Issue title: Correctly format print in 'python/svm_training.py'
 Issue body: We will replace all generic print statements within `svm_training.py` with an implementation of the following style:

``` python
print json.dumps({'key1':'val1'}, separators=(',', ': '))
```

 Comments: 
 Comment 0: We accidentally used _php_ variable notation for `$msg`, which should be changed to `msg`.

{'source': 'GithubIssues', 'repo_name_with_owner': 'jeff1evesque/machine-learning', 'issue_id': 42730421, 'repo_stars': 250.0}