根据给定资料，编写出相应程序

account = {
    "科目代码": 1001,
    "科目名称": "银行存款",
    "期初数": 150000,
    "借方": 30000,
    "贷方": 15000
}
account["贷方"] = 5000
num = account["期初数"] + account["借方"] - account["贷方"]
account["期末数"] = num
print(account)

account={'科目':1001,
         '代码科目名称':'银行存款',
         '期初数':150000,'借方':30000,
         '贷方':10000}
account['贷方']=5000
account['期末数']=account['期初数']+account['借方']-account['贷方']
print(account)

输出：

{'科目': 1001, '代码科目名称': '银行存款', '期初数': 150000, '借方': 30000, '贷方': 5000, '期末数': 175000}

# -*- coding:utf-8 -*-

account = {
    "科目代码":1001,
    "科目名称":"银行存款",
    "期初数":150000,
    "借方":30000,
    "贷方":10000,
}

print(' 原始字典 '.center(40,'='))
print(account)

#修改贷方金额
account['贷方'] = 5000
#字典中增加"期末数"的key
account['期末数'] = account['期初数'] + account['借方'] - account['贷方']

print(' 修改后的字典 '.center(40,'='))
print(account)