Detailed map traversal, teach you to master the complex gremlin query debugging method>>> 
1. If pandas library has not been installed from, under Windows system, use terminal CMD – > CD, enter the application with PIP installation, and run PIP install panda to install. The PIP version here should be the same as the pychar compiler version
After installation, you can use the panda library
2. If it has been installed before, no module named pandas will appear in the project, and the project structure will add the site packages directory
E:\Python27\python-3.7.2\Lib\site-packages
(1) . select File – > settings—> project:pythonWork —> project structure
(2) . select add content root on the right
(3) . select the folder (site packages folder under project interpreter)
(4)、mark as: sources
(5)、apply
Click OK to solve the problem
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