03 2021 档案

摘要:循环字典的方法:mydict = {'a':1,'b':3}for key in mydict.keys(): print(key)for key in mydict.items(): print(key)for key in mydict: print(key,mydict[key]) 阅读全文
posted @ 2021-03-26 11:20 cmlaiweno 阅读(127) 评论(0) 推荐(0)
摘要:#coding:utf-8import osimport timenum=0while True: time.sleep(1) print(f"第{num}秒") num+=1 if num==5: os.system("start notepad") if num==10: os.system(" 阅读全文
posted @ 2021-03-18 11:13 cmlaiweno 阅读(58) 评论(0) 推荐(0)
摘要:#coding:utffor i in range(0,100,2): print(f"{i}")#for i in range(100) : 循环100次,i取0到99#for i in range(0,100,2) : 取值[0,98),每次步长为2#range(min,max,step) 不包 阅读全文
posted @ 2021-03-18 10:35 cmlaiweno 阅读(101) 评论(0) 推荐(0)
摘要:num1=3num2=3print(id(num1),id(num2))#变量赋值的是地址num1=10print(id(num1),id(num2)) 阅读全文
posted @ 2021-03-12 17:31 cmlaiweno 阅读(140) 评论(0) 推荐(0)
摘要:pycharm设置: 阅读全文
posted @ 2021-03-12 11:13 cmlaiweno 阅读(76) 评论(0) 推荐(0)