fix pylint to match datasheet names

Author: gpongelli

.pylintrc

@@ -267,7 +267,7 @@ argument-rgx=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
 # attr-name-hint=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
 
 # Regular expression matching correct attribute names
-attr-rgx=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
+attr-rgx=(([A-Za-z][a-z0-9_]{1,30})|(_[a-z0-9_]*))$
 
 # Bad variable names which should always be refused, separated by a comma
 bad-names=foo,bar,baz,toto,tutu,tata
@@ -304,7 +304,7 @@ function-rgx=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
 
 # Good variable names which should always be accepted, separated by a comma
 # good-names=i,j,k,ex,Run,_
-good-names=r,g,b,w,i,j,k,n,x,y,z,ex,ok,Run,_
+good-names=r,g,b,w,i,j,k,n,x,y,z,ex,ok,Run,_,I,O,C,N
 
 # Include a hint for the correct naming format with invalid-name
 include-naming-hint=no