问shell脚本文件中出现文本文件正忙错误

EN

           if self.ShellInput == "install":
                    if self.enterdPassword == True:
                        self.instPack = input(str("Package Name: "))
                        self.fullInstall = "echo " + self.userPassword + " | sudo -S apt -y install " + self.instPack
                        with open('install.sh', 'w') as self.installShell:
                            self.installShell.write(self.fullInstall)
                            print("SOFTWARE IS NOW READY")
                            ShellScriptHandeler.OpenShellscript.installSoftware()

    def installSoftware(self):
        self.shellscript = subprocess.Popen([self.installPath], shell=True, stdin=subprocess.PIPE )
        self.shellscript.stdin.write('yes\n'.encode("utf-8"))
        self.shellscript.stdin.close()
        self.returncode = self.shellscript.wait()