如何将名字列表右对齐

Question

我正在做一个程序，这个程序会让用户输入一串名字。在用户输入完这些名字后，我的程序需要把所有名字右对齐。到目前为止，我的进展是这样的：

names =[]

# User is prompted to enter a list of names
name = input ("Enter strings (end with DONE):\n")
while name != 'DONE':
    names.append(name) # This appends/adds the name(s) the user types in, to names
    name = input("")

print("\n""Right-aligned list:")
for name in names:
    maximum = max(names, key=len) #This line of code searches for the name which is the longest
    new_maximum = len(maximum) #Here it determines the length of the longest name
    diff = new_maximum - len(name) #This line of code is used to subtract the length of the longest name from the length of another different name
    title = diff*' ' #This code determines the open space (as the title) that has to be placed in front of the specific name
    print(title,name) 

这是没有注释的程序：

names =[]

name = input ("Enter strings (end with DONE):\n")
while name != 'DONE':
    names.append(name)
    name = input("")

print("\n""Right-aligned list:")
for name in names:
    maximum = max(names, key=len) 
    new_maximum = len(maximum) 
    diff = new_maximum - len(name)
    title = diff*' '
    print(title,name) 

我希望这个程序的输出是：

Enter strings (end with DONE):
Michael
James
Thabang
Kelly
Sam
Christopher
DONE

Right-aligned list:
    Michael
      James
    Thabang
      Kelly
        Sam
Christopher

但是我得到的是这个：

Enter strings (end with DONE):
Michael
James
Thabang
Kelly
Sam
Christopher
DONE

Right-aligned list:
     Michael
       James
     Thabang
       Kelly
         Sam
 Christopher

注意：当用户输入DONE时，程序会结束。

问题是，列表中的每个名字前面都多了一个空格。我该怎么做才能让名字右对齐，但又不出现多余的空格呢？

Answer 1

我知道这个问题已经很久了，但用一行代码就能解决：

print('\n'.join( [ name.rjust(len(max(names, key=len))) for name in names ] ))

这个关于列表推导的回答帮了我很多：如何对每个列表元素调用 int() 函数？

Answer 2

你可以这样使用字符串格式化：

a = ['a', 'b', 'cd', 'efg']

max_length = max(len(i) for i in a)

for item in a:
    print '{0:>{1}}'.format(item, max_length)

[OUTPUT]
  a
  b
 cd
efg