code: def lines(n_traces=5,n=100,columns=None,dateIndex=True,mode=None):
  		
  	index=pd.date_range('1/1/15',periods=n) if dateIndex else list(range(n))
  	df=pd.DataFrame(np.random.randn(n,n_traces),index=index,
  		columns=getName(n_traces,columns=columns,mode=mode))
  	return df.cumsum()
docs: Returns a DataFrame with the required format for 
  	a scatter (lines) plot
  
  	Parameters:
  	-----------
  		n_traces : int
  			Number of traces 
  		n : int
  			Number of points for each trace
  		columns : [str]
  			List of column names
  		dateIndex : bool
  			If True it will return a datetime index
  			if False it will return a enumerated index
  		mode : string
  			Format for each item
  				'abc' for alphabet columns
  				'stocks' for random stock names