python - Python PrettyTable - 在列中输入一次值并更新其出现次数

Question

我创建了一个漂亮的表格，如下所示：

from prettytable import PrettyTable
from datetime import datetime, timedelta, timezone

# objects
my_table = PrettyTable()
my_table.field_names = ["Permit_Type", "Count"]

permit_type_list = ["P1", "R4", "P1", "R2", "Q6", "Q6"]

def get_list_of_permissions():
        start_count = 0
        for permission in permit_type_list:
            start_count += 1
            my_table.add_row([permission, start_count])
        print(my_table)

get_list_of_permissions()

我想要一个提供以下输出的表：

+--------------------------------------+-----------+
|             Permit_Type              | Count     |
+--------------------------------------+-----------+
|                 P1                   |     2     |
|                 R4                   |     1     |
|                 R2                   |     1     |
|                 Q6                   |     2     |

目前，如果 Permit_Type 在列表中出现不止一次，我的代码会在表中多次列出 Permit_Type 并且 Count 只会增加

Answer 1

我能够自己解决这个问题:-)

from collections import Counter
from prettytable import PrettyTable

# objects
my_table = PrettyTable()
my_table.field_names = ["Permit_Type", "Count"]
def get_list_of_permissions():
    requests = []
    for permission in permit_type_list:
        requests_in_list.append(permission)
    req_count = Counter(requests_in_list)

    for key, value in req_count.most_common():
        my_table.add_row([key, value])
     print(my_table)