fileObject.read( size );

假设'foo.txt'文件包含以下文本：

This is 1st line
This is 2nd line
This is 3rd line
This is 4th line
This is 5th line

#!/usr/bin/python3

# 打开一个文件
fo = open("foo.txt", "r+")
print ("文件名为：", fo.name)

line = fo.read(10)
print ("读取的字符串为：%s" % (line))

# 关闭打开的文件
fo.close()

文件名为: foo.txt
读取的字符串为: This is 1s