如何輸入JSON文件並打印一行

Question

編寫一個輸入JSON文件的程序（格式如 example1.json）並打印出標題字段的值。

import json 

# TODO: Read your json file here and return the contents 
def read_json(filename): 
    dt = {} 
    # read the file and store the contents in the variable 'dt' 
    with open(filename,"r") as fh: 
     dt = json.load(fh) 

    ###fh = open(filename, "r") 
    ###dt = json.load(fh) 

    return dt 


# TODO: Pass the json file here and print the value of title field. Remove the `pass` statement 
def print_title(dt): 
    print filename["title"] 


# TODO: Input a file from the user 
filename = raw_input("Enter the JSON file: ") 


# The function calls are already done for you 
r = read_json(filename) 
print_title(r) 

嗨，我是新來的Python，我不知道我做錯了什麼。我不斷收到以下消息： enter image description here

Answer 1

你幾乎在那裏，你只是混淆了參數名稱。

更改此：

def print_title(dt): 
    print filename["title"] 

要：

def print_title(dt): 
    print dt["title"]