python - 如何右对齐姓名列表

Question

我一直在开发一个程序，要求用户输入名称列表。他们输入这些名称后，我的程序必须右对齐所有这些名称。这是我到目前为止所拥有的:

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) 

这是没有所有注释的程序:

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) 

我想要这个程序的输出是:

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

Right-aligned list:
    Michael
      James
    Thabang
      Kelly
        Sam
Christopher

相反，这就是我得到的:

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，提示就会结束。

问题是列表中的每个名称都会打印一个额外的空格。如何打印它右对齐但没有多余的空格？

Answer 1

您可以按如下方式使用字符串格式:

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