day08 学习小测试
1.1需求：读取一个100G的文件，检测文件中是否有关键字keys=['苍老师','小泽老师',"alex"],
如果有则替换成"***",并写入到另一个文件中
#19 需求：读取一个100G的文件，检测文件中是否有关键字keys=['苍老师','小泽老师',"alex"],
# 如果有则替换成"***",并写入到另一个文件中
f1=open("a1.txt",mode="r",encoding="utf-8")
f2=open("a2.txt",mode="w",encoding="utf-8")
keys=['苍老师','小泽老师',"alex"]
data=f1.readline()
while data:
for ele in keys:
if ele in data:
data=data.replace(ele,"***")
f2.write(data)
data=f1.readline()
f1.close()
f2.close()
#——————————————————————————————————————————————————————————————————————
#优化
keys=['苍老师','小泽老师',"alex"]
with open("a1.txt",mode="r",encoding="utf-8") as f1,open ("a2.txt",mode="w",encoding="utf-8")as f2:
data = f1.readline()
while data:
for ele in keys:
if ele in data:
data=data.replace(ele,"***")
f2.write(data)
data = f1.readline()
2：车牌区域划分，请根据车牌信息，分析出各省的车牌持有数量
#20：车牌区域划分，请根据车牌信息，分析出各省的车牌持有数量
#优化：
cars=['鲁A32444','鲁B12333','京B8989M','黑c49678','黑c46555','沪B25041','黑c34567']
info={}
ul=[]
for title in cars:
title=title[:1]
if title in info:
pass
info[title]=0
for ele in cars:
ele=ele[:1]
if ele in info:
info[ele]+=1
print(info)
#————————————————————————————————————————————————————————————————
3：读取文件内容，文件结构构造如下
#21：读取文件内容，文件结构构造如下
# id,name,age,phone,job
# 1,alex,22,136277444892,IT
# 2,wusir,23,133747474774,Teacher
# 3,taibai,18,1377747474,IT
#info=[{'id':"1","name":"alex","age":"22","phone":"136737899","Job":"IT"},{......}]
f1=open('data.txt',mode="r",encoding="utf-8")
title=f1.readline()
info=[]
title=title.strip().split(',')
data=f1.readline()
while data:
dict1={}
item=data.strip()
con=item.split(',')
for index in range(len(title)):
dict1[title[index]]=con[index]
info.append(dict1)
data = f1.readline()
f1.close()
print(info)
#——————————————————————————————————————————————————————————————————
4.九九乘法表
#22 九九乘法表
for num in range(1,10):
for num1 in range(1,num+1):
temp="%s*%s "%(num,num1)
print(temp,end='')
print()
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