anaconda的python環境配置
關鍵字：anaconda opencv3 yum反悔
我在anaconda的python環境下嘗試運行catch_usb_video.py腳本（來源：http://www.cnblogs.com/neo-T/p/6426029.html），結果報以下錯誤：
OpenCV(3.4.1) Error: Unspecified error (The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Carbon support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script) in cvNamedWindow, file /opt/conda/conda-bld/opencv-suite_1527005194613/work/modules/highgui/src/window.cpp, line 618
Traceback (most recent call last):
File "catch_viedo.py", line 30, in <module>
CatchUsbVideo("截取視頻流", int(sys.argv[1]))
File "catch_viedo.py", line 6, in CatchUsbVideo
cv2.namedWindow(window_name)
cv2.error: OpenCV(3.4.1) /opt/conda/conda-bld/opencv-suite_1527005194613/work/modules/highgui/src/window.cpp:618: error: (-2) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Carbon support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function cvNamedWindow
按照網上搜索到的結果：
1-安裝libgnomeui-devel : yum install -y libgnomeui-devel
結果：這個其實只適用Ubuntu，隨即就被我刪除了，也正是因為這樣，我才學會yum是怎麽刪除包（反悔），且把該包一並下載安裝的依賴包都刪除，
顯示安裝那個包的歷史yum history list libgnomenui-devel
Loaded plugins: fastestmirror, langpacks
ID | Command line | Date and time | Action(s) | Altered
-------------------------------------------------------------------------------
4 | install libgnomeui-devel | 2018-07-19 20:59 | Install | 89
history list
然後 yum history undo 4，4是ID那一列
2-安裝gtk2-devel，結果還是沒解決，也是反悔安裝了
通過比較其他人在網上反饋的情況，我嘗試重裝opencv3，所以我執行了以下命令:
1.conda remove opencv
2.conda list | grep opencv 緊接著我又查了conda還包含哪些opencv包，不知道這兩個包有沒有影響，反正也刪除了，如果有人也有的話可以嘗試先不刪除，看看效果再決定（^_^留言告訴我結果）
libopencv 3.4.1 h1a3b859_1 defaults
py-opencv 3.4.1 py36h0676e08_1 defaults
3.conda remove libopencv py-opencv
4.conda install opencv3
至此，原來的py腳本運行一切正常。
anaconda的python環境配置