Day 9

아니 왜케..

머리가 돌이 된 것같지..

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# Dictionary

list와 약간 다름

dictionary는 키가 식별하는 요소가 있음

 

형식

{"key" : value}

# {"key": value}
programming_dictionary = {
    "Bug":
    "An error in a program that prevents the program from running as expected.",
    "Function":
    "A piece of code that you can easily call over and over again.",
    "Loop": "The action of doing something over and over again."
}

list[0] & dictionary 차이점
사전은 키가 식별하는 요소가 있음

# retrieving items from dictionary.
print(programming_dictionary["Bug"])

문제 : 올바른 function을 사용하지 않음
ㄴ 데이터 형식에서 키를 제공하도록 해야함
Loop: "The action of doing something over and over again."
ㄴ KeyError: 'Loop'
9 : "seveteen members 9th."
print(programming_dictionary[9])  → 출력됨

# adding new items to dictionary.
programming_dictionary["svt"] = "seventeen is k-pop idol."

# create an empty dictionary
empty_dictionary = {}
empty_dictionary = []  # add function

# wipe an existion dictionary
programming_dictionary = {}
print(programming_dictionary)

# edit an iten in a dictionary
programming_dictionary["Bug"] = "A moth in your computer."

# loop through a dictionary
for key in programming_dictionary:
  print(key)
  print(programming_dictionary[key])

 

Grading Program

# TODO-1: Create an empty dictionary called student_grades.
student_grades = {}

# TODO-2: Write your code below to add the grades to student_grades.👇

for student in student_scores:
    score = student_scores[student]
    if score > 90:
        student_grades[student] = "Outstanding"
    elif score > 80:
        student_grades[student] = "Exceeds Expectations"
    elif score > 70:
        student_grades[student] = "Acceptable"
    elif score < 70:
        student_grades[student] = "Fail"