def make_pizza(*toppings):
for j in range(0,len(toppings)):
print(str(j) + toppings[j])
list1 = ['s1','s2','s3','s4']
list2 = ['s3','s45','s4','s5']
make_pizza(list1,list2)
make_pizza('sdf','asdf','asdf','asdf')
运行结果出现错误如下:
r@r:~/python$ python3 1.py
Traceback (most recent call last):
File "1.py", line 6, in <module>
make_pizza(list1,list2)
File "1.py", line 3, in make_pizza
print(str(j) + toppings[j])
TypeError: must be str, not list
关键在于print() 括号内,用加号连接的必须是str类型。固必须把列表转化成str
一定是需要str的地方,出现了非str类型对象。
解决方法:强制转换成str