pyspark安装错误，“ImportError：没有名为pyspark的模块”

Question

我正在尝试将apache spark-1.6.1作为独立模式安装。我关注了“https://github.com/KristianHolsheimer/pyspark-setup-guide”链接。 但是，执行

之后

$ sbt/sbt assembly

我试过了

$ ./bin/run-example SparkPi 10"

但是，它出错了，

./bin/run-example: line 26: /home/dasprasun/opt/spark/bin/load-spark env.sh: No such file or directory
Failed to find Spark examples assembly in /home/dasprasun/opt/spark/lib or /home/dasprasun/opt/spark/examples/target
You need to build Spark before running this program

完成所有步骤后，我在ipython中提供了以下命令

In [1]: from pyspark import SparkContext

它出现以下错误：

ImportError Traceback (most recent call last) <ipython-input-1-47c4965c5f0e> in <module>()
----> 1 from pyspark import SparkContext
ImportError: No module named pyspark

我不明白发生了什么。请帮我解决这个问题。