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File "/home/mike/pilcrow-main/DefineSources.py", line 121, in initializePage
self.splitter.setSizes([width * 2/3, width * 1/3])
TypeError: index 0 has type 'float' but 'int' is expected
Fixed by adding int() typecasts as below:
self.splitter.setSizes([int(width * 2/3), int(width * 1/3)])