import os
import pandas as pd
 
df_main = pd.DataFrame()

for file in os.listdir():
    if file.endswith("Milan.csv"):
        df_temp = pd.read_csv(file)
        df_main = df_main.append(df_temp, ignore_index=True)

df_main.to_csv("output.csv", index=False)

使用pathlib：

from pathlib import Path

import pandas as pd

path = "/path/to/files/"
(pd
 .concat(objs=(pd.read_csv(x) for x in Path(path).glob("*Milan.csv")), ignore_index=True)
 .to_csv(path_or_buf=f"{path}output.csv", index=False)
 )