Python w.pdf
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2023-06-27
20:07:01
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for i in range(3):
a=input()
b=input()
if a=='Kate' and b=='666666':
print("登陆成功")
break
else:
print("3 次用户名或者密码均有误！退出程序")
n 阶乘累加求和
def sun(n):
j=1
for i in range(1,n+1):
j*=i
return j
n=int(input())
s=1
for k in range(2,n+1):
s+=sun(k)
print(s)
字典翻转
try:
d=dict(eval(input()))
a=dict()
for keys,values in d.items():
a[values]=keys
print(a)
except:
print("输入错误")
分析文件字符分布，每个字符数量
txt=open("D:\2023.05.10\data.txt","r").read()
counts={}
for zimu in txt:
counts[zimu]=counts.get(zimu,0)+1
ls=list(counts.items())
ls.sort()
for k,c in ls:
print("{}:{}".format(k,c))
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