这种方法读取直到EOF的使用readline()返回一个列表，其中包含的行。如果可选sizehint参数是存在的，而不是读取到EOF，全行共约sizehint字节读取(可能后四舍五入到内部缓冲区的大小).
语法:
fileObject.readlines( sizehint );
参数:
以下是详细的参数:
sizehint: 这是从文件中读取的字节数.
实例:
#!/usr/无聊的画板/python
# Open a file
fo = open("foo.txt", "r")
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()
这将产生以下结果:
Name of the file: foo.txt
Read Line: ['This is 1st linen', 'This is 2nd linen',
'This is 3rd linen', 'This is 4th linen',
'This is 5th linen']
Read Line: []