ImportError: No module named pyspark, when running pi.py

[Ashish Kumar]

*Command:*
sudo python ./examples/src/main/python/pi.py

*Error:*
Traceback (most recent call last):
  File "./examples/src/main/python/pi.py", line 22, in <module>
    from pyspark import SparkContext
ImportError: No module named pyspark