使用adb的Python连续子进程调用

我正在尝试制作一个python脚本来通过adb检查数据库的内容。关键是在我的代码中，仅执行第一个subprocess.call（），其余的都被忽略。由于我是Python的新手，所以我不确定如何修复它。这是代码：

I am trying to make a python script to check the contents of a database via adb. The thing is that in my code,only the first subprocess.call() is executed and the rest are ignored. Since i am fairly new to Python, i am not sure how to fix it. This is the code:

import subprocess

def root():
    subprocess.call('adb shell',shell=True)
    x=input('Enter package name: ')
    openSql(x)


def openSql(x):
    subprocess.call('cd data/data/%s/databases/'%(x),shell=True)
    table=input('Enter table name: ')
    openTable(table)

def openTable(table):
    subprocess.call('sqlite3 table',shell=True)
    subprocess.call('select * from %s'%(table),shell=True)

root()

它给出没错，但是它只是在我的仿真器中进入了root用户。

It gives no error but it just enters root at my emulator and nothing else.

root@android:/ #