如何在 pathlib 中使用分隔符访问另一个文件/文件夹

如何解决如何在 pathlib 中使用分隔符访问另一个文件/文件夹

我有一个脚本，可以根据一天中的当前时间（白天或黑夜）更改 Windows 背景图像。我想让这个脚本具有可扩展性，以便在不改变代码的情况下在另一台计算机上使用。

from datetime import datetime,time
import pandas
import ctypes
from pathlib import Path

file_path = "myfile.xlsx" #sunrise/sunset file path
print(file_path)
data = pandas.read_excel(file_path,header=0) #Header on line 0

#Today as day number in reference to 1st of Jan
day = datetime.now().timetuple().tm_yday

#Today's parameters
#sr and ss are column names in the Excel spreadsheet for sunrise and sunset respectively
#Minus 1 to account for 0 based indexing
sunrise = data["sr"][day - 1]
sunset = data["ss"][day - 1] 

#Function to convert time objects into integers
def seconds_in_time(time_value: time):
    return (time_value.hour * 60 + time_value.minute) * 60 + time_value.second

notification_minutes = 5
notification_seconds = notification_minutes * 60
#Variable for a moment in time 5 minutes before the sunset
sunset_minus_five = seconds_in_time(sunset) - notification_seconds

#Setting up the day_night variable depending on the now variable
#delta calculates the difference in seconds between now and sunset -during night- and sunrise -during day-
#A negative value for delta means that now variable is equal to any moment between midnight and the sunrise  
if now > sunrise and now < sunset:
    day_night = 'day'
    delta = (seconds_in_time(now) - seconds_in_time(sunrise))
else:
    day_night = 'night'
    delta = (seconds_in_time(now) - seconds_in_time(sunset))
    
#delta_notification calculates the difference in seconds between now and sunset_minus_five
delta_notification = seconds_in_time(now) - sunset_minus_five

abs_path = Path().resolve()
print(abs_path)
sep = '\\'
target_path = abs_path + sep + day_night + '.jpg'
print(target_path)

#Function to change the wallpaper
def changeBG(target_path):
    ctypes.windll.user32.SystemParametersInfoW(20,path,3) #SystemParametersInfoW for x64 architecture

#Wallpaper when code is ran user log on
#changeBG(target_path)

此代码返回以下错误：

TypeError                                 Traceback (most recent call last)
<ipython-input-11-ca377c654d5c> in <module>
     42 print(abs_path)
     43 sep = '\\'
---> 44 target_path = abs_path + sep + day_night + '.jpg'
     45 print(target_path)
     46 

TypeError: unsupported operand type(s) for +: 'WindowsPath' and 'str'

在采用这种 pathlib 方法之前，我尝试了一种 静态 方法：

path = 'C:\\Users\\myuser\\Desktop\\Sunset\\wallpapers_desktop_only\\'+ day_night +'\\'+ vmc_imc_day_night() +'.jpg'

#Function to change the wallpaper
def changeBG(path):
    ctypes.windll.user32.SystemParametersInfoW(20,3) #SystemParametersInfoW for x64 architecture

这没有任何问题，因为 ctypes 期望的分隔符是 \\，但是 pathlib 返回我不能用作字符串的 \。>

如何使用 pathlib 来使用我的工作目录中的任何文件/目录？

解决方法

错误告诉你不能连接 str 和 WindowsPath， 尝试使用：

target_path = abs_path / '{}.jpg'.format(day_night)

,

pathlib 与您使用的方式不同。
使用 pathlib 时可以避免您自己添加分隔符，并且您可以使用 / 运算符（在包中覆盖）来连接路径

你应该尝试：

target_path = abs_path / f'{day_night}.jpg'