read()方法读取文件size个字节大小。如果读取命中获得EOF大小字节之前，那么它只能读取可用的字节。
语法
以下是read()方法的语法：
fileObject.read( size );
参数
返回值
此方法返回读取字符串中的字节数。
例子
下面的例子显示了read()方法的使用。
#!/usr/bin/python
# Open a file
fo = open("foo.txt", "rw+")
print "Name of the file: ", fo.name
# Assuming file has following 5 lines
# This is 1st line
# This is 2nd line
# This is 3rd line
# This is 4th line
# This is 5th line
line = fo.read(10)
print "Read Line: %s" % (line)
# Close opend file
fo.close()
当我们运行上面的程序，它会产生以下结果：
Name of the file: foo.txt Read Line: This is 1s
原文：http://www.jb51.net/article/66629.htm