Why does it keep saying ImportError: No module named pydot when I have already installed the module through pip?

Question

我使用命令 pip install pydot 安装模块 pydot 但每当我尝试通过终端运行某个文件时它会提示以下错误。

Traceback (most recent call last):
  File "src/parser.py", line 3, in <module>
    import pydot
ImportError: No module named pydot

我进行了无休止的检查以确保它已正确安装。我确实在 python 文件夹中检查过它，确实存在。

有人知道我错过了什么吗？它的安装方式有问题吗？

我使用的是 macOS。

非常感谢！

Answer 1

首先，检查模块的安装位置（在控制台中键入以下内容）：

pip show numpy

这returns以下对我来说（Macbook）：

Name: numpy
Version: 1.14.0
Summary: NumPy: array processing for numbers, strings, records, and objects.
Home-page: http://www.numpy.org
Author: NumPy Developers
Author-email: numpy-discussion@python.org
License: BSD
Location: /Users/lab/miniconda2/lib/python2.7/site-packages
Requires:
Required-by: tensorly, tensorflow, tensorflow-tensorboard, scipy, patsy, pandas, nitime, nipype, mxnet, matplotlib, Keras, h5py

您可以看到位置字段：

Location: /Users/lab/miniconda2/lib/python2.7/site-packages

这意味着要使其运行正确，我需要使用：

python2 myscript.py

如果你想使用python 3.然后使用

pip3 install pydot

然后

python3 myscript.py

Why does it keep saying ImportError: No module named pydot when I have already installed the module through pip?

Why does it keep saying ImportError: No module named pydot when I have already installed the module through pip?

python

python-3.x

pip

pydot