找不到模块PIL，但已安装并更新

Question

我试图在Mac OS X上下载有刮痕的图像，它返回以下错误消息：

ModuleNotFoundError: No module named 'PIL'
$ pip install image
Requirement already satisfied: image in /Library/Python/2.7/site-packages (1.5.27)
Requirement already satisfied: django in /Library/Python/2.7/site-packages (from image) (1.11.16)
Requirement already satisfied: pillow in /Library/Python/2.7/site-packages (from image) (5.3.0)
Requirement already satisfied: pytz in /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python (from django->image) (2013.7)

让我们尝试安装映像包：

$ pip install image
Reqfuirement already satisfied: image in /Library/Python/2.7/site-packages (1.5.27)
Requirement already satisfied: django in /Library/Python/2.7/site-packages (from image) (1.11.16)
Requirement already satisfied: pillow in /Library/Python/2.7/site-packages (from image) (5.3.0)
Requirement already satisfied: pytz in /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python (from django->image) (2013.7)

更新点子？

pip install --upgrade pip
Requirement already up-to-date: pip in /Library/Python/2.7/site-packages/pip-18.1-py2.7.egg (18.1)

通过自制软件安装Python ist

通过sudo进行PIP： sudo pip install image

还尝试了：

easy_install pip
Password:
Searching for pip
Best match: pip 18.1
Processing pip-18.1-py2.7.egg
pip 18.1 is already the active version in easy-install.pth
Installing pip script to /usr/local/bin
Installing pip2.7 script to /usr/local/bin
Installing pip2 script to /usr/local/bin

Using /Library/Python/2.7/site-packages/pip-18.1-py2.7.egg
Processing dependencies for pip
Finished processing dependencies for pip

和：

brew unlink python && brew link python

更多信息：

File "/usr/local/lib/python3.7/site-packages/scrapy/pipelines/images.py", line 15, in <module>
    from PIL import Image
ModuleNotFoundError: No module named 'PIL'

MBP:bid user$ type python
python is hashed (/usr/local/opt/python/libexec/bin/python)

MBP:bid user$ /usr/local/opt/python/libexec/bin/pip show pip
Name: pip
Version: 18.1
Summary: The PyPA recommended tool for installing Python packages.
Home-page: https://pip.pypa.io/
Author: The pip developers
Author-email: pypa-dev@groups.google.com
License: MIT
Location: /usr/local/lib/python3.7/site-packages
Requires: 
Required-by: 

任何想法如何解决？

Answer 1

您要使用哪个版本的Python？ 您似乎声称您是通过自制软件安装的Python，但是您使用的是Apple在/usr/bin/python提供的Python 2.7，这就是为什么pip安装在/Library/Python/2.7 。

如果要使用自制 Python和pip ，则需要运行/usr/local/opt/python/libexec/bin/python 。 如果运行，则可以查看所有这些信息：

brew info python

通常，在/anywhere/LOCAL/anywhere中查找或安装的所有内容都是homebrew 。 任何使用/usr/bin或/Library/anywhere都将由Apple提供。

---

如果您想知道正在运行的实际命令，请使用如下type ：

type python
python is hashed (/usr/local/opt/python/libexec/bin/python)

所以这告诉我，在我的机器上， python是/usr/local/...的一个，它必须来自自制软件，因为它包含/.../LOCAL/...

您的python当前是/usr/bin/python 。 如果你想使用一个自制软件 ，你需要在你登录的个人资料更改PATH，把/usr/local/opt/python/libexec/bin 之前 /usr/bin 。 例如：

export PATH=/usr/local/opt/python/libexec/bin:$PATH

然后启动一个新的终端，以便您使用新的配置文件运行。

---

注意区别：

# Run the old Apple-supplied Python
/usr/bin/python -V
Python 2.7.10

# Run the shiny new homebrew Python
/usr/local/opt/python/libexec/bin/python -V
Python 3.7.1

# Run the homebrew pip - that installs into /something/LOCAL/something - sure sign it is not Apple's
/usr/local/opt/python/libexec/bin/pip show pip
Name: pip
Version: 18.1
Summary: The PyPA recommended tool for installing Python packages.
Home-page: https://pip.pypa.io/
Author: The pip developers
Author-email: pypa-dev@groups.google.com
License: MIT
Location: /usr/local/lib/python3.7/site-packages