編寫不同長度的兩個列表的列數據文件

Question

我正在考慮這兩個名單： a = [2, 4, 7] b = [6, 9, 10, 90, 80]

我想寫這些列表的數據文件顯示列表的元素「A」的考慮到a和b的長度不相同，第二列中的'b'列和'b'。

Answer 1

差別小的變化，從@eumiro

with open("test.txt","w") as fin: 
    #izip_longest create consecutive tuples of elements from the list of iterables 
    #where if any of the iterable's length is less than the longest length of the 
    #iterable, fillvalue is taken as default 
    #If you need formatted output, you can use str.format 
    #The format specifier here used specifies the length of each column 
    #to be five and '^' indicates that the values would be center alligned 
    for e in izip_longest(a,b,fillvalue=''): 
     print >>fin,"{:^5} {:^5}".format(*e) 
     #if you are using Python 3.x 
     #fin.write("{:^5} {:^5}\n".format(*e)) 

Answer 2

import itertools as it 
import csv 

with open('output.csv', 'w') as f: 
    csvw = csv.writer(f) 
    for aa, bb in it.izip_longest(a, b): 
     csvw.writerow(aa, bb) 

或較短的版本由@katriealex啓發：

with open('output.csv', 'w') as f: 
    csv.writer(f).writerows(it.izip_longest(a, b))