Pad string to the left of a character-CodePudding

I have a float that is stored as a string:

float1 = 638045.11 float2 = 638045.1

I want to print this:

float1 = 0000638045.11 float2 = 0000638045.1

I've tried zfill but that pads the entire string. How can I pad only to the left of the decimal?

CodePudding user response：

You can use str.split to spilt the string to the left and right parts then use zfill on the left part.

float1 = 638045.11 
float2 = 638045.1

sf11, sf12 = str(float1).split('.') # -> ['638045', '11']
sf21, sf22 = str(float2).split('.') # -> ['638045', '1']

print(f"{sf11.zfill(10)}.{sf12}")
print(f"{sf21.zfill(10)}.{sf22}")

Output:

0000638045.11
0000638045.1