Incase if you are experiencing following error while using Anaconda / Orange 2.7 while checking tutorials,..
KeyError Traceback (most recent call last): File "C:\Python27\lib\site-packages\Orange\OrangeWidgets\OWWidget.py", line 178, in reportAndFinish self.sendReport() File "C:\Python27\lib\site-packages\Orange\OrangeWidgets\Data\OWDataTable.py", line 520, in sendReport table = self.id2table[id] KeyError: None
Solution : Kindly first select “File” first. This error because there is no file exists to generate a report. First time when you open tutorials, Orange asks you to download packages. These contain sample datasets to try. If you have downloaded them, you would see as below.
Simply select it then, a pop window open showing a list of sample data sets. Good Luck. Cheers !