Plotting CSV file with no headers

Hi,

I have some csv data like this swper which doesnt have headers in the columns.

I am trying to follow this tutorial here https://plot.ly/python/plot-data-from-csv/ using the code below

import plotly.plotly as py
import plotly.graph_objs as go
import plotly.figure_factory as FF

import numpy as np
import pandas as pd

# Import data from csv
df = pd.read_csv('/home/alec/Desktop/SWPER-Porthleven.csv')

sample_data_table = FF.create_table(df.head())



trace1 = go.Scatter(
                    x=df['0'], y=df['1'],  #I dont understand how to reference the Data without headers???
                    mode='lines', name='logx' # Additional options
                   )

layout = go.Layout(title='Simple Plot from csv data',
                   plot_bgcolor='rgb(230, 230,230)')

fig = go.Figure(data=[trace1,], layout=layout)

# Plot data 
py.plot(fig, filename='SWPER')

but I dont understand how to reference the Data without headers???

Could anyone help me?