I have a string which looks like. 

```
"[{'P_Key': 'val1', 'Price': '3.95'}, {'P_Key': 'val2', 'Price': '2.2'}, {'P_Key': 'val3', 'Price': '0.4'}]"

```

I want to convert this into a list of dictionaries like:

```
[{'P_Key': 'val1', 'Price': '3.95'}, 
 {'P_Key': 'val2', 'Price': '2.2'}, 
 {'P_Key': 'val3', 'Price': '0.4'}]

```

There may be any number of such dictionaries in the string.