Need Regex to validate Numeric values and empty spaces

I am using the below regex pattern to validate numerics and spaces

 "^[0-9\s]{1,50}" 

Attaching sample payload which i am receiving

 {"numberval":""}
 {"numberval":" "}
 {"numberval":"10,11,12"}

I am using python re module and compile method to validate the regex.
can any one help me with regex which can validate both the inputs?

>Solution :

Assuming you consider valid whitespace only or comma separated numbers, you could use this regex pattern:

^(?:\s*|\d+(?:,\s*\d+)*)$

This regex pattern says to match:

• ^ from the start of the value
• (?:
  • \s* either zero or more whitespace characters
  • | OR
  • \d+ a number
  • (?:,\s*\d+)* followed by zero or more other comma separated numbers
• )
• $ end of the value