Importerror: 'No Module Named Plotly. Plotly' in Linuxmint17.3

I am New in Python. Whenever I am trying to compile the following code to get a line graph shows some errors. But I don't know how to fix it. Here is my code :

import plotly.plotly as py
import plotly.graph_objs as go

# Create random data with numpy
import numpy as np

N = 500
random_x = np.linspace(0, 1, N)
random_y = np.random.randn(N)

# Create a trace
 trace = go.Scatter(
x = random_x,
y = random_y
)

data = [trace]

 py.iplot(data, filename='basic-line')

Shows the following error :

mks@mks-H81M-S /media/mks/KUTUBUDDIN1/test $ python datdaPlot.py 
Traceback (most recent call last):
  File "datdaPlot.py", line 1, in <module>
    import plotly.plotly as py
 ImportError: No module named plotly.plotly
 mks@mks-H81M-S /media/mks/KUTUBUDDIN1/test $   

Please help to fix this. Thanks in advance.

Added:
According to Spandan Brahmbhatt, I have installed pip by sudo pip install plotly. But still shows the following error: