Python numeric string to obtain a fixed length value, and fill 0 on the left if not enough

Python zfill() Method returns a string of the specified length , Align the original string to the right , Fill in the front 0

** Grammar format ：**str.zfill(width),width Specifies the length of the string

stk_code = 1
stk_code = str(stk_code).zfill(6)
print(stk_code )
Output results ：000001

Reference resources ：https://blog.csdn.net/sinat_37281674/article/details/119348635