没有找到PIL模块，但它已安装和up2date

Question

我试图在mac上下载带有scrapy的图像，并返回以下错误消息：

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pip？

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)

Python分期付款

通过sudo的PIP：sudo pip install image

也曾尝试过：

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

以及：

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: 

有什么办法解决这个问题吗？

Answer 1

您想使用哪种版本的Python？您似乎声称您是通过、自制安装的，但是您使用的是由苹果在/usr/bin/python中提供的Python2.7，这就是pip在/Library/Python/2.7中安装的原因。

如果要使用、自制、Python和pip，则需要运行/usr/local/opt/python/libexec/bin/python。如果运行以下命令，您可以看到所有这些信息：

brew info python

通常，在/anywhere/LOCAL/anywhere中或在其中安装的任何东西都将是自制。任何使用/usr/bin或/Library/anywhere的产品都将由苹果公司提供。

如果您想知道正在运行的实际命令，请使用type，如下所示：

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

这就告诉我，在我的机器上，python是/usr/local/...中的一个，它必须来自homebrew，因为它包含/.../LOCAL/...。

您的python当前是/usr/bin/python。如果您想使用自制 one，则需要更改登录配置文件中的路径，并将/usr/local/opt/python/libexec/bin 放在 /usr/bin之前。例如：

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

然后启动一个新的终端，以便使用新的配置文件运行。

请注意差异：

# 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