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@@ -1,13 +0,0 @@
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c = [1,2,3,'1',True,2.1]
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# 变量[起始下标:结束下标]
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# 如果下标从0开始可以省略不写,例如 n = l[:4]
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# 如果结束下标取的是最后一个元素,可以省略不写,例如 n = l[3:]
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# 如果列表中的元素都要,开始和结束下标都可以省略,例如 n = l[:]
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# n = l[:-1] 表示从0开始 - 到数二个元素
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print(c[0:4])
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print(c[:4])
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print('-------------------------')
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print(c[0:])
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print('-------------------------')
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print(c[:7])
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print(c[:10])
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@@ -1,9 +0,0 @@
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l = [1,2,3,4,5,6,7,8,9]
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# list[start:stop:step]
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print(l[::2])
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print('-------------')
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print(l[::3])
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print('-------------')
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print(l[::4])
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print('-------------')
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@@ -1,9 +0,0 @@
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l = [1, 2,3,4,5,6,7,8,9]
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# list[start:stop:step]
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print(l[::-2])
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print('-------------')
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print(l[::-3])
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print('-------------')
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print(l[::-4])
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print('-------------')
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@@ -1,3 +0,0 @@
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b2 = [1,2,3]
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b1 = [4,5,6]
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print(b1+b2)
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