你可以试试这个：

df = (
    pd.read_csv("file.csv", header=None, quoting=3) # QUOTE_NONE
        .replace('"', "", regex=True).iloc[:, :-1]
         # .set_axis(["col1", ...]) # optional
)

输出：

print(df)

     0       1   2   3
0  123  hahaha NaN NaN
1  345  hohoho NaN NaN

首先重新格式化文件：使用下面的代码删除开始双引号、结束换行符和结束双引号：

# Assuming your csv file is named 'file.csv' and is in the same directory that this code is running
with open ("formatted_file.csv", "w") as formatted_file:
    with open ("file.csv", "r") as file:
        for line in file:
            formatted_line = line.rstrip()[1:-1] + "\n"
            formatted_file.write(formatted_line)

然后使用新创建的文件。要检查它是否正常，您可以阅读以下内容：

with open ("formatted_file.csv", "r") as formatted_file:
    for line in formatted_file:
        print(line, end='')