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Is it possible to migrate from Python 2 to Python 3?
In the migration process, most of the codebases running Python 2 on production, would want their code to keep running. You can introduce Python 3 support, but you still need your code to work on Python 2. Six libraries provide a simple utility to wrap the differences between Python 2 and 3.
Is there a performance difference between Python and Scala?
Since Python code is mostly limited to high-level logical operations on the driver, there should be no performance difference between Python and Scala. A single exception is usage of row-wise Python UDFs which are significantly less efficient than their Scala equivalents.
How to use a Scala class in pyspark?
The Spark DataFrame (SQL, Dataset) API provides an elegant way to integrate Scala/Java code in PySpark application. You can use DataFrames to expose data to a native JVM code and read back the results. I’ve explained some options somewhere else and you can find a working example of Python-Scala roundtrip in How to use a Scala class inside Pyspark.
What’s the difference between MLlib and Scala algorithms?
While basic structures used with MLlib are plain Python RDD objects, all algorithms are executed directly using Scala. It means an additional cost of converting Python objects to Scala objects and the other way around, increased memory usage and some additional limitations we’ll cover later.
How to install the six module in python2.7?
Could you please let me know what is the six module for and how to get it installed in a Windows 7 machine? Python has it’s own package manager which is supposed to help you finding packages and their dependencies: http://www.pip-installer.org/en/latest/
Can you use six in Python 2 and 3?
StopIteration is raised if the iterator is exhausted. This is a replacement for calling it.next () in Python 2 and next (it) in Python 3. Python 2.6 and above have a builtin next function, so six’s version is only necessary for Python 2.5 compatibility.
Can a Python 2 code be ported to Python 3?
Most changes required to support Python 3 lead to cleaner code using newer practices even in Python 2 code. Another key point is that modernizing your Python 2 code to also support Python 3 is largely automated for you.