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'''2020年03月25日 23:39:54这是给大家做的第二次python培训.上次给大家讲了怎样安装python解释器,以及怎样编写一个最简单的python hello world程序。这次主要讲python语法.'''# 内置数据类型# 整型age = 20print(age)print(type(age))print("小明今年:" + str(age) + "岁了")print('----------------------------------------')# 浮点数rate = 0.49print(rate)print(type(rate))print('----------------------------------------')# 字符串name = "python"print(name)print(type(name))print("人生苦短,我用" + name)print('----------------------------------------')# 列表fruits = ['苹果', '香蕉', '橘子', '西瓜']#print(fruits)#print(type(fruits))#print(fruits[0])#print(fruits[1])#print(fruits[1:])#print(fruits[:1])#print(fruits[-1:])#print(fruits[:-1])#print(fruits[:])#print(fruits[1:2])#fruits[0] = '梨子'#print(fruits)#print(fruits[:])#print('----------------------------------------')#fruits.append('火龙果')#print(fruits)#fruits.insert(0, '芒果')#print(fruits)#fruits.pop()#print(fruits)#fruits.reverse()#print(fruits)# 元组foods = ('拌面', '烤肉', '大盘鸡')print(foods)print(type(foods))print(foods[0])#foods[0] = '凉皮'print('----------------------------------------')# 字典profile = {}print(profile)print(type(profile))profile['name'] = 'chengwei'profile['email'] = 'chengwei@hmccb.com'profile['sex'] = 'man'print(profile)print(profile.keys())print(profile.values())print(profile['name'])for item in profile.keys():print('[{0}]-->[{1}]'.format(item, profile[item]))# 条件判断price = 100if price > 50:print("多了")else:print("不多")age = 30if age <=6:print("小朋友")elif age <= 18:print("青少年")else:print("成年人")# for循环foods = ['拌面', '烤肉', '大盘鸡']for item in foods:print(item)# for循环遍历range迭代器for i in range(10):print(i)# while循环while len(foods) > 0:print(foods[-1:])foods.pop()# while循环 模拟do-while 至少执行一次count = 0while True:print("hahaha")count += 1if count > 3:break#def func2(name):# print("语言:" + name)##if __name__ == '__main__':# func2("python")# #func1(host='localhost', port=3306, username='root', passwd='123456', db='test')#def func1(**kwargs):# print(kwargs)# print(type(kwargs))# for key in kwargs:# print('[%s]-->[%s]' % (key, kwargs[key]))##if __name__ == '__main__':# func1(host='localhost', port=3306, username='root', passwd='123456', db='test')import osos.chdir("D:\\")files = os.listdir('.')print(files)
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