解释Python代码:date_update=(datetime.datetime(2023,1,31,00,00,00) -time_time_result.iloc[j,2]).days
时间: 2024-05-17 13:15:02 浏览: 11
这行Python代码的作用是计算两个日期之间的天数差。具体来说,它用 datetime.datetime() 函数创建一个日期对象,表示2023年1月31日00:00:00。然后,用 time_time_result.iloc[j,2] 获取一个 pandas DataFrame 中的日期值,并将其与前面创建的日期对象相减,得到一个时间差值。最后,调用 .days 属性获取这个时间差值中的天数部分,并将其赋值给变量 date_update。
需要注意的是,这里的日期对象和时间差值都是通过 Python 标准库中的 datetime 模块来处理的。此外,前面提到的 pandas DataFrame 中的日期值也需要符合 datetime 模块的格式。
相关问题
import random import time import csv import os from datetime import datetime users={} for i in range(4): users_id=random.randint(0,10) users_score=random.randint(-8000,8000) users[users_id]=users_score with open('updates.csv','a')as f: csv_re=csv.writer(f) csv_re.writerow([users_id,users_score]) print(f'积分变动:{users_id} {users_score}') def aaa(): global users_id global users_score with open('updates.csv','r')as f: csv_re=csv.reader(f) for row in csv_re: users_id,users_score=row users_id=int(users_id) users_score=int(users_score) users[users_id]+=users_score if users[users_id]<0: users[users_id]=0 return users def bbb(): with open('Candidates.csv','w')as f: csv_re=csv.writer(f) csv_re.writerow([users_id,users_score]) def ccc(): global prize_winner weight=[] prize_winner=[] for uid,users_score in users.items(): if users_score >=3000: weight.append(3) elif users_score >=2000: weight.append(2) elif users_score >=1000: weight.append(1) else: weight.append(0) winner1=random.choices(list(users.keys()),weight) prize_winner.append(winner1[0]) print(f'一等奖:{prize_winner[0]}') def ddd(): winner2 = random.sample(list(users.keys()),2) prize_winner.append(winner2[0][1]) print(f'二等奖:{prize_winner[1]}') del users[prize_winner[1]] def timer(): nowtime=datetime.now() while True: if nowtime.weekday()==2 and nowtime.hour==22 and 0<=nowtime.minute<=60: return True else: return False for i in range(3): while not timer(): time.sleep(60) print(f'第{i+1}轮抽奖开始:') aaa() bbb() ccc() ddd() time.sleep(12) today_date_str=datetime.now().strftime('%Y_%m_%d') os.rename('updates.csv','{}.csv'.format(today_date_str))修改此段代码并且写出新代码
修改建议:
1. 代码缩进不规范,需要统一缩进方式;
2. 函数名不够清晰,需要更改为更能表示其功能的名称;
3. 函数之间没有明确的调用关系,需要添加调用关系。
新代码如下:
```python
import random
import time
import csv
import os
from datetime import datetime
# 初始化用户积分信息
users = {}
for i in range(4):
users_id = random.randint(0, 10)
users_score = random.randint(-8000, 8000)
users[users_id] = users_score
with open('updates.csv', 'a') as f:
csv_re = csv.writer(f)
csv_re.writerow([users_id, users_score])
print(f'积分变动:{users_id} {users_score}')
def update_scores():
global users_id
global users_score
with open('updates.csv', 'r') as f:
csv_re = csv.reader(f)
for row in csv_re:
users_id, users_score = row
users_id = int(users_id)
users_score = int(users_score)
users[users_id] += users_score
if users[users_id] < 0:
users[users_id] = 0
return users
def write_candidates():
with open('Candidates.csv', 'w') as f:
csv_re = csv.writer(f)
for uid, users_score in users.items():
csv_re.writerow([uid, users_score])
def draw_first_prize():
weight = []
for uid, users_score in users.items():
if users_score >= 3000:
weight.append(3)
elif users_score >= 2000:
weight.append(2)
elif users_score >= 1000:
weight.append(1)
else:
weight.append(0)
winner1 = random.choices(list(users.keys()), weight)
prize_winner = [winner1[0]]
print(f'一等奖:{prize_winner[0]}')
return prize_winner
def draw_second_prize(prize_winner):
winner2 = random.sample(list(users.keys()), 2)
prize_winner.append(winner2[0])
print(f'二等奖:{prize_winner[1]}')
del users[prize_winner[1]]
def is_draw_time():
nowtime = datetime.now()
if nowtime.weekday() == 2 and nowtime.hour == 22 and 0 <= nowtime.minute <= 60:
return True
else:
return False
for i in range(3):
while not is_draw_time():
time.sleep(60)
print(f'第{i+1}轮抽奖开始:')
update_scores()
write_candidates()
prize_winner = draw_first_prize()
draw_second_prize(prize_winner)
time.sleep(12)
today_date_str = datetime.now().strftime('%Y_%m_%d')
os.rename('updates.csv', '{}.csv'.format(today_date_str))
```
新代码修改了函数名,添加了调用关系,使得代码更加清晰易懂。同时,修改了代码缩进方式,使得代码风格更加规范。
class ExcelApp: def init(self, master): self.master = master master.title("Excel App") # 创建菜单栏 menubar = tk.Menu(master) master.config(menu=menubar) # 创建文件菜单及其子菜单 filemenu = tk.Menu(menubar, tearoff=0) filemenu.add_command(label="PA綫點檢表", command=lambda: self.load_excel("D:\點檢系統存放資料夾\點檢明細\點檢内容明細.xlsx")) filemenu.add_command(label="Excel 2", command=lambda: self.load_excel("excel2.xlsx")) filemenu.add_command(label="Excel 3", command=lambda: self.load_excel("excel3.xlsx")) menubar.add_cascade(label="文件", menu=filemenu) # 创建帮助菜单及其子菜单 helpmenu = tk.Menu(menubar, tearoff=0) helpmenu.add_command(label="关于", command=self.show_about) menubar.add_cascade(label="帮助", menu=helpmenu) # 创建工具栏 toolbar = tk.Frame(master, height=30) tk.Button(toolbar, text="打开", command=self.open_file).pack(side=tk.LEFT, padx=2, pady=2) tk.Button(toolbar, text="保存", command=self.save_to_excel).pack(side=tk.LEFT, padx=2, pady=2) toolbar.pack(side=tk.TOP, fill=tk.X) # 创建左侧面板 self.panel_left = tk.Frame(master, width=150, bg='lightcyan') self.panel_left.pack(side=tk.LEFT, fill=tk.Y) # 创建右侧面板 self.panel_right = tk.Frame(master) self.panel_right.pack(side=tk.LEFT, fill=tk.BOTH, expand=True) # 创建Frame来包含标签和下拉框 input_frame = tk.Frame(self.panel_right) input_frame.pack(side=tk.TOP, fill=tk.X, padx=5, pady=5) # 创建标签和下拉框 ri = datetime.datetime.now().strftime('%Y/%m/%d') ri1 = datetime.datetime.now().strftime('%H:%M:%S') self.label1 = tk.Label(input_frame, text="點檢日期") self.label1.pack(side=tk.LEFT, padx=2, pady=2) self.combobox1 = tk.ttk.Combobox(input_frame, values=[ri]) self.combobox1.pack(side=tk.LEFT, padx=2, pady=2) self.combobox1.current(0) self.label2 = tk.Label(input_frame, text="點檢時間") self.label2.pack(side=tk.LEFT, padx=2, pady=2) self.combobox2 = tk.ttk.Combobox(input_frame, values=[ri1]) self.combobox2.pack(side=tk.LEFT, padx=2, pady=2) self.combobox2.current(0)在這段代碼中需要在self.combobox2輸入實時跟新的時間
你可以使用 `after()` 方法来实现定时更新时间,例如每秒更新一次。具体实现方法如下:
1. 定义一个方法 `update_time`,用于更新时间和更新 Combobox 中的值。
```python
def update_time(self):
now = datetime.datetime.now()
date_str = now.strftime('%Y/%m/%d')
time_str = now.strftime('%H:%M:%S')
self.combobox1.configure(values=[date_str])
self.combobox1.current(0)
self.combobox2.configure(values=[time_str])
self.combobox2.current(0)
self.master.after(1000, self.update_time) # 每秒更新一次
```
2. 在 `__init__()` 方法中,调用 `update_time` 方法,启动时间更新。
```python
def __init__(self, master):
# ...
self.update_time() # 启动时间更新
```
注意,这里使用了 `self.master.after(1000, self.update_time)` 来实现定时更新。其中,`self.master` 是主窗口对象,`after()` 方法的第一个参数表示等待的时间(毫秒),第二个参数是要执行的方法。因此,上述代码表示每隔 1000 毫秒(即 1 秒),调用一次 `update_time` 方法,实现时间的更新。
相关推荐
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![docx](https://img-home.csdnimg.cn/images/20210720083331.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)