NameError: name 'lloyd' is not defined

```
students = [lloyd, alice, tyler]
lloyd = {
"name": "Lloyd",
"homework": [90.0, 97.0, 75.0, 92.0],
"quizzes": [88.0, 40.0, 94.0],
"tests": [75.0, 90.0]
}
alice = {
"name": "Alice",
"homework": [100.0, 92.0, 98.0, 100.0],
"quizzes": [82.0, 83.0, 91.0],
"tests": [89.0, 97.0]
}
tyler = {
"name": "Tyler",
"homework": [0.0, 87.0, 75.0, 22.0],
"quizzes": [0.0, 75.0, 78.0],
"tests": [100.0, 100.0]
}
# define averaging formula
def average(numbers):
total = sum(numbers)
total = float(total)
total = total / len(numbers)
return total
#get the average
def get_average(student):
homework = average(student["homework"])
quizzes = average(student["quizzes"])
tests = average(student["tests"])
return (0.1 * average(student["homework"])) + (0.3 * average(student["quizzes"])) + (0.6 * average(student["tests"]))
#assign averages to letter grades
def get_letter_grade(score):
if score >= 90:
return "A"
elif score >= 80:
return "B"
elif score >= 70:
return "C"
elif score >= 60:
return "D"
else:
return "F"
#calls function and prints letter
print get_letter_grade(get_average(lloyd))
#calculate class average
def get_class_average(students):
results = []
for student in students:
results.append(get_average(student))
return average(results)
#print results per student
print (get_class_average(students))
print (get_letter_grade(get_class_average))
```

works just fine on this site but in PyCharm it gets an error for line 1 and says name : lloyd not defined. can someone explain why it works on here but a copy paste doesnt work there?