ImportError: No module named 'bottle' - PyCharm

in your PyCharm project:

• press Ctrl+Alt+s to open the settings
• on the left column, select Project Interpreter
• on the top right there is a list of python binaries found on your system, pick the right one
• eventually click the + button to install additional python modules
• validate

In some cases no "No module ..." can appear even on local files. In such cases you just need to mark appropriate directories as "source directories":

The settings are changed for PyCharm 5+.

• Go to File > Default Settings
• In left sidebar, click Default Project > Project Interpreter
• At bottom of window, click + to install or - to uninstall.
• If we click +, a new window opens where we can decrease the results by entering the package name/keyword.
• Install the package.

• Go to File > Invalidate caches/restart and click Invalidate and Restart to apply changes and restart PyCharm.

  Settings

  Install package