KeyError: 'date' in format dd-mm-yyyy

Question

#read the data in csv
df_sales = pd.read_csv("C:\\Users\\Yuvraj\\Downloads\\sales_data.csv",'utf-8')
#convert date field from string to datetime
df_sales = {1: "date", 2: "store", 3: "item", 4:"sales"}
df_sales['date'] = pd.to_datetime(df_sales['date'])

#show first 10 rows
df_sales.head(10)

试图将“日期”字段从字符串转换为日期时间

这是输出：KeyError: 'date'

我该怎么办？