text: import pandas as pd
  from statsmodels.formula.api import ols
  '''
  Creating an expample of reusable code building of the fibonacci example
  
  >>> import fish
  >>> fish.weight(30)
  'Your fish length: 30 cm, your fish weight: 363.4 g'
  '''
  
  def weight(L):
      # Importing dataset and creating dataframe
      df = pd.read_csv('data/Fish.csv')
  
      # Fitting model
      model = ols('Weight ~ Length3', data=df).fit()
  
      # Predicts on user input
      output = model.predict({'Length3':[float(L)]})
  
      return 'Your fish length: {} cm, your fish weight: {} g'.format(L, output[0].round(2))