如何将每一行转换为列，并将冒号前的值转换为列名

data = [
    "列名1:值1",
    "列名2:值2",
    "列名1:值3",
    "列名3:值4",
    "列名2:值5"
]

result = {}

for row in data:
    column_name, column_value = row.split(":")
    if column_name in result:
        result[column_name].append(column_value)
    else:
        result[column_name] = [column_value]

print(result)

{
    "列名1": ["值1", "值3"],
    "列名2": ["值2", "值5"],
    "列名3": ["值4"]
}