문제 링크https://leetcode.com/problems/fill-missing-data/description/ 문제   코드 import pandas as pddef fillMissingValues(products: pd.DataFrame) -> pd.DataFrame: products["quantity"]=products["quantity"].fillna(0) return products

문제 링크 https://leetcode.com/problems/change-data-type/description/ 문제 코드import pandas as pddef changeDatatype(students: pd.DataFrame) -> pd.DataFrame: students['grade']=students['grade'].astype(int) return students

문제 링크https://leetcode.com/problems/rename-columns/description/ 문제 코드 import pandas as pddef renameColumns(students: pd.DataFrame) -> pd.DataFrame: students.rename( columns={ 'id': 'student_id', 'first': 'first_name', 'last': 'last_name', 'age': 'age_in_years', }, inplace=True, ) return students

문제 링크https://leetcode.com/problems/modify-columns/description/ 문제 코드import pandas as pddef modifySalaryColumn(employees: pd.DataFrame) -> pd.DataFrame: employees['salary'] = employees['salary']*2 return employees

문제 링크https://leetcode.com/problems/drop-missing-data/description/ 문제  코드import pandas as pddef dropMissingData(students: pd.DataFrame) -> pd.DataFrame: return students[students['name'].notnull()]

문제 링크https://leetcode.com/problems/drop-duplicate-rows/description/ 문제  코드import pandas as pddef dropDuplicateEmails(customers: pd.DataFrame) -> pd.DataFrame: return customers.drop_duplicates(subset=['email'])