在esp-idf目录执行 ./install.sh 时出现以下报错：
Collecting MarkupSafe>=0.23
Using cached MarkupSafe-1.1.1-cp27-cp27m-macosx_10_6_intel.whl (17 kB)
ERROR: Could not find a version that satisfies the requirement bidict>=0.21.0 (from python-socketio>=1.6.1->Flask-SocketIO<3.0,>=2.9->gdbgui==0.13.2.0->-r /Users ...