def fun(list):
all=0
ave=0
max=0
min=-1
n=0
for i in list:
all+=i
ave+=1
if(min>i or min==-1):
min=i
if(max<i):
max=i
ave=all/ave
for j in list:
n+=1
std=(i-ave)**2
std=round((std/(n-1))**0.5,2)
return {'最大值':max,'最小值':min,'平均值':ave,'样本标准方差':std}
list=[1,3,5,6]
print(fun(list))
2）输入一串字符作为密码，密码只能由数字与字母组成。编写一个函数judge(password)，用来求出密码的强度level，根据输入，输出对应密码强度。密码强度判断准则如下（满足其中一条，密码强度增加一级）：①有数字；②有大写字母；③有小写字母；④位数不少于8位。
def judge(password):
all=0
flag=0
a=0
b=0
c=0
d=0
for i in password:
all+=1
if(i.isdigit() and a==0):
flag+=1
a=1
if(i.islower() and b==0):
flag+=1
b=1
if(i.isupper() and c==0):
flag+=1
c=1
if(all>=8 and d==0):
flag+=1
d=1
print(all)
return flag
password='123asdASD'
print(judge(password))
3）新建一个文本文件zen.txt，文件内容为”Python之禅”的部分内容，具体如下：
Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
编写程序统计该文件内容的行数及单词的个数。
file=open("zen.txt","w+",encoding='utf-8')
file.write("Beautiful is better than ugly.\nExplicit is better than implicit."
"\nSimple is better than complex.\nComplex is better than complicated.")
file.close()
file=open("zen.txt","r+",encoding='utf-8')
hang=0
word=0
for i in file.readlines():
hang+=1
ls=i.split(" ")
word+=len(ls)
print(i)
print(word)
print(hang)
4）新建一个文本文件score.csv，用来保存3名考生3门课程的成绩，内容如下：
考号,程序设计,高数,马哲
10153450101,72,96,88
10153450101,68,88,73
10153450101,95,64,65
以上各数据均使用英文逗号分隔。请编写程序读取该文件内容，并统计每门课程的平均分、最高分和最低分。
import csv
fileHeader=["考号","程序设计","高数","马哲"]
d1=[10153450101,72,96,88]
d2=[10153450101,68,88,73]
d3=[10153450101,95,64,65]
csvFile = open("score.csv", "w",encoding='utf-8-sig')
writer = csv.writer(csvFile)
r1=(d1[1]+d2[1]+d3[1])/3
print('程序设计 %.2f'%r1)
r2=(d1[2]+d2[2]+d3[2])/3
print('高数 %.2f'%r2)
r3=(d1[3]+d2[3]+d3[3])/3
print('马哲 %.2f'%r3)
d4=['平均分',r1,r2,r3]
writer.writerows([fileHeader,d1,d2,d3,d4])
csvFile.close()
Original: https://blog.csdn.net/GeQ2019/article/details/120962448
Author: GeQ2019
Title: Python实验三函数与文件操作
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