Question

This is for python.

I am getting the error, "TypeError: 'Series' objects are mutable, thus they cannot be hashed". (avgOPSdict is a dictionary, year is a list). Any help would be appreciated! How would I go about fixing this code?

yearAvgOPS = []
for i in range (0, len(playerOPS)):
x = avgOPSdict[year[i]] #this line is indented but chegg doesn't let me indent
yearAvgOPS.append(x) #this line is indented but chegg doesn't let me indent
print(yearAvgOPS)

Answer 1

Point-1: Let first learn about what are mutable and immutable objects. In python, if the value of a variable can be changed it is called mutable. While those objects which don't change their values are called immutable. Objects of built-in types like int, float,str and bool, etc. are immutable. Objects of built-in types like list, set, dict are mutable.

Poitnt-2: Another thing we must know about is hashable objects. An object is hashable or can be hashed if it's hash value is not changed during its lifetime. All of Python’s immutable built-in objects can be hashed or are hashable but lists or dictionaries are not hashable since they are mutable and their values can be changed.

Answer: So here in your code you are trying to add it to a dictionary to fix it use immutable objects (tuple, string, int.) as keys in your dictionary.

avgOPSdict[year[i]] is a mutable object so it cannot be hashed.

HAPPY LEARNING