Is canning town safe?
If you’ve got a choice visit all the areas you can. I lived near Canning Town as a teacher for 3 years and never had a problem. It is not the prettiest place and is rough, but it’s interesting and the most multi-cultural place (according to languages spoken per sq km: 160 something as I recall) on Earth, so I’d advise you go for a walk around the place on a Saturday daytime and make your own mind up. Good luck!