随笔分类 - python
摘要：1、 >>> a = ["aaa","bbb","aaa","aaa","bbb","aaa","ccc","ddd","ddd"] >>> b = [] >>> for i in a: if i not in b: b.append(i) >>> b ## for循环去重复 ['aaa', 'bb
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摘要：1、 >>> a = ["aaa","bbb","ccc","ddd"] >>> b = ["ccc","ddd","eee","fff"] >>> c = [] >>> for i in a: if i not in b: c.append(i) >>> c ['aaa', 'bbb'] >>>
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摘要：1、 >>> a = ["aaa","bbb","ccc","ddd"] >>> b = ["ccc","ddd","eee","fff"] >>> c = a + b >>> c ['aaa', 'bbb', 'ccc', 'ddd', 'ccc', 'ddd', &#
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摘要：>>> a = ["aa","bb","aa","cc","aa","dd","bb","aa","cc"] >>> a ['aa', 'bb', 'aa', 'cc', 'aa', 'dd', 'bb', 'aa', 'cc'] >
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摘要：>>> sum = 0 >>> for i in range(1,101): ## 利用for循环 sum += i >>> print(sum) 5050 >>> del sum >>> sum(list(range(1,101))) ## 利用sum函数 5050 >>> sum = 0 >>>
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摘要：1、 >>> a = [20,10,50,40,30] >>> max = a[0] >>> for i in a: if i > max: max = i >>> print(max) 50 >>> min = a[0] >>> for i in a: if i < min: min = i >>
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摘要：1、 >>> a = ["cc","aa","bb","cc","aa","dd","aa","cc","ee","dd"] >>> sorted(set(a)) ['aa', 'bb', 'cc', 'dd', 'ee'] >>> b = sorted(set(a
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摘要：1、 >>> a = [34,28,187,22,128] >>> max = a[0] >>> for i in a: ## 求最大值 if i > max: max = i >>> print(max) 187 >>> min = a[0] >>> for i in a: ## 求最小值 if
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摘要：>>> a = ["aa","aa","bb","cc","bb","aa","dd","cc","aa","aa","aa"] >>> a ['aa', 'aa', 'bb', 'cc', 'bb', 'aa', 'dd', &#
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摘要：1、 >>> a = [] >>> b = ["aa","bb","cc"] >>> if len(a) == 0: print("empty!") empty! >>> if len(b) == 0: print("empty!") 2、 >>> a = ["aa","bb","cc","dd"]
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摘要：>>> import random >>> random.randint(1,10) ## 随机抽取1-10的数字 1 >>> random.randint(1,10) 4 >>> random.randint(1,10) 9 >>> random.randint(1,100) 67 >>> ran
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摘要：>>> a = ["aa","bb","cc","aa","dd","ee","aa","aa","ff","aa"] >>> a ['aa', 'bb', 'cc', 'aa', 'dd', 'ee', 'aa', 'aa',
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摘要：>>> a = ["aa","bb","cc","dd","ee"] >>> a ['aa', 'bb', 'cc', 'dd', 'ee'] >>> "aa" in a True >>> "dd" in a True >>> "aa" not in a False &
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摘要：1、 >>> a = ["aa","bb","cc","dd","ee"] >>> temp = a[1] ## 引入变量 >>> temp 'bb' >>> a[1] = a[3] >>> a ['aa', 'dd', 'cc', 'dd', 'ee'] >>> a[3] = temp >
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摘要：>>> a = ["ee","cc","aa","ff","aa","cc","dd","ee","dd","ee","aa","aa","bb"] ##生成列表 >>> a ['ee', 'cc', 'aa', 'ff', 'aa
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摘要：1、 >>> a = ["aa","cc","aa","bb","bb","aa","dd","ee"] >>> a ['aa', 'cc', 'aa', 'bb', 'bb', 'aa', 'dd', 'ee'] >>> "aa" in
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摘要：>>> a = ["dd","cc","aa","bb"] >>> a ['dd', 'cc', 'aa', 'bb'] >>> b = sorted(a) ## 排序并赋值给b >>> b ['aa', 'bb', 'cc', 'dd'] >>> a ['dd', 'cc&#
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摘要：>>> a = ["aa","bb","cc","dd","ee","ff","gg","hh"] >>> a ['aa', 'bb', 'cc', 'dd', 'ee', 'ff', 'gg', 'hh'] >>> a.pop() ## pop删除
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摘要：>>> a = ["aa","bb","cc"] ## 创建列表 >>> a ['aa', 'bb', 'cc'] >>> a.append("dd") ## append添加 >>> a ['aa', 'bb', 'cc', 'dd'] >>> a.extend(["ee"]) >>
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摘要：1、 >>> a = list(range(1,11)) ## 生成列表 >>> a [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] >>> a[::-1] ## 倒序排列 [10, 9, 8, 7, 6, 5, 4, 3, 2, 1] >>> a [1, 2, 3, 4, 5, 6
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