f=open(\'test\'.txt\',\'w\')//写入文件
f=open(\'test.txt\',\'a\')//追加写入文件
read()一次性读取
readline()读取一行
readlines()读取一行，并保留为一个list里面
seek(0)文件指针指向开头
tell()显示目前指针位置
os和stat模块获取文件：
stat：
import os
import stat
fileStats = os.stat ( \'test.txt\' )
fileMode = fileStats [ stat.ST_MODE ]
if stat.S_ISREG ( fileStats [ stat.ST_MODE ] ):
print \'Regular file.\'
elif stat.S_ISDIR ( fileStats [ stat.ST_MODE ] ):
print \'Directory.\'
elif stat.S_ISLNK ( fileStats [ stat.ST_MODE ] ):
print \'Shortcut.\'
elif stat.S_ISSOCK ( fileStats [ stat.ST_MODE ] ):
print \'Socket.\'
elif stat.S_ISFIFO ( fileStats [ stat.ST_MODE ] ):
print \'Named pipe.\'
elif stat.S_ISBLK ( fileStats [ stat.ST_MODE ] ):
print \'Block special device.\'
elif stat.S_ISCHR ( fileStats [ stat.ST_MODE ] ):
print \'Character special device.\'
os.path:
fileStats = \'test.txt\'
if os.path.isdir ( fileStats ):
print \'Directory.\'
elif os.path.isfile ( fileStats ):
print \'File.\'
elif os.path.islink ( fileStats ):
print \'Shortcut.\'
elif os.path.ismount ( fileStats ):
print \'Mount point.\'