended tool for installing Python packages.
Home-page: https://pip.pypa.io/
Author: The pip developers
Author-email: distutils-sig@python.org
License: MIT
Location: /home/servoz/.local/lib/python3.8/site-packages
Requires: 
Required-by: 
$ uname -a
Linux 5.11.22-100.fc32.x86_64 #1 SMP Wed May 19 18:58:25 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
$ python3 -V
Python 3.8.10

編輯：好的！ 我設法使用dnf install python3-nitime (fedora) 安裝。

我真的不明白為什么 pip 不能在 fedora 上與 nitime 一起使用...

Answer 1

這可能是因為與其他包沖突，所以請嘗試在新環境中執行此操作。 嘗試創建一個虛擬環境。 使用這個安裝virtualenv ：

pip install virtualenv

使用以下命令創建一個名為venv的虛擬環境：

virtualenv venv

要激活虛擬環境，請使用：

source ./venv/bin/activate

現在嘗試安裝nitime ：

pip3 install nitime

完畢！

您可以使用以下命令停用虛擬環境：

deactivate