On 2016-09-17 03:05, Peng Yu wrote: > Hi, > > I'm wondering where is the documentation for ',' as in the following usage. > > x = 1 > y = 2 > x, y = y, x > > I tried help(','). But there are too many ',' in it and I don't see in > which section ',' is documented. Could anybody let me know? Thanks. > Search for 'tuple' instead.