python学习-字符串对其问题

[root@localhost /]# cat strduiqi.py
#!/bin/python
mydict={
'name':'zhuliguo',
'age':29,
'student':'student'
}
length=max(map(len,mydict.keys()))
for n in mydict:
    print(n.ljust(length),':',mydict[n])

[root@localhost /]#