50 def get_devices(adb_path='adb'):  argument
52         subprocess.check_call([adb_path, 'start-server'], stdout=devnull,
55         subprocess.check_output([adb_path, 'devices']).decode('utf-8'))
71 def _get_unique_device(product=None, adb_path='adb'):  argument
72     devices = get_devices(adb_path=adb_path)
75     return AndroidDevice(devices[0], product, adb_path)
78 def _get_device_by_serial(serial, product=None, adb_path='adb'):  argument
79     for device in get_devices(adb_path=adb_path):
81             return AndroidDevice(serial, product, adb_path)
85 def get_device(serial=None, product=None, adb_path='adb'):  argument
107         return _get_device_by_serial(serial, product, adb_path)
111         return _get_device_by_serial(android_serial, product, adb_path)
113     return _get_unique_device(product, adb_path=adb_path)
116 def _get_device_by_type(flag, adb_path):  argument
118         subprocess.check_call([adb_path, 'start-server'], stdout=devnull,
122             [adb_path, flag, 'get-serialno']).decode('utf-8').strip()
127     return _get_device_by_serial(serial, adb_path=adb_path)
130 def get_usb_device(adb_path='adb'):  argument
140     return _get_device_by_type('-d', adb_path=adb_path)
143 def get_emulator_device(adb_path='adb'):  argument
153     return _get_device_by_type('-e', adb_path=adb_path)
232 def version(adb_path=None):  argument
235     adb_path = adb_path if adb_path is not None else ['adb']
236     version_output = subprocess.check_output(adb_path + ['version'])
262     def __init__(self, serial, product=None, adb_path='adb'):  argument
265         self.adb_path = adb_path
266         self.adb_cmd = [adb_path]