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

size -- 这是可以从文件中读取的字节数。

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