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This article will explain in detail how to achieve automatic wallpaper replacement on boot in ubuntu16.04LTS. Xiaobian thinks it is quite practical, so share it with you as a reference. I hope you can gain something after reading this article.

function

function, is to crawl the latest wallpaper from Bing wallpaper, and then originally because I was afraid of putting too many things on the computer, I set a maximum number of pictures, reaching this threshold to delete all pictures = =|| Through python os module, set wallpaper,

Here you can refer to: how-to-change-desktop-background-from-common-line-in-unity , and considering that I may not be connected to the Internet when I first start up (bitter T_T), so I set a crawling interval.

code

# -*- coding: utf-8 -*-#!/ usr/bin/python#!/ bin/bash# ---------------------------------------------------------- ## This is a script which can change background automatically ## every time the system starts. ## author: Huang Zhenyang ## email: 745125931@qq.com ## ---------------------------------------------------------- ## ----- Import ----- #import osimport reimport urllibimport timeimport socket# --- End Import --- #class Spider(object): """ This is the spider to get the img from being """ def __init__( self, img_matched_pattern_para, url_para, file_name_para ): """ init function :param img_matched_pattern_para: the pattern to match a img :param url_para: url to crawler :param file_name_para: file name """ self.img_matched_pattern = img_matched_pattern_para self.url = url_para self.file_name = file_name_para def get_img(self): """ download the image :return: """ html = self.get_html() img_pos = re.search(self.img_matched_pattern, html) img_page_href = self.url + img_pos.group()[6:-7] + "download" urllib.urlretrieve(img_page_href, self.file_name) def get_html(self): """ return the html :return: page's html """ page = urllib.urlopen(self.url) html = page.read() return htmlclass Controller(object): """ This is the controller to control the spider's parameters. """ def __init__(self, pattern_href_para, path_para, url_para, img_max_num_para): """ :param pattern_href_para: href's match pattern :param path_para: path to save images :param url_para: url :param img_max_num_para: max number that the """ self.pattern_href = pattern_href_para self.path = path_para self.url = url_para self.img_max_num = img_max_num_para self.file_name = "" self.init_file_name = "0.jpg" self.file_extension_name = ".jpg" def judge(self): """ judge if the number of images is grater than img_max_num. if true, delete all of them and then run spider, else directly run spider. Also, we should set the file name. :return: """ root = None _dirs = None files = None for root, _dirs, files in os.walk(self.path, True): pass files_len = len(files) if files_len == 10: for i in range(0, 10): os.remove(root + files[i]) self.file_name = self.path + self.init_file_name else: self.file_name = self.path + str(files_len) + self.file_extension_name def run_spider(self): """ run spider. TODO: This function needs to be modified in the future which makes these two class coupling too much. :return: """ # In case user's computer hasn't connect the internet. for i in range(0, 60): try: spider = Spider(self.pattern_href, self.url, self.file_name) spider.get_img() break except IOError as e: print "Connection error: %s" % e time.sleep(60) continue except Exception as e: print "Connection error: %s" % e time.sleep(60) continue c_path = '"file://' + self.file_name + '"' # absolute path # call system command to change the gnome background os.system('gsettings set org.gnome.desktop.background picture-uri ' + c_path) print "gsettings set org.gnome.desktop.background picture-uri " + c_pathif __name__ == '__main__': pattern_href = r'href="/photo/.*? " rel="external nofollow" ' path ='/home/hzy/images/backgrounds/' url ='https://bing.ioliu.cn/'img_max_num = 10 controller = Controller(pattern_href, path, url, img_max_num) controller.judge() controller.run_spider()

start automatically when the system

In/home/hzy/.config/autostart, create a new xxx.desktop file with the following content:

[Desktop Entry]Name=autoChangeBackgroundImgComment=Python ProgramExec=python /home/hzy/Script/autoChangeBackgroundImg/autoChangeBackgroundImg.pyIcon=/home/hzy/Script/autoChangeBackgroundImg/autoChangeBackgroundImg.pngTerminal=falseMultipleArgs=falseType=ApplicationCategories=Application;Development;StartupNotify=true

Description:

1. The path after Exec is the path to the script

2. Icon, then you can just find a picture, set to the path can be

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