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  • python 日常一记 基础

    # 添加字典

    # d = {
    #
    # 95: 'Adam',
    #
    # 85: 'Lisa',
    #
    # 59: 'Bart'
    #
    # }
    # # d[55]='jack'
    # print (d[95])

    # 获取key 合值
    # d = {
    # 'Adam': 95,
    # 'Lisa': 85,
    # 'Bart': 59
    # }
    # for key in d:
    # print (key+ ':',d[key])
    # 判断是否存在
    # s = set(['Adam', 'Lisa', 'Bart', 'Paul'])
    # x='jack'
    # if x in s :
    # print('测试')
    # else:
    # print('错误')
    # 显示变量和值

    # s = set([('Adam', 95), ('Lisa', 85), ('Bart', 59)])
    # for x in s:
    # print (x[0],':',x[1])
    # # print (x)
    # 对比set进行访问
    # s = set(['Adam', 'Lisa', 'Paul'])
    # L = ['Adam', 'Lisa', 'Bart', 'Paul']
    # for a in L:
    # if a in s:
    # s.remove(a)
    # else:
    # s.add(a)
    # print (s)
    # 添加列表
    # L = ['Adam', 'Lisa', 'Bart']
    # print(L[1])
    # # L.append('JACK')
    # L.insert(1,'JACK')
    # print (L)
    # # 替换列表
    # L = ['Adam', 'Lisa', 'Bart']
    # L[1]='JACK'
    # print (L)
    # 添加字典
    # d = {
    # 'Adam': 95,
    # 'Lisa': 85,
    # 'Bart': 59
    # }
    # d.update({'jack':75})
    # print(d)
    d = {
    'Adam': 95,
    'Lisa': 85,
    'Bart': 59
    }
    # print (d.get('Adam'))
    # b=(d.get('Lsa'))
    # print(b)
    # print(b)
    a='Adam'or 'Bart'
    # if 'Bart' in d:
    # if a in d:
    if a in d:
    # print (d['Bart'])
    print (a,':',d[a])
    else:
    print ('Error')
    # 两个列表长度对比
    # s = ['Adam', 'Lisa', 'Paul']
    # L = ['Adam', 'Lisa', 'Bart']
    # a=len(s)
    # b=len(L)
    # print (a,b)
    # # for a in L:
    # if a == b:
    # print ('pass')
    # else:
    # print('error')
    # 去重
    # 方法1
    # a = ['Adam', 'Lisa', 'Paul','Adam','Adam','Lisa']
    # b=[]
    # for x in a:
    # if x not in b:
    # b.append(x)
    # print (b)
    # 方法2
    # a = ['Adam', 'Lisa', 'Paul','Adam','Adam','Lisa']
    # a=list(set(a))
    # print(a)
    # 判断x是否在a列表中
    # a=['Paul', 'Lisa', 'Adam']
    # x='Adam' and 'Lisa' and 'Paul'
    # if x in a:
    # print ('PASS')
    # else:
    # print ('error')
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  • 原文地址:https://www.cnblogs.com/mahaining/p/9434218.html
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