前言
记性不好，把一些error记录一下，没准什么时候又遇到了。
IndentationError
记录时间：2017.08.10
错误提示：
IndentationError: unexpected indent错误原因：python对代码格式要求严格，很可能是因为代码格式错误导致问题，检查一下有没有注释符破坏代码格式
ImportError
记录时间：2017.08.07
错误描述：在安装人脸识别库face_recognition时，import错误
错误提示：
Traceback (most recent call last):
File "find_faces_in_picture.py", line 2, in <module>
import face_recognition
File "/usr/local/lib/python3.6/site-packages/face_recognition/__init__.py", line 7, in <module>
from .api import load_image_file, face_locations, face_landmarks, face_encodings, compare_faces, face_distance
File "/usr/local/lib/python3.6/site-packages/face_recognition/api.py", line 4, in <module>
import dlib
File "/usr/local/lib/python3.6/site-packages/dlib-19.4.99-py3.6-macosx-10.11-x86_64.egg/dlib/__init__.py", line 1, in <module>
from .dlib import *
ImportError: dlopen(/usr/local/lib/python3.6/site-packages/dlib-19.4.99-py3.6-macosx-10.11-x86_64.egg/dlib/dlib.so, 2): Symbol not found: _PyClass_Type
Referenced from: /usr/local/opt/boost-python/lib/libboost_python-mt.dylib
Expected in: flat namespace
in /usr/local/opt/boost-python/lib/libboost_python-mt.dylib解决办法：可能由于本机多版本的Python环境，使得安装的依赖boost-python为python2版本，改成python3版本就可以了，之后需要重新执行cmake，代码如下：
brew uninstall boost-python
brew install boost-python --with-python3 --without-python
git clone https://github.com/davisking/dlib.git
cd dlib
mkdir build; cd build; cmake .. -DDLIB_USE_CUDA=0 -DUSE_AVX_INSTRUCTIONS=1; cmake --build .
cd ..
python3 setup.py install --yes USE_AVX_INSTRUCTIONS --no DLIB_USE_CUDA
记录时间：2017.07.11
错误提示：
ImportError:
Importing the multiarray numpy extension module failed. Most
likely you are trying to import a failed build of numpy.
If you're working with a numpy git repo, try `git clean -xdf` (removes all
files not under version control). Otherwise reinstall numpy.
解决办法：因为多版本python影响numpy调用，pip uninstall numpy；pip install numpy之后就好了
