can only concatenate str (not "list") to str
时间: 2023-11-21 08:04:50 浏览: 25
This error occurs when you try to concatenate a string and a list using the + operator. Python does not allow this operation because it cannot concatenate two different data types.
To resolve this error, you need to convert the list to a string before concatenating it with the other string. You can use the join() method to convert the list to a string and then concatenate it with the other string.
Here's an example:
```
my_list = ['hello', 'world']
my_string = ' '.join(my_list) # converts list to string with a space separator
print(my_string + '!')
```
Output:
```
hello world!
```
In this example, we first convert the list `my_list` to a string using the join() method, which adds a space separator between the two words. Then we concatenate the resulting string with the exclamation mark using the + operator.
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