Pandas - Add leading “0” to string values so all values are equal len

Question

I have a column, code_x. I converted it to .astype(str). Some example values are 45362.0, 75345.0, 346157.0, 572575.0. I would like them a

Answer 1

IIUC, you can use str.zfill which means you wouldn't have to special-case by length:

In [16]: ser
Out[16]: 
0     45362
1     75345
2    346157
3    572575
dtype: float64

In [17]: ser.astype(str).str.zfill(8)
Out[17]: 
0    045362.0
1    075345.0
2    346157.0
3    572575.0
dtype: object