I'm having issues with PyCharm not having a good autocomplete for my imports. All my local packages are not recognized by PyCharm while typing. Pressing cmd+space once shows "No suggestions" and then pressing it again suddendly works and shows all available Imports.
Other option is to type out the full class name and then doing Alt + Enter and importing what you want.
I'm using PyCharm Professional 2018.2 but honestly this Problem has been ongoing and isn't that Version specific I think.
Here is a basic example of what I mean: https://gfycat.com/RectangularThisCutworm