Python 3.13.0 (tags/v3.13.0:60403a5, Oct 7 2024, 09:38:07) [MSC v.1941 64 bit (AMD64)] on win32 Type "copyright", "credits" or "license()" for more information. DreamPie 1.2.1 >>> xs = [ ... [-1, -1, -1], ... [-1, 9, -1], ... [-1, -1, -1], ... ] >>> xs 0: [[-1, -1, -1], [-1, 9, -1], [-1, -1, -1]] >>> type(xs) 1: <class 'list'> >>> xs[1] 2: [-1, 9, -1] >>> type(xs[1]) 3: <class 'list'> >>> xs[1][1] 4: 9 >>> xs[1, 1] Traceback (most recent call last): File "<pyshell#6>", line 1, in <module> xs[1, 1] ~~^^^^^^ TypeError: list indices must be integers or slices, not tuple >>> xs = 'ahoj' >>> ys = b'ahoj' >>> xs 5: 'ahoj' >>> ys 6: b'ahoj' >>> type(xs) 7: <class 'str'> >>> type(ys) 8: <class 'bytes'> >>> for x in xs: ... print(x) a h o j >>> for y in ys: ... print(y) 97 104 111 106 >>> chr(97) 9: 'a' >>> for x in b'ahoj\xff': ... print(x) 97 104 111 106 255 >>>