Slice -list, string
1, the string, the end of the slice care regardless
s = "123455" print (s [0: 3]) Results: 123
2、list
d = [12,34,45] print (d [: 2]) Results: [12, 34]
3, step
= D [12,34,45,50,60] : Print (D [:: 2]) results [12, 45, 60] compartments takes a value of two
1, the string, the end of the slice care regardless
s = "123455" print (s [0: 3]) Results: 123
2、list
d = [12,34,45] print (d [: 2]) Results: [12, 34]
3, step
= D [12,34,45,50,60] : Print (D [:: 2]) results [12, 45, 60] compartments takes a value of two