问循环遍历目录中的文件，在熊猫中添加日期列。

EN

path = 'C:\\Users\\'  
filelist = os.listdir(path)     #All of my .csv files I am working with
file_count = len(filelist)      #I thought I could do a for loop and use this as a the range
df = Series(filelist)           #I just added this because I couldn't get the date from a list
date_name = df.str[15:-4]       #This gives me the date 

for file in filelist:
    df = pd.read_csv(file)

path = 'C:\\Users\\'
filelist = glob.glob(path + "/*.csv")
frame = pd.DataFrame()
list = []
for file in filelist:
    df = pd.read_csv(file)
    list_.append(df)
frame = pd.concat(list)

path = 'C:\\Users\\'
filelist = os.listdir(path) 
list = []
frame = pd.DataFrame()
for file in filelist:
    df2 = pd.read_csv(path+file)
    date_name = file[15:-4]
    df2['Date'] = date_name
    list.append(df2)
frame = pd.concat(list)