def --str-- (self) """ pre: none post: returns a string with the attributes of the course separated by a comma in the order: semester, year, department, number, instructor, credits, grade for example: Fall, 2616, CS, 160, Reed, 3.0 A poss def toCSV(self) rightarrow str: """ pre: none post: returns a string with the attributes of the course separated by a comma in the order: semester, year, department, number, instructor, credits, grade for example: Fall, 2616, CS, 160, Reed, 3.0, A def fromCSV(self) rightarrow str: """ pre: none post: returns a string with the attributes of the course separated by a comma in the order: semester, year, department, number, instructor, credits, grade for example: Fall, 2616, CS, 160, Reed, 3.0, A") def --str-- (self) """ pre: none post: returns a string with the attributes of the course separated by a comma in the order: semester, year, department, number, instructor, credits, grade for example: Fall, 2616, CS, 160, Reed, 3.0 A poss def toCSV(self) rightarrow str: """ pre: none post: returns a string with the attributes of the course separated by a comma in the order: semester, year, department, number, instructor, credits, grade for example: Fall, 2616, CS, 160, Reed, 3.0, A def fromCSV(self) rightarrow str: """ pre: none post: returns a string with the attributes of the course separated by a comma in the order: semester, year, department, number, instructor, credits, grade for example: Fall, 2616, CS, 160, Reed, 3.0, A")