How to add prefix in dataframe column for all via pyspark

data = [("James","Smith","USA","CA"),("Michael","Rose","USA","NY"),("Robert","Williams","USA","CA"),("Maria","Jones","USA","FL")]

columns = ["firstname","lastname","country","state"]

df = spark.createDataFrame(data, columns)

df.show()

prefix = "P_"

for column in df.columns:

 df = df.withColumnRenamed(column, prefix + column)

df.show()