为什么在 Mac 上尝试安装“pip install ball”时总是出错答案

【问题标题】：Why do I keep getting an error when trying to install "pip install ball" on Mac为什么在 Mac 上尝试安装“pip install ball”时总是出错
【发布时间】：2021-01-06 05:57:17
【问题描述】：

(venv) (base) matthewpark@Matthews-MBP game % pip install ball
Collecting ball
  Using cached Ball-0.2.9.tar.gz (348 kB)
    ERROR: Command errored out with exit status 1:
     command: /Users/matthewpark/PycharmProjects/game/venv/bin/python -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/xg/q1x0qzfn35588jpnk5b253zm0000gn/T/pip-install-smw00u2m/ball/setup.py'"'"'; __file__='"'"'/private/var/folders/xg/q1x0qzfn35588jpnk5b253zm0000gn/T/pip-install-smw00u2m/ball/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /private/var/folders/xg/q1x0qzfn35588jpnk5b253zm0000gn/T/pip-pip-egg-info-y5008n2o
         cwd: /private/var/folders/xg/q1x0qzfn35588jpnk5b253zm0000gn/T/pip-install-smw00u2m/ball/
    Complete output (5 lines):
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/private/var/folders/xg/q1x0qzfn35588jpnk5b253zm0000gn/T/pip-install-smw00u2m/ball/setup.py", line 6, in <module>
        import numpy as np
    ModuleNotFoundError: No module named 'numpy'
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
(venv) (base) matthewpark@Matthews-MBP game %

【问题讨论】：

错误消息显示ModuleNotFoundError: No module named 'numpy'。安装球前需要安装numpy

标签： python python-3.x macos installation pip

【解决方案1】：

如何在 python 中充分利用错误信息

(venv) (base) matthewpark@Matthews-MBP game % pip install ball
Collecting ball
  Using cached Ball-0.2.9.tar.gz (348 kB)
    ERROR: Command errored out with exit status 1:
     command: /Users/matthewpark/PycharmProjects/game/venv/bin/python -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/xg/q1x0qzfn35588jpnk5b253zm0000gn/T/pip-install-smw00u2m/ball/setup.py'"'"'; __file__='"'"'/private/var/folders/xg/q1x0qzfn35588jpnk5b253zm0000gn/T/pip-install-smw00u2m/ball/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /private/var/folders/xg/q1x0qzfn35588jpnk5b253zm0000gn/T/pip-pip-egg-info-y5008n2o
         cwd: /private/var/folders/xg/q1x0qzfn35588jpnk5b253zm0000gn/T/pip-install-smw00u2m/ball/
    Complete output (5 lines):
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/private/var/folders/xg/q1x0qzfn35588jpnk5b253zm0000gn/T/pip-install-smw00u2m/ball/setup.py", line 6, in <module>
        import numpy as np
    ModuleNotFoundError: No module named 'numpy'
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
(venv) (base) matthewpark@Matthews-MBP game %

不幸的是，错误消息中最相关的部分在最后。

首先搜索错误类型，如SystaxError或TypeError，此处为ModuleNotFoundError
然后查找错误类型后面的消息

在您的情况下，解决您的问题的信息是ModuleNotFoundError: No module named 'numpy'。在安装 ball 之前，您必须安装 numpy。

pip install numpy

【讨论】：