I have a column(array of strings), in a PySpark dataframe. How do I break the array and make separate rows for every string item in the array?

Question

I have a PySpark dataframe-

df = spark.createDataFrame([
    ("u1", [\'u1_row1\', \'u1_row2\', \'u1_row3\']),
    ("u2", [\'u2_row1\', \'u