To read a python csv file, take user input, and increase and store the corresponding count for input

I got the name of the restaurant The Ranking.csv file exists and the entered restaurant name is in the Ranking.csv file I don't know how to write to csv by adding count +1 to the existing restaurant name without adding a row. Help me.

    rest_name = str(input())
    count = 1

    file_exist = os.path.exists('ranking.csv')
    if rest_name:
        if not file_exist:
            with open('ranking.csv', 'w') as csv_file:
                fieldnames = ['NAME', 'COUNT']
                writer = csv.DictWriter(csv_file, fieldnames=fieldnames)
                writer.writeheader()

        elif file_exist:
            # File Presence
            with open('ranking.csv', 'r') as csv_file:
                fieldnames = ['NAME', 'COUNT']
                reader = csv.DictReader(csv_file, fieldnames=fieldnames)
                for row in reader:
                    if rest_name == row:
                        with open('ranking.csv', 'a') as csv_file2:
                            writer = csv.DictWriter(csv_file2, fieldnames=fieldnames)
                            writer.writerow({'NAME': 5, 'COUNT': 5})

                else:
                    with open('ranking.csv', 'a') as csv_file:
                        fieldnames = ['NAME', 'COUNT']
                        writer = csv.DictWriter(csv_file, fieldnames=fieldnames)
                        writer.writerow({'NAME': rest_name, 'COUNT': count})

csv python write

2022-09-20 08:55

1 Answers

>>> import pandas as pd
>>> with open("ranking.csv", "w", encoding="utf-8") as f:
    f.write("""NAME,COUNT
Okryugwan, 111
The Great Wall of China, 1
Chicken Donald, 23""")


33
>>> rest = input ("What's your favorite restaurant? :")
What's your favorite restaurant? : Chicken Donald
>>> 
>>> df_rank = pd.read_csv("ranking.csv", encoding="utf-8")
>>> df_rank
   NAME  COUNT
0 Okryugwan 111
The Great Wall of China 1
2 Chicken Donald 23
>>> if rest in list(df_rank.NAME):
    df_rank.loc[df_rank["NAME"] == rest, "COUNT"] += 1
else:
    df_rank.loc[len(df_rank)] = [ rest, 1 ]


>>> df_rank
   NAME  COUNT
0 Okryugwan 111
The Great Wall of China 1
2 Chicken Donald 24
>>> # Chicken Donald has increased by one.
>>> rest = input ("What's your favorite restaurant? :")
What is your favorite restaurant? : Burger King
>>> if rest in list(df_rank.NAME):
    df_rank.loc[df_rank["NAME"] == rest, "COUNT"] += 1
else:
    df_rank.loc[len(df_rank)] = [ rest, 1 ]


>>> df_rank
   NAME  COUNT
OkRyuGwan 111 0
The Great Wall 1 1.
2 24 dakttonaldeu
Three Burger King 1.
>>> df_rank.to_csv("ranking.csv", encoding="utf-8", index=False)
>>> df_rank = pd.read_csv("ranking.csv", encoding="utf-8")
>>> df_rank
   NAME  COUNT
OkRyuGwan 111 0
The Great Wall 1 1.
2  닭도날드     24

Three Burger King 1.
>>>

2022-09-20 08:55

If you have any answers or tips

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