python - 如何在 Pandas 数据框的每一行的开头添加动态数量的空格？

Question

我如何在 df 的每一行左侧填充足够的空格以确保该行总计 30 个字符？

我尝试沿着这条路走下去，但它没有用，我相信 ljust 已被弃用:

'{: <30}'.format(df['test1'])

目前:

>>> df['test1']
0    1234jjjjjjjdddd
1    1234jjjjjjjdd
2    1234jjjjjjjddddddddd
3    1234jjjjjjjddd
4    1234jjjjjjjdddddd

我在找什么:

>>> df['test1']
0                   1234jjjjjjjdddd
1                     1234jjjjjjjdd
2              1234jjjjjjjddddddddd
3                    1234jjjjjjjddd
4                 1234jjjjjjjdddddd

最终解决方案:

df['test1'] = df.test1.str.rjust(30,' ') 

Answer 1

我想你可以使用 str.rjust :

print (df.test1.str.rjust(30, ' '))
0                   1234jjjjjjjdddd
1                     1234jjjjjjjdd
2              1234jjjjjjjddddddddd
3                    1234jjjjjjjddd
4                 1234jjjjjjjdddddd
Name: test1, dtype: object