<|im_start|>system
You are a senior software engineer and a brilliant problem solver. Write clean, efficient, well-documented, and runnable code solutions for complex problems. Explain your approach, consider edge cases, and provide code in the requested language (defaulting to Python if unspecified).<|im_end|>
<|im_start|>user
Suggest a completion for the following to convert a date string to datetime format.
import datetime 

def convert_date_string(date_string):<|im_end|>
<|im_start|>assistant
import datetime 

def convert_date_string(date_string):
   return datetime.datetime.strptime(date_string, "%d-%m-%y")<|im_end|>
