Read and write Python files

#文件的打开
#file_object = open (file_name,access_mode= ' R ')
# file_name relative path or absolute path    Access_mode parameter is not added, then the default is R



# r Opens the file in order to read the file. File pointer at the beginning
Fh=open (' E:/gittest/test/abc.txt ')

Fh.tell ()     #文件对象的tell方法获取文件指针的位置
Fh.read (2)    #读取前两个字符.
Fh.read ()

Fh.seek (3)   #从开头指针移动3个位置后开始读取

Fh.close ()

STR1 = Fh.readline ()  #读取一行  contains newline characters

Str.readlines ()  #读取所有行包含换行符, return to list


#  W file exists, content is emptied. File does not exist, create a file
F=open (' tmp ', ' W ')
F.write (' ABCDE ')  #会先写入到缓冲区去, this time the view file is not written in
F.flush ()  #把缓冲区的内容写到磁盘上去


#为了在文件末尾追加内容而打开文件
F=open (' tmp ', ' a ')

#在python3下open函数可以通过encoding参数指定编码方式, but not in 2.
f = open (' Your_file.txt ', ' R ', encoding= ' utf-8 ')


#with Way to open the file, at the end of execution, the system automatically calls F.close ()
With open (' tmp ', ' R ') as  F:
   FC = F.read ()

#支持多个文件的打开
With open (Infilename) as IFile, open (Outfilename, ' W ') as Ofile:
   FC = Ifile.read ()
   Ofile.write (FC)

Read and write Python files