The dialog box opens when you attempt to open a file in the editor, but PyCharm does not recognize its type by the file extension. Use the dialog box to associate unknown file extensions with existing file types.
|Open matching files
|When this option is selected, PyCharm treats the type of the file to be opened as one of the recognized file types. Choose the relevant type from the list box below, that displays all the file types recognized by PyCharm.|
|File Pattern||In this text box, specify the file pattern to be associated with the selected file type. By default, the text box shows the following pattern: *.<current file full extension>.|
|Open matching files in associated application||When this option is selected, PyCharm attempts to open the selected file using its native application, if this application is available.|