如何在python中使用不同类型的元素连接列表？

Question

list1 = [1,"3",2323,"pause"]
list2 = ["2","4","5"]
print ",".join(list1)
print ",".join(list2)

For the above code, the elements of list2 can be connected without any problems. But the join of list1 reports error

TypeError: sequence item 0: expected string, int found

I know that join works only for strings, then how to join the elements of a list with different types?

Answer 1

Convert the items to strings first.

",".join(str(elem) for elem in list1)

or

",".join(map(str, list1))

Answer 2

Try it:

list1 = [1,"3",2323,"pause"]
list1 = [str(item) for item in list1]
print ",".join(list1)

Answer 3

str.join will work only on list of string. So, apply str() to each element! map() builtin function will come in handy.

Try yourself, if you're gonna have problems - come back ;)