Routine Source: North China University of Science and Technology Song-day teacher mooc "python programming language," the seventh unit <automatic locus drawing>. This error is looking for a long time, the Internet has given various reasons for this error, but I have and does not match. Micro letter asked the students to capture and data sent to him, a copy of the data behind a little empty, I suddenly realized that my data may be more than the end to play a blank line.
Here you can see the cursor, this obscure errors I actually find myself out, so happy. Delete blank lines to make the cursor go to the last 0 back just fine. Also note that the data in the comma "," going to split ( ",") are only comma comma, otherwise it will be an error. Warning is the data format must strictly correspond to and follow.
Attaching one program:
