Final answer:
The correct code snippet to find the maximum value in a list in Python is 'max_value = max(list)'
Step-by-step explanation:
The correct code snippet to find the maximum value in a list in Python is:
max_value = max(list)
This code uses the max() function in Python, which takes a list as an argument and returns the maximum value in that list.
For example, if you have a list of numbers [1, 5, 3, 8, 2], using max_value = max(list) will assign the value 8 to the variable max_value.