python入门 读写文件

1.打开文件，读取所有内容

file_object = open('thefile.txt')
try:
     all_the_text = file_object.read( )
finally:
     file_object.close( )

 

2.读取固定字节

file_object = open('abinfile', 'rb')
try:
    while True:
         chunk = file_object.read(100)
        if not chunk:
            break
         do_something_with(chunk)
finally:
     file_object.close( )

 

3.读取文件一行

f = open("D:\\test\\BlueSoftSetup.log","r")

try:

    while True:

        line = f.readline()

        if line:

            print(line)

        else:

            break;

finally:

 

    f.close();

 

4.写文件

写文本文件
output = open('data', 'w')
 

写二进制文件
output = open('data', 'wb')
 

追加写文件
output = open('data', 'w+')
 

写数据
file_object = open('thefile.txt', 'w')
file_object.write(all_the_text)
file_object.close( )