I am getting some error while generating the `unique id` using `uuid` in Python. I am explaining those error below.

> 
> Error:
> 
> 
> 

```
Exception Type:     TypeError
Exception Value:    

coercing to Unicode: need string or buffer, UUID found

```

I am explaining my code below.

```
import uuid
filename='+uuid.uuid4()+'.csv'

```

Here I need to put the file name as some unique id but getting the above error. Please help me to resolve this error.