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In case you are wondering how to use the awesome LIBSVM package with the awesome PyCharm IDE, here is a brief guide:

LIBSVM documentation  mention you need to

  • Download  libsvm(version 3.2 at the time of this writing)
  • Extract the zip to a folder. By default, this libsvm-3.20
  • Go to your command prompt, within the extracted directory, libsvm-3.20/, type “make”. This will create a file called If this doesn’t work, google how to enable make command on Mac OS.
  • go to libsvm-3.20/python directory, type make. This will create 2 files: and

Now, within PyCharm, say that you have a folder called Project/code/ where your code is stored at this level. Copy and mentioned above to your Project/code/ directory and Copy file to your Project/ directory.

From Project/code/ python file you can import the svm library with

from svmutil import *

That’s it. You should be all set.


My code is pulling JSON data from a web service I wrote. That JSON data is then loaded into a python dictionary. Things works fabulously when I debug in my local console running an internal web server provided by the App Engine SDK. But when I upload the application to Goole CLoud Engine, things break. This is a snippet of my code

except Exception as ex:
   self.response.write("Google says: %s"%(ex.message))
   self.response.write("Try refreshing the page (again)")

I have all the states abbreviation as keys. when I try to access the value of the dictionary directly using square brackets, like


Google App Engine complains about KeyError exception. However if I try iterating through the key using a for loop, like

for each_state in states:

it works flawlessly in the App Engine. I also found out that the following also works perfectly


The only thing I cannot do is accessing the dictionary using square brackets. That baffles me. If you know what’s up with that, drop me a line.