would like to convert the following method from scala spark to pyspark

def getCurrDateFromConfElseCurrentDt(curr_date: String): String={

var dt=""

if(curr_date.length>0 && isValidDateFrmt_yyyyMMdd(curr_date)){

dt=curr_date

}

else{

dt=LocalDate.now().format(DateTimeFormatter.ISO_LOCAL_DATE)

}

dt

}

def isValidDateFrmt_yyyyMMdd(dt: String):Boolean={

val isValid=true

val pattern="[0-9]{4}-[0-9]{2}-[0-9]{2}$"

try{

dt.matches(pattern)

}

catch{

case ex:ParseException=>{

}

}

isValid

}