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