code: def time_frame_period_formatting_default_explicit(self, nobs, freq):
      self.data["p"].dt.strftime(date_format=self.default_fmt)
  
imports: import numpy
  import pandas
  from pandas import offsets
label_desc: Use image node_id 4 for calling the PeriodStrftime obj's underlying member method code with example usage: obj.time_frame_period_formatting_default_explicit(nobs, freq) without return types