How can I find students who have same gender? The following screenshot is what I have done so far. Please show me the detailed codes.

D data_collection = { "student2": {"gender": "male", "major" :"Finance"}, "student3": {"gender": "male", "major": "Computer Science"}, "student4": {"gender": "female", "major": "Arts"}, "student5": {"gender": "female", "major": "Finance"}} D MJ data_collection [' student2' ] [' gender' ] 'male' D def matching_system (gender) : result = for student in data_collection: if gender == student ["gender" ] : result. append ( student) return result matching_system( 'male' ) TypeError in Traceback (most recent call last) return result 8 matching_system(1) in matching_system(gender) result = OUIAL for student in data_collection: if gender == student ["gender"] : result . append (student) return result TypeError: string indices must be integers