Identifying USB to serial port given USB VID and PID using pyserial

Question

I am new learner in python. I want create a web application for send sms or call using data card. I have been send sms using data card but my issue that if I use multiple data card connect at a time how can check which usb port working fine or not. So I want get usb serial number or usb pid or vid.

import serial.tools.list_ports;
reslt =  serial.tools.list_ports.comports()
print serial.tools.list_ports.ListPortInfo.name

Result :

[('/dev/ttyS31', 'ttyS31', 'n/a'), ('/dev/ttyS30', 'ttyS30', 'n/a'),
 ('/dev/ttyS29', 'ttyS29', 'n/a'), ('/dev/ttyS28', 'ttyS28', 'n/a'),
 ('/dev/ttyS27', 'ttyS27', 'n/a'), ('/dev/ttyS26', 'ttyS26', 'n/a'),
 ('/dev/ttyS25', 'ttyS25', 'n/a'), ('/dev/ttyS24', 'ttyS24', 'n/a'),
 ('/dev/ttyS23', 'ttyS23', 'n/a'), ('/dev/ttyS22', 'ttyS22', 'n/a'),
 ('/dev/ttyS21', 'ttyS21', 'n/a'), ('/dev/ttyS20', 'ttyS20', 'n/a'),
 ('/dev/ttyS19', 'ttyS19', 'n/a'), ('/dev/ttyS18', 'ttyS18', 'n/a'),
 ('/dev/ttyS17', 'ttyS17', 'n/a'), ('/dev/ttyS16', 'ttyS16', 'n/a'),
 ('/dev/ttyS15', 'ttyS15', 'n/a'), ('/dev/ttyS14', 'ttyS14', 'n/a'),
 ('/dev/ttyS13', 'ttyS13', 'n/a'), ('/dev/ttyS12', 'ttyS12', 'n/a'),
 ('/dev/ttyS11', 'ttyS11', 'n/a'), ('/dev/ttyS10', 'ttyS10', 'n/a'),
 ('/dev/ttyS9', 'ttyS9', 'n/a'), ('/dev/ttyS8', 'ttyS8', 'n/a'),
 ('/dev/ttyS7', 'ttyS7', 'n/a'), ('/dev/ttyS6', 'ttyS6', 'n/a'),
 ('/dev/ttyS5', 'ttyS5', 'n/a'), ('/dev/ttyS4', 'ttyS4', 'n/a'),
 ('/dev/ttyS3', 'ttyS3', 'n/a'), ('/dev/ttyS2', 'ttyS2', 'n/a'),
 ('/dev/ttyS1', 'ttyS1', 'n/a'), ('/dev/ttyS0', 'ttyS0', 'n/a'),
 ('/dev/ttyUSB3', 'Huawei Technologies Co., Ltd. Modem/Networkcard ',
  'USB VID:PID=12d1:1506'),
 ('/dev/ttyUSB2', 'Huawei Technologies Co., Ltd. Modem/Networkcard ',
  'USB VID:PID=12d1:1506'),
 ('/dev/ttyUSB0', 'Huawei Technologies Co., Ltd. Modem/Networkcard ',
  'USB VID:PID=12d1:1506')]

and for

import serial.tools.list_ports;
print [port for port in serial.tools.list_ports.comports() if port[2] != 'n/a']

Result :

[('/dev/ttyUSB3', 'Huawei Technologies Co., Ltd. Modem/Networkcard ',
  'USB VID:PID=12d1:1506'),
 ('/dev/ttyUSB2', 'Huawei Technologies Co., Ltd. Modem/Networkcard ',
  'USB VID:PID=12d1:1506'),
 ('/dev/ttyUSB0', 'Huawei Technologies Co., Ltd. Modem/Networkcard ',
  'USB VID:PID=12d1:1506')]

I am study http://pyserial.readthedocs.org/en/latest/tools.html

Please help me how can get usb VID, Usb serial number etc.

Solution

As @Peter said in his comment, in the newer versions of PySerial (current one is 3.4) you can get the port information easily, such as description, PID, VID, HWID, name, serial number, etc.

For example:

for port in serial.tools.list_ports.comports():
    print(port.hwid)

Comments

[Peter]

You could try the newer version of pyserial. In version 3.0.1 serial.tools.list_ports.comports() the returned serial.tools.list_ports.ListPortInfohas attributes pid, vid, and serial_number.

[yogesh kumar]

I am using Django==1.8 Markdown==2.4.1 MySQL-python==1.2.5 Pillow==2.5.3 Pygments==1.6 argparse==1.2.1 bootstrap-admin==0.3.6 django-braces==1.4.0 django-filter==0.7 django-oauth-toolkit==0.7.2 feedparser==5.1.3 gunicorn==19.1.1 oauthlib==0.6.3 pyserial==3.0.1 python-gcm==0.2 requests==2.2.1 six==1.7.3 wsgiref==0.1.2 Then give error:- Traceback (most recent call last): File "/var/www/html/django/sms/test/usb_info.py", line 3, in <module> print serial.tools.list_ports.ListPortInfo AttributeError: 'module' object has no attribute 'ListPortInfo'