python查看指定的进程是否存在

import os
class Paly_Install(object):"""项目根目录"""def get_path(self):self.basedir = os.path.dirname(os.path.abspath(__file__))"""安装失败的txt文件"""def test_app(self):self.app=["com.facebook.katana","com.whatsapp","com.facebook.orca","com.instagram.android","com.google.android.youtube","com.zhiliaoapp.musically","com.shopee.sg","com.google.android.gm","com.pinterest","com.amazon.mShop.android.shopping","com.twitter.android","com.lazada.android","com.spotify.music","com.google.android.apps.maps","com.opera.app.news","org.detikcom.rss"]# self.app=["com.facebook.katana",#     "com.whatsapp",#     "com.facebook.orca",#     "com.instagram.android",#     "com.google.android.youtube",#     "com.tencent.mobileqq",#     "com.tencent.wework",#     "com.google.android.gm",#     "com.android.vending",#     "com.sh.smart.caller",#     "com.skype.raider",#     "org.telegram.messenger",#     "jp.naver.line.android",#     "com.whatsapp.w4b",#     "com.debug.loggerui"#     ]return self.appdef get_dir_path(self):self.dir_path = os.path.join(self.basedir, 'process')if not os.path.exists(self.dir_path):os.makedirs(self.dir_path, exist_ok=True)self.file_path=os.path.join(self.dir_path, 'process_app.txt')  # 直接返回完整的文件路径print(f"self.file_path是{self.file_path}")for i in range(0, len(self.test_app())):precess=os.popen(f"adb shell ps -A | findstr {self.test_app()[i]}").read().strip()print(f"{self.test_app()[i]}进程是{precess}")# with open(self.file_path, "a+") as fp:#     fp.write(precess)#     #fp.write('\n')os.system("pause")
ss=Paly_Install()
ss.get_path()
ss.get_dir_path()