python 日记 day8 文件操作

文件操作：

　　1.文件路径

　　2.编码方式 :utf-8 ,gbk .........................

　　3.操作方式 :只读，只写，追加，读写，写读........................

只读：
绝对文件：
f = open('D:\zbiji123\python自学.txt',mode = 'r',encoding = 'utf-8')
print(f.read(10))    read 是按字符来读  
相对文件;
f = open('day-2\zuoye.py',mode = 'r',encoding = 'utf-8')
print(f.read())
byte 类型

f = open('day-2\zuoye.py',mode = 'rb')
print(f.read())

只写：
type 类型：
f = open('day-2\zuoye.py',mode = 'wb')
f.write('aaaaaaaaaaaaa'.encode('utf-8'))
f.close()

f = open('day-2\zuoye.py',mode = 'w',encoding='utf-8')
f.write('aaaaaaaaaaaaa')
f.close()

追加：
f = open('day-2\zuoye.py',mode = 'a',encoding='utf-8')
f.write('aaaaaaaaaaaaa')
f.close()

读写：
f = open('day-2\zuoye.py',mode = 'r+',encoding='utf-8')
content = f.read()
print(content)
f.write('ccc')
f.close()
type 类型
f = open('day-2\zuoye.py',mode = 'r+b')
content = f.read()
print(content)
f.write('ccc'.encode('utf-8'))
f.close()