file IO common functions required (json, csv, request)

common.py

import csv
import json

class FileManager():

    def __init__(self):
        pass
    
    def validate(self,filename,data):

        should_convert = False

        is_dict = False
        is_list = False

        if isinstance(data, list) and data!=[]:
            if all(isinstance(item, dict) for item in data):
                is_dict = True
            elif all(isinstance(item, list) for item in data):
                is_list = True

        if ".json" in filename:
            should_convert = is_dict and True
        elif ".csv" in filename:
            should_convert = is_list and True
        
        return not should_convert
                

    def read(self,filename):

        with open( filename, "r", encoding='utf-8' ) as file_object:

            if ".json" in filename:
                data = json.load(file_object)

            elif ".csv" in filename:     
                csv_reader = csv.reader(file_object)
                data = list(csv_reader)

        return data

    def write(self,filename,data_list):

        flag = self.validate(filename,data_list)

        if flag:
            if ".json" in filename:
                data_list = self.csv_to_json(data_list)
            elif ".csv" in filename:
                data_list, key_list = self.json_to_csv(data_list)

        with open(filename,"w",encoding='utf-8') as file:
        
            if ".json" in filename:
                file.write(json.dumps(data_list, ensure_ascii=False, indent=4))
                
            elif ".csv" in filename:
                header = ",".join([ key for key in key_list]) + "\n"
                file.write(header)

                for data in data_list:    
                    temp = ",".join(data) + "\n"
                    file.write(temp)

    def csv_to_json(self,data_list):
        keys = [key for key in data_list[0]]
        result = []

        for data in data_list[1:]:
            temp = {k: v for k, v in zip(keys, data)}
            result.append(temp)

        return result


    def json_to_csv(self,data):
        
        key_list = [key for key in data[0]]
        data_list = []

        for temp in data:
            temp = [temp[key] for key in key_list]
            temp = ["" if data == [] else data for data in temp]
            data_list.append(temp)
        
        return data_list, key_list


    def generate_json(self,schema):
        pass

    def generate_csv(self,schema):
        pass

    def format_data(self,data):
        pass

    def compare(self,expected,observed):
        pass