code: def fit_predict(self, x, y):
      self.fit(x, y)
      return self.predict(x)
  
file_path: scattertext/scattertext/smoothing/sigmoidal.py
imports: import numpy
  from scipy.optimize import curve_fit
label_desc: Use image node_id 3 for calling the Sigmoidal obj's underlying member method code with example usage: obj.fit_predict(x, y) and returns: self