linting

.coveragerc

@@ -10,7 +10,7 @@ exclude_lines =
 	pragma: no cover
 	if __name__ == .__main__.:
 	if diagflag:
-	if options != None:
+	if options is not None:
 	^def plot
 	^def plot_comparison
 	^def suggest_method

.pylintrc

@@ -1,30 +1,15 @@
 [MASTER]
 
-# A comma-separated list of package or module names from where C extensions may
-# be loaded. Extensions are loading into the active Python interpreter and may
-# run arbitrary code.
-extension-pkg-allow-list=
-
-# A comma-separated list of package or module names from where C extensions may
-# be loaded. Extensions are loading into the active Python interpreter and may
-# run arbitrary code. (This is an alternative name to extension-pkg-allow-list
-# for backward compatibility.)
-extension-pkg-whitelist=
-
 # Specify a score threshold to be exceeded before program exits with error.
-fail-under=10.0
+fail-under=8.5
 
 # Files or directories to be skipped. They should be base names, not paths.
-ignore=CVS
+ignore=_version.py, _chartrand_tvregdiff.py
 
 # Files or directories matching the regex patterns are skipped. The regex
 # matches against base names, not paths.
 ignore-patterns=
 
-# Python code to execute, usually for sys.path manipulation such as
-# pygtk.require().
-#init-hook=
-
 # Use multiple processes to speed up Pylint. Specifying 0 will auto-detect the
 # number of processors available to use.
 jobs=1
@@ -34,22 +19,13 @@ jobs=1
 # complex, nested conditions.
 limit-inference-results=100
 
-# List of plugins (as comma separated values of python module names) to load,
-# usually to register additional checkers.
-load-plugins=
-
 # Pickle collected data for later comparisons.
 persistent=yes
 
 # When enabled, pylint would attempt to guess common misconfiguration and emit
 # user-friendly hints instead of false-positive error messages.
 suggestion-mode=yes
 
-# Allow loading of arbitrary C extensions. Extensions are imported into the
-# active Python interpreter and may run arbitrary code.
-unsafe-load-any-extension=no
-
-
 [MESSAGES CONTROL]
 
 # Only show warnings with the listed confidence levels. Leave empty to show
@@ -75,85 +51,17 @@ disable=dangerous-default-value,
 	duplicate-code,
 	invalid-name,
 	invalid-unary-operand-type,
-	print-statement,
-        parameter-unpacking,
-        unpacking-in-except,
-        old-raise-syntax,
-        backtick,
-        long-suffix,
-        old-ne-operator,
-        old-octal-literal,
-        import-star-module-level,
-        non-ascii-bytes-literal,
-        raw-checker-failed,
-        bad-inline-option,
-        locally-disabled,
-        file-ignored,
-        suppressed-message,
-        useless-suppression,
-        deprecated-pragma,
-        use-symbolic-message-instead,
-        apply-builtin,
-        basestring-builtin,
-        buffer-builtin,
-        cmp-builtin,
-        coerce-builtin,
-        execfile-builtin,
-        file-builtin,
-        long-builtin,
-        raw_input-builtin,
-        reduce-builtin,
-        standarderror-builtin,
-        unicode-builtin,
-        xrange-builtin,
-        coerce-method,
-        delslice-method,
-        getslice-method,
-        setslice-method,
-        no-absolute-import,
-        old-division,
-        dict-iter-method,
-        dict-view-method,
-        next-method-called,
-        metaclass-assignment,
-        indexing-exception,
-        raising-string,
-        reload-builtin,
-        oct-method,
-        hex-method,
-        nonzero-method,
-        cmp-method,
-        input-builtin,
-        round-builtin,
-        intern-builtin,
-        unichr-builtin,
-        map-builtin-not-iterating,
-        zip-builtin-not-iterating,
-        range-builtin-not-iterating,
-        filter-builtin-not-iterating,
-        using-cmp-argument,
-        eq-without-hash,
-        div-method,
-        idiv-method,
-        rdiv-method,
-        exception-message-attribute,
-        invalid-str-codec,
-        sys-max-int,
-        bad-python3-import,
-        deprecated-string-function,
-        deprecated-str-translate-call,
-        deprecated-itertools-function,
-        deprecated-types-field,
-        next-method-defined,
-        dict-items-not-iterating,
-        dict-keys-not-iterating,
-        dict-values-not-iterating,
-        deprecated-operator-function,
-        deprecated-urllib-function,
-        xreadlines-attribute,
-        deprecated-sys-function,
-        exception-escape,
-        comprehension-escape
+	raw-checker-failed,
+	bad-inline-option,
+	locally-disabled,
+	file-ignored,
+	suppressed-message,
+	useless-suppression,
+	deprecated-pragma,
+	use-symbolic-message-instead,
+	multiple-statements,
+	multiple-imports,
+	too-many-positional-arguments
 
 # Enable the message, report, category or checker with the given id(s). You can
 # either give multiple identifier separated by comma (,) or put this option
@@ -617,5 +525,5 @@ min-public-methods=2
 
 # Exceptions that will emit a warning when being caught. Defaults to
 # "BaseException, Exception".
-overgeneral-exceptions=BaseException,
-                       Exception
+overgeneral-exceptions=builtins.BaseException,
+                       builtins.Exception