概述
我想规范化这一点,实际上使每行具有相同数量的列,并且数据中的每列具有相同的宽度,必要时用空格填充.例如,给出以下输入：
(
("row a","a1","a2","a3"),("another row","b1"),("c","x","y","a long string")
)我想要的数据如下所示：
(
("row a ","a3 "),"b1"," "," "),("c ","x ","y ","a long string")
)python 2.6或更高版本的pythonic解决方案是什么？只是为了清楚：我不想打印列表本身,我正在寻找一个解决方案,返回一个新的列表(或元组元组)与填充的值.
>>> d = (
("row a","a long string")
)进行一次通过以确定每列的最大大小：
>>> col_size = {}
>>> for row in d:
for i,col in enumerate(row):
col_size[i] = max(col_size.get(i,0),len(col))
>>> ncols = len(col_size)然后进行第二遍,将每列填充到所需的宽度：
>>> result = []
>>> for row in d:
row = list(row) + [''] * (ncols - len(row))
for i,col in enumerate(row):
row[i] = col.ljust(col_size[i])
result.append(row)这给出了期望的结果：
>>> from pprint import pprint >>> pprint(result) [['row a ','a1','a2','a3 '],['another row','b1',' ',' '],['c ','x ','y ','a long string']]
def align(array):
col_size = {}
for row in array:
for i,len(col))
ncols = len(col_size)
result = []
for row in array:
row = list(row) + [''] * (ncols - len(row))
for i,col in enumerate(row):
row[i] = col.ljust(col_size[i])
result.append(row)
return result总结
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