So I'm learning Python in a Coursera Google course, which provides instructional code inside a Jupyter notebook page. But in addition to the Jupyter page, I primarily use the IDLE Shell and scratchpad (downloaded from Python.org) as my main IDE to run programs. The output is generally identical when copy/pasting code between these two environments. But this one code chunk produces different output between the two environments. In the Jupyter it provides all the pairings, line-by-line, all the way down. But the IDLE Shell does not print out anything; its totally blank, despite being a precise copy/paste. I can't make sense of these different results. I have really tried to make sure there was no typo anywhere. Any ideas? Thanks dominoes = [] for left in range(7): for right in range(left, 7): dominoes.append((left, right)) dominoes Continue reading...