Groovy Script for assertion to check whether the value is 0 or null in groovy script response

nmrao 

Below is the groovy script i am using to execute the python script from ReadyApi

def table_count = ["python" , "C:/Pythonscripts/test.py", host,db_password,db_id]
def process = new ProcessBuilder(table_count).redirectErrorStream(true).start()
process.inputStream.eachLine {
log.warn(it)
}
process.waitFor()
return process.exitValue()

In the groovy response i got 

Thu Jun 18 03:20:19 EDT 2020: WARN: 44

So i must put an assertion that 0 or null should not come in the response.  

Thanks