Undefined name 'file_format' in process_datasets.py

[cclauss]

flake8 testing of https://github.com/IBM/knowledge-enabled-textual-entailment on Python 3.7.1

$ flake8 . --count --select=E9,F63,F72,F82 --show-source --statistics

./data_preprocessing/process_datasets.py:91:39: F821 undefined name 'scitail'
                         file_format: "scitail", kg_sparql_endpoint=None):
                                      ^
./data_preprocessing/process_datasets.py:315:20: F821 undefined name 'file_format'
                if file_format == "snli":
                   ^
./data_preprocessing/process_datasets.py:317:22: F821 undefined name 'file_format'
                elif file_format == "scitail":
                     ^
./data_preprocessing/process_datasets.py:319:22: F821 undefined name 'file_format'
                elif file_format == "multinli":
                     ^
4     F821 undefined name 'scitail'
4

E901,E999,F821,F822,F823 are the "showstopper" flake8 issues that can halt the runtime with a SyntaxError, NameError, etc. These 5 are different from most other flake8 issues which are merely "style violations" -- useful for readability but they do not effect runtime safety.

• F821: undefined name name
• F822: undefined name name in __all__
• F823: local variable name referenced before assignment
• E901: SyntaxError or IndentationError
• E999: SyntaxError -- failed to compile a file into an Abstract Syntax Tree