1.提取data.json中的數(shù)據(jù)貌夕，將每條數(shù)據(jù)中的name僵缺、text获三、love和comment信息。并且保存到另外一個(gè)json文件中
import json
with open('./files/data.json', 'r', encoding='utf-8') as f:
contents = json.load(f)
data = contents['data']
f.close()
list1 = []
for msg in data:
new_data = {'name': msg['name'], 'text': msg['text'], 'love': msg['love'], 'comment': msg['comment']}
list1.append(new_data)
with open('./files/new_data.json', 'w', encoding='utf-8') as f:
json.dump(list1, f, ensure_ascii=False, indent=4)
f.close()
2.統(tǒng)計(jì)data.json中comment數(shù)量超過(guò)1000的個(gè)數(shù)
import json
with open('./files/data.json', 'r', encoding='utf-8') as f:
contents = json.load(f)
data = contents['data']
f.close()
count = 0
for msg in data:
if int(msg['comment']) > 1000:
count += 1
print(count)
3.將data.json文件中所有點(diǎn)贊數(shù)(love)對(duì)應(yīng)的值超出1000的用k來(lái)表示梳凛，例如1000修改為1k, 1345修改為1.3k
import json
with open('./files/data.json', 'r', encoding='utf-8') as f:
contents = json.load(f)
data = contents['data']
f.close()
for msg in data:
if int(msg['love']) >= 1000:
msg['love'] = str(round(int(msg['love'])/1000, 1)) + 'k'
with open('./files/data.json', 'w', encoding='utf-8') as f:
json.dump(contents, f, ensure_ascii=False, indent=4)
f.close()
4.寫(xiě)猜數(shù)字游戲耿币，如果輸入有誤，提示重新輸入韧拒，直達(dá)輸入正確為止掰读。比如：輸入數(shù)字的時(shí)候沒(méi)有按要求輸入秘狞，提示重新輸入
import random
num = random.randint(0,100)
try:
num1 = int(input('請(qǐng)輸入數(shù)字(0-100):'))
while True:
if num1 == num:
print('恭喜你，猜對(duì)了５讣Ｋ甘浴！')
break
else:
if num1 > num:
print('大了拢肆，再小點(diǎn)减响！')
num1 = int(input('請(qǐng)重新猜:'))
else:
print('小了，再大點(diǎn)郭怪！')
num1 = int(input('請(qǐng)重新猜:'))
except ValueError:
num1 = int(input('您的輸入有誤支示，請(qǐng)重新輸入:'))
運(yùn)行結(jié)果：
請(qǐng)輸入數(shù)字(0-100):aa
您的輸入有誤，請(qǐng)重新輸入:
5.寫(xiě)學(xué)生管理系統(tǒng)的添加學(xué)生功能(數(shù)據(jù)需要本地化)鄙才，要求除了保存學(xué)生的基本信息以外還要保存學(xué)生的學(xué)號(hào)颂鸿，但是學(xué)號(hào)需要自動(dòng)生成
生成原則：
添加第一個(gè)學(xué)生對(duì)應(yīng)的學(xué)號(hào)是:py001 第二次添加的學(xué)生的學(xué)號(hào)是:py002 ... 如果前面的學(xué)生因?yàn)楦鞣N原因被移除了，那后面添加學(xué)生的時(shí)候原則不變攒庵，就是比如上次已經(jīng)添加到py012,那么前面不管有沒(méi)有刪除情況嘴纺，再次添加學(xué)生的學(xué)號(hào)是py013
import json
key_students = 'students'
key_number = 'number'
key_name = 'name'
key_age = 'age'
key_tel = 'tel'
key_id = 'id'
def read_data(filename):
try:
with open('./files/'+filename, 'r', encoding='utf-8') as f:
return json.load(f)
except:
return None
def write_data(filename,contents):
try:
with open('./files/'+filename, 'w', encoding='utf-8') as f:
json.dump(contents, f, ensure_ascii=False, indent=4)
return True
except:
return False
def get_system_info():
system_info = read_data('stu.json')
if system_info:
return system_info
else:
return {}
def create_id():
system_info = get_system_info()
number = system_info.get(key_number,0)
number += 1
id = 'python' + str(number).rjust(3,'0')
return id,number
while True:
print('===================')
print('1.添加學(xué)生\n2.退出')
print('===================')
value = input('請(qǐng)選擇:')
if value == '1':
name = input('請(qǐng)輸入學(xué)生名字:')
age = input('請(qǐng)輸入學(xué)生年齡:')
tel = input('請(qǐng)輸入學(xué)生電話:')
id,number = create_id()
stu = {key_name:name, key_age:age, key_id:id, key_tel:tel}
# 保存學(xué)生信息
system_info = get_system_info()
students = system_info.get(key_students,[])
students.append(stu)
# 保存到文件中
system_info[key_students] = students
system_info[key_number] = number
re = write_data('stu.json',system_info)
if re:
print('添加成功！')
else:
print('添加失斉啊栽渴！')
elif value == '2':
break
else:
continue
