python规范化字符串_如何规范化python中的字符串列表？

从您的输入数据开始：

>>> d = (

("row a", "a1","a2","a3"),

("another row", "b1"),

("c", "x", "y", "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']]

为了方便起见,这些步骤可以组合成一个功能：

def align(array):

col_size = {}

for row in array:

for i, col in enumerate(row):

col_size[i] = max(col_size.get(i, 0), 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