<|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
Using Python, write code to check if a list contains duplicates or not.
list = [10, 20, 30, 40, 50]<|im_end|>
<|im_start|>assistant
def has_duplicates(list): 
    seen = set() 
    for item in list: 
        if item in seen: 
            return True 
        seen.add(item) 
    return False<|im_end|>
