python基础08
python基础09
1.文件操作。
模特主妇护士老师.txt
1.文件路径：d:\模特主妇护士老师.txt
2.编码方式：utf-8 gbk
3.操作方式：只读 ，只写 ，追加 ，读写 ，写读
以什么编码方式储存的文件，就以什么编码打开进行操作。
f = open('d:\模特主妇护士班主任.txt',mode = 'r' , encoding = 'utf-8')
content = f.read()
print(content)
f.close()
f = open('模特主妇护士班主任',mode = 'r',encoding='utf-8')
content = f.read()
print(content)
f.close()
#绝对路径 读取文件的编码不一致
f = open('d:\模特主妇护士班主任.txt',mode = 'r',encoding='utf-8')
content = f.read()
print(content)
f.close()
f = open('模特主妇护士班主任',mode = 'rb',)
content = f.read()
print(content)
f.close()
f = open('模特主妇护士班主任',mode = 'r',encoding = 'utf-8')
content = f.read()
print(content,type(content))
f.close()
#bytes-------->str
f = open('模特主妇护士班主任',mode = 'r',encoding = 'utf-8')
content = f.read()
print(content,type(content))
f.close()
#对于w:没有此文件就会创建文件
f = open('log',mode='w',encoding='utf-8')
f.write('骑兵步兵')
f.close()
#先将源文件的内容全部清除，在写
f = open('log',mode = 'w',encoding='utf-8')
f.write('附近看到类似纠纷')
f.close()
f = open('log',mode='wb')
f.write('附近看到类似纠纷'，encode('utf-8'))
f.close()
f = open('log',mode='wb')
f.write('附近看到类似纠纷',encode('gbk'))
f.close()
f = open('log',mode='wb')
f.write('附近看到类似纠纷'，encode('utf-8'))
f.close()
只写：w
wb
#先将源文件的内容全部清除，在写
# f = open('log',mode='w',encoding='utf-8')
# f.write('附近看到类似纠纷')
#f.close()
f = open('log',mode='wb')
f.write('附近看到类似纠纷'，encode('utf-8'))
f.close()
只读：r
rb
f = open('模特主妇护士班主任',mode='r',encoding='utf-8')
content = f.read()
print(content,type(content))
f.close()
#f = open('模特主妇护士班主任',mode='rb')
#content = f.read()
#print(content)
#f.close()
f = open('log',mode='a',encoding='utf-8')
f.write('佳琪')
f.close()
#bytes-------->str
f = open('log',mode='r',encoding='utf-8')
f.write('aaa')
print(f.read())
f.close()
#对于w,没有此文件就会创建文件
f = open('log',mode='r+b',encoding='utf-8')
print(f.read())
f.write('大猛，小孟',encode('utf-8'))
f.close()
f = open('log',mode='r+b')
print(f.read())
f.write('大猛,小孟',encode(utf-8))
f.close()
f = open('log',mode='w+',encoding='utf-8')
f.write('aaa')
print(f.read())
f.close()
f = open('log',mod='a+',encoding='utf-8')
f.write('佳琪')
print(f.read())
f.close()
f = open('log',mode='a',encoding='utf-8')
f.write()
f.read()
f.close()
f = open('log',mode = 'a',encoding='utf-8')
f.write('佳琪')
f.seek(0)
print(f.read())
f.close()
#功能详解
f = open('log',mode='r+',encoding='utf-8')
content = f.read(3)
print(content)
f.close()
f = open('log',mode='r+',encoding='utf-8')
content = f.read(3)#读出来的都是字符
print(content)
f.close()
#功能详解
f = open('log',mode='r+',encoding='utf-8')
#content = f.read(3) #读出来的都是字符
f.seek(3)
content = f.read()
print(content)
f.close()
#功能详解
f = open('log',mode='r+',encoding='utf-8')
#content = f.read(3) #读出来的都是字符
f.seek(3) #是按照字节定光标的位置
content = f.read()
print(content)
f.close()
f = open('log',mode='r+',encoding='utf-8')
#content = f.read(3) #读出来的都是字符
f.seek(3)
print(f.tell())
f.close()
#功能详解
f = open('log',mode='r+',encoding='utf-8')
f.seek(3)
print(f.tell())f.close()
f = open('log',mode='a+',encoding='utf-8')
f.write('佳琪')
print(f.read())
f.close()
f = open('log',mode = 'a+',encoding='utf-8')
f.write('佳琪')
count = f.tell()
f.seek(count=9)
print(f.read())
f.close()
line = f.readline()
print(line)
f.close()
line = f.readline() #一行一行的读
print(line)
f.close()
line = f.readline() #每一行当成列表中的每一个元素，添加到list中
print（line）
f.close()
li = f.truncate()
print(li)
f.close()
for line in f:
print(line)
f.close()
with open('log',mode='r',encoding='utf-8') as obj:
#obj read()
print(obj.read())
with open('log',mode='r+',encoding='utf-8') as obj:
#obj.read()
print(obj.read())
with open('log',mode='r+',encoding='utf-8') as f,\
open('log',mode='w+',encoding='utf-8') as f1:
#obj.read()
print(obj.read())
username = input('请输入你要注册的用户名：')
password = input('请输人你要注册的密码：')
with open('list_of_info',mode='w',encoding='utf-8') as f:
f.write('{}\n{}'.format(username,password))
print('恭喜您，注册成功')
lis = []
i = 0
while i < 3:
usn = input('请输入你的用户名：')
pwd = input('请输入你的密码：')
with open('list_of_info',mode='r+',encoding='utf-8') as f1:
for line in f1:
lis.append(line)
if usn == lis[0].strip() and pwd == lis[1].strip()
print('登录成功')
break
else:print('账号和密码错误')
i += 1
