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说明

windows注册表中有两支子健存储有所有程序的安装信息，因此我们可以通过访问注册表获取已安装软件信息

• 64位：HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall，如下图：
  

• 32位：HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall，如下图：

代码实现

下面代码使用python3实现

class SoftwareManager:
    def __init__(self):
        self.sub_keys = [
            r'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall',
            r'SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall'
        ]
        self.__installed = self.__load_all_installed()

    def __get_value(self, each_key, name):
        try:
            value = winreg.QueryValueEx(each_key, name)[0]
        except Exception:
            value = None
        return value

    def __load_all_installed(self):
        installed = []
        for sub_key in self.sub_keys:
            with OpenKey(HKEY_LOCAL_MACHINE, sub_key) as sub_key_handle:
                for i in range(QueryInfoKey(sub_key_handle)[0]):
                    try:
                        each_key = OpenKey(HKEY_LOCAL_MACHINE, f'{sub_key}\\{EnumKey(sub_key_handle, i)}')
                    except Exception as e:
                        ...
                    else:
                        DisplayName = self.__get_value(each_key, "DisplayName")
                        if not DisplayName:
                            print(DisplayName)
                            continue
                        installed.append({
                            "DisplayName": DisplayName,
                            "DisplayVersion": self.__get_value(each_key, "DisplayVersion"),
                            "DisplayIcon": self.__get_value(each_key, "DisplayIcon"),
                            "InstallDate": self.__get_value(each_key, "InstallDate"),
                            "InstallLocation": self.__get_value(each_key, "InstallLocation"),
                            "Publisher": self.__get_value(each_key, "Publisher"),
                        })
                    finally:
                        each_key.Close()
        return installed

    def get_all(self):
        """
        获取所有安装列表
        :return:
        """
        return self.__installed

    def get_by_name(self, name):
        """
        通过名字查找已安装软件
        :param name: 
        :return: 
        """
        one = [i for i in self.__installed if i.get('DisplayName') == name]
        return one[0] if one else None

    def re_search(self, pattern, flags=0):
        """
        通过正则搜索匹配项
        :param pattern: 
        :param flags: 
        :return: 
        """
        return [i for i in self.__installed if re.search(pattern=pattern, string=i.get('DisplayName', ''), flags=flags)]	

调用

• 通过名字获取已安装软件信息

manager = SoftwareManager()

# 通过名字获取
wechat = manager.get_by_name("微信")
print(
	wechat['DisplayName'],  # 软件名
	wechat['DisplayVersion'],  # 软件版本
	wechat['InstallLocation'],  # 软件安装路径
)

• 使用正则匹配搜索

manager.re_search('微信') # 返回匹配列表

• 获取所有已安装软件

manager = SoftwareManager()
manager.get_all()  # 返回匹配列表

• 返回示例：

[
  {
      'DisplayName': 'ApiPost Agent 1.1.0', 'DisplayVersion': '1.1.0',
      'DisplayIcon': 'C:\\Program Files\\ApiPost Agent\\ApiPost Agent.exe,0',
      'InstallDate': None,
      'InstallLocation': None,
      'Publisher': None
  },
  {
      'DisplayName': 'Apifox 2.1.34', 'DisplayVersion': '2.1.34',
      'DisplayIcon': 'C:\\Program Files\\Apifox\\uninstallerIcon.ico',
      'InstallDate': None,
      'InstallLocation': None,
      'Publisher': 'Apifox Team'
  }
]