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public text v1 · immutabledude:~/pysf ben$ cat test.py
a = [[1, 2], [3, 4]]
b = [a[0], a[1]]
c = a[0:1]
print b
print c
dude:~/pysf ben$ python test.py
[[1, 2], [3, 4]]
[[1, 2]]
dude:~/pysf ben$ cat test.py
a = [[1, 2], [3, 4]]
b = [a[0], a[1]]
c = a[0:1]
print b
print c
dude:~/pysf ben$ python test.py
[[1, 2], [3, 4]]
[[1, 2]]