make python checks compatible with Python3

[jeanetteclark]

In testing the Jep implementation, I discovered that a decent amount of existing python checks are not compatible with Python3.

We need to update those checks to work with python 3. The most common issue is the use of the type unicode which should just be str in python 3. The process for this is looking like

• get all of the checks in src/checks that have <environment>python</environment>
• extract the code from the check element and write it out to a standalone python script
• use the python library 2to3 to convert the script (if needed) to python 3
• re-insert the python code into the check element
• test them all
• check changes in to the metadig-checks dev branch

[jeanetteclark]

Current list of checks not working and their errors:

check_id	status	output
entity.distributionURL.resolvable.1	FAILURE	ERROR: jep.JepException: <class 'TypeError'>: isinstance() arg 2 must be a type, a tuple of types, or a union
entity.format.nonproprietary.1	FAILURE	ERROR: jep.JepException: <class '_csv.Error'>: iterator should return strings, not bytes (the file should be opened in text mode)
entity.identifier.present.1	FAILURE	ERROR: jep.JepException: <class 'TypeError'>: isinstance() arg 2 must be a type, a tuple of types, or a union
entity.type.nonproprietary-1.0.0	FAILURE	ERROR: jep.JepException: <class '_csv.Error'>: iterator should return strings, not bytes (the file should be opened in text mode)
resource.awardFunderName.controlled-1.0.0	FAILURE	ERROR: jep.JepException: <class 'ModuleNotFoundError'>: No module named 'java.util.ArrayList'
resource.creatorIdentifier.present.1	FAILURE	ERROR: jep.JepException: <class 'TypeError'>: isinstance() arg 2 must be a type, a tuple of types, or a union
resource.distributionContact.present.1	FAILURE	ERROR: jep.JepException: <class 'TypeError'>: isinstance() arg 2 must be a type, a tuple of types, or a union
resource.distributionContactIdentifier.present.1	FAILURE	ERROR: jep.JepException: <class 'TypeError'>: isinstance() arg 2 must be a type, a tuple of types, or a union
resource.license.present.1	FAILURE	ERROR: jep.JepException: <class 'TypeError'>: isinstance() arg 2 must be a type, a tuple of types, or a union
resource.URLs.resolvable-1.0.0	FAILURE	ERROR: jep.JepException: <class 'TypeError'>: isinstance() arg 2 must be a type, a tuple of types, or a union

[jeanetteclark]

got all the checks working, and checked in to develop over on metadig-checks