添加表头，不是添加索引

list1 = df.x2
file = "C:/Users/Administrator/Desktop/连续3天 0商机.csv"
with open(file, 'w', newline='') as f:
    fieldnames = ['门店名称','日期','人数','商机量','查看次数','二手带看量','人均商机量','人均查看次数']
    writer = csv.DictWriter(f,fieldnames=fieldnames)
    writer.writeheader()
    
    for i in range(len(list1) - 2):
        if list1[i] + list1[i + 1] + list1[i + 2] == 0:
        # if list1[i] > 3 and list1[i + 1] > 3 and list1[i + 2] > 3:
            for j in range(2):
                index = [str(df.name[i + j]), str(df.date[i + j]), str(df.x1[i + j]), str(df.x2[i + j]),str(df.x3[i + j]),str(df.x4[i + j]),
                         str(df.y1[i + j]),str(df.y2[i + j]),"\n"]
                print(index)
                str1 = ",".join(index)      # 列表list 改为 字符串str        --文本      ，csv
#                 file = "C:/Users/Administrator/Desktop/连续3天0商机try.csv"
#                 with open(file, 'a') as f:
                f.write(str1)