file.readlines([sizehint])
描述 (Description)
方法readlines()使用readlines()读取EOF，并返回包含行的列表。 如果存在可选的sizehint参数，则不会读取到EOF，而是读取总计近似sizehint字节的整行（可能在四舍五入到内部缓冲区大小之后）。
仅在立即遇到EOF时才返回空字符串。
语法 (Syntax)
以下是readlines()方法的语法 -
fileObject.readlines( sizehint );
参数 (Parameters)
sizehint - 这是从文件中读取的字节数。
返回值 (Return Value)
此方法返回包含行的列表。
例子 (Example)
以下示例显示了readlines（）方法的用法。
This is 1st line
This is 2nd line
This is 3rd line
This is 4th line
This is 5th line
#!/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.readlines()
print "Read Line: %s" % (line)
line = fo.readlines(2)
print "Read Line: %s" % (line)
# Close opend file
fo.close()
当我们运行上面的程序时，它产生以下结果 -
Name of the file: foo.txt
Read Line: ['Python is a great language.\n', 'Yeah its great!!\n']
Read Line: []
