摘要:
1.random模块 import random number = random.randint(1,10) #整数 f = random.uniform(1,100)#随机的小数 # print(round(f,2)) l = [1,2,3,4,23,23,52,32,632,362,362,36 阅读全文
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1.len #方法返回对象(字符、列表、元组等)长度或元素个数 score = [1,2,2323,4,5] name = ["xiaohei",'xiaobai','xiaolan'] d = {} for index in range(len(name)): # 0 1 2 key = name 阅读全文
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1.匿名函数 cc = lambda a,b:a+b #匿名函数,冒号前面是入参,冒号后面是返回值 print(cc(1,2)) 2.多维数组排序 sorted 对三名学生的成绩进行降序排序 d = {"wsc":100,"chuxu":101,"chj":99} #学生成绩 #print(d.it 阅读全文
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1.拆包 def func(): return 1,2,3,4 result = func() print(result) n1,n2,n3,n4 = func() #拆包 print(n1)print(n2)print(n3)print(n4) 2.浅拷贝 import copy li = [1, 阅读全文
摘要:
with 自动管理上下文数据库连接多线程 #写文件的函数 filename,content #写文件的函数 filename,content def write_file(filename:str,content:str,type:int=1): with open(filename,'w') as 阅读全文