将列表元素转换为int时发生ValueError

Question

无法输入为int，它第一次起作用，我无法再次运行它。它将引发ValueError：int（）的无效文字，基数为10：”

nC=int(input("Enter the number of columns: "))
nameoFCol={}
if nC<1:
    print("There must be atleast one column dude!!\nTry again!!")
else:
    for i in range(nC):
        key=input("Please enter the column name: ")
        ListValues= [int(x) for x in input("Please enter the column 
values\n").split(' ')]
        nameoFCol[key] = ListValues
    print (nameoFCol)