pip 安装后没有名为 imutils.perspective 的模块

Question

我正在尝试按照本教程进行操作，该教程需要 imtools 。看起来我已经安装了这个包，但是 Python 编译器找不到它。这里发生了什么？

教程：http: //www.pyimagesearch.com/2016/10/03/bubble-sheet-multiple-choice-scanner-and-test-grader-using-omr-python-and-opencv/

 ~/py:. cat test_grader.py
from imutils.perspective import four_point_transform~

~/py:. python test_grader.py
Traceback (most recent call last):
  File "test_grader.py", line 1, in <module>
    from imutils.perspective import four_point_transform
ImportError: No module named imutils.perspective

~/py:pip install imtools
Requirement already satisfied: imtools in /usr/local/lib/python2.7/site-packages
Requirement already satisfied: matplotlib in /usr/local/lib/python2.7/site-packages (from imtools)
Requirement already satisfied: pyyaml in /usr/local/lib/python2.7/site-packages (from imtools)
Requirement already satisfied: numpy in /usr/local/lib/python2.7/site-packages (from imtools)
Requirement already satisfied: scipy in /usr/local/lib/python2.7/site-packages (from imtools)
Requirement already satisfied: python-dateutil in /usr/local/lib/python2.7/site-packages (from matplotlib->imtools)
Requirement already satisfied: pyparsing!=2.0.0,!=2.0.4,>=1.5.6 in /usr/local/lib/python2.7/site-packages (from matplotlib->imtools)
Requirement already satisfied: cycler in /usr/local/lib/python2.7/site-packages (from matplotlib->imtools)
Requirement already satisfied: pytz in /usr/local/lib/python2.7/site-packages (from matplotlib->imtools)
Requirement already satisfied: six>=1.5 in /usr/local/lib/python2.7/site-packages (from python-dateutil->matplotlib->imtools)
~/py:.

原文由 quantumpotato 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

好像你刚刚安装了错误的包。本教程说您需要 imutils，但您安装了 imtools。尝试安装 imutils：

 pip install --upgrade imutils

原文由 neverwalkaloner 发布，翻译遵循 CC BY-SA 3.0 许可协议

Answer 2

1）安装 imutils

 pip install imutils

2）如果imutils已经安装，检查安装路径。

 Requirement already satisfied: imutils in /usr/local/lib/python3.5/dist-packages

3）当我运行 python 程序时，我遇到了以下错误：

 ImportError: No module named imutils.video

在我的例子中，imutils 只安装在 /usr/local/lib/python3.5/dist-packages 路径下，一旦我将这个文件夹复制到 /usr/local/lib/python2.7/dist-packages ，它就起作用了！希望这会有所帮助。

原文由 henryoats 发布，翻译遵循 CC BY-SA 4.0 许可协议