Pyhon字符串处理

s=open(r"C:\Users\lenovo\Desktop\test.csv","w")
s.close()

with open(r"C:\Users\lenovo\Desktop\test.csv","a") as q:
    with open(r"C:\Users\lenovo\Desktop3.csv","r") as f:
        for i in f:
            p=i.strip()  #默许删除前后端 ‘\n\t\r’
            print(p.split(","))
            l=i.split(",")  #依照指定字符分割，以列表方法返回
            print(l)
            q.write(str(l)+",")
s=open(r"C:\Users\lenovo\Desktop\test.csv","w"