code: def psdf1(self):
      return ps.from_pandas(self.pdf1)
  
imports: import unittest
  import datetime
  import numpy
  import pandas
  from pyspark import pandas
  from pyspark.testing.pandasutils import PandasOnSparkTestCase, TestUtils
label_desc: Use image node_id 7 for calling the ResampleSeriesMixin obj's underlying member method code with example usage: obj.psdf1() and returns: ps