Python PIP is failing on the RedBrick

[xsherlock]

Dear,

 

I need apscheduler for my python program (quite useful bit) but pip is falling on the instalation. How do I make it install it.

 

tf@red-brick:~$ pip install apscheduler

Downloading/unpacking apscheduler

  Cannot fetch index base URL https://pypi.python.org/simple/

  Could not find any downloads that satisfy the requirement apscheduler

Cleaning up...

No distributions at all found for apscheduler

Storing debug log for failure in /home/tf/.pip/pip.log

 

TIA

[borg]

It works for me. You will need to run pip as root however:

 

tf@red-brick:~$ sudo pip install apscheduler                                    
Collecting apscheduler                                                          
  Downloading APScheduler-3.0.1-py2.py3-none-any.whl (47kB)                     
    100% |################################| 49kB 535kB/s                        
Collecting six (from apscheduler)                                               
  Downloading six-1.8.0-py2.py3-none-any.whl                                    
Collecting futures (from apscheduler)                                           
  Downloading futures-2.2.0-py2.py3-none-any.whl                                
Requirement already satisfied (use --upgrade to upgrade): pytz in /usr/lib/pytho
n2.7/dist-packages (from apscheduler)                                           
Collecting tzlocal (from apscheduler)                                           
  Downloading tzlocal-1.1.2.zip                                                 
Installing collected packages: tzlocal, futures, six, apscheduler               
  Running setup.py install for tzlocal                                          
                                                                                
                                                                                
                                                                                
Successfully installed apscheduler-3.0.1 futures-2.2.0 six-1.8.0 tzlocal-1.1.2  
tf@red-brick:~$                                                                 

[xsherlock]

Thanks, It was it as well as misconfigured DNS.

 

but still no success in running the very same software that works fine on same setup when launched from the PC.

 

2015-01-02T18:09:40.316286+0100

-------------------------------------------------------------------------------

Traceback (most recent call last):

  File "Power logger.py", line 20, in <module>

    from apscheduler.schedulers.background import BackgroundScheduler

ImportError: No module named apscheduler.schedulers.background

 

What else could that be? It works in the win7 PC.

#!/usr/bin/env python
# -*- coding: utf-8 -*-  

HOST = "172.16.0.39"
PORT = 4223
UID_lcd = "o73" # Change to your UID
UID_poti = "fwV"
UID_dual_button = "mEa"
UID_dual_relay = "kDz"
UID_voltage = "nNc"
UID_step = "6RsbXm"
UID_temp = "qnM"
UID_nfc = "oEh"

import binascii
import time
import datetime
from datetime import datetime

from apscheduler.schedulers.background import BackgroundScheduler

from tinkerforge.ip_connection import IPConnection
from tinkerforge.bricklet_lcd_20x4 import LCD20x4
from tinkerforge.bricklet_linear_poti import LinearPoti
from tinkerforge.bricklet_dual_button import DualButton
from tinkerforge.bricklet_dual_relay import DualRelay
from tinkerforge.bricklet_voltage_current import VoltageCurrent
from tinkerforge.brick_stepper import Stepper
from tinkerforge.bricklet_temperature import Temperature
from tinkerforge.bricklet_nfc_rfid import NFCRFID

global running_time
running_time=0

def cb_current(current):
    lcd.write_line(1, 0, str(round(current/1000.0,2)) + 'A ')
    voltage = vc.get_voltage()
    lcd.write_line(1, 14, str(round((voltage * current)/1000000.0,2)) + 'W ')

def cb_voltage(voltage):
    lcd.write_line(1, 7, str(round(voltage/1000.0,2)) + 'V ')
    current = vc.get_current()
    lcd.write_line(1, 14, str(round((voltage * current)/1000000.0,2)) + 'W ')

def cb_pressed(i):
    if i==0:
        # datetime.now().strftime('%Y-%m-%d %H:%M:%S')
        log_started = datetime.now().time()
        lcd.write_line(2, 0, 'Logging '  + datetime.now().strftime('%H:%M:%S'))
        
        
        sched.add_job(job_function, 'interval', seconds=1)
        global running_time
        running_time=0
    if i==3:
        lcd.write_line(2, 0, 'Stopped                ' )
        time.sleep(2)
        lcd.write_line(2, 0, '                     ' )
        sched.remove_all_jobs()

def job_function():
    voltage = vc.get_voltage()
    current = vc.get_current()
    global running_time
    print(str(running_time+1)+','+datetime.now().strftime('%H:%M:%S') + ',' + str(round(voltage/1000.0,2)) + ',' + str(round(current/1000.0,2)) + ',' + str(round((voltage * current)/1000000.0,2)))
    
    running_time=running_time+1
       

if __name__ == "__main__":
    ipcon = IPConnection() # Create IP connection
    lcd = LCD20x4(UID_lcd, ipcon) # Create device object
    poti = LinearPoti(UID_poti, ipcon)
    db = DualButton(UID_dual_button, ipcon) # Create device object
    dr = DualRelay(UID_dual_relay, ipcon)
    vc = VoltageCurrent(UID_voltage, ipcon)
    stepper = Stepper(UID_step, ipcon)
    t = Temperature(UID_temp, ipcon)
    nfc = NFCRFID(UID_nfc, ipcon)
    ipcon.connect(HOST, PORT) # Connect to brickd Don't use device before ipcon is connected
    
    sched = BackgroundScheduler()
    sched.start()
    
    
    lcd.backlight_on()# Turn backlight on     # Write "Hello World"
    lcd.register_callback(lcd.CALLBACK_BUTTON_PRESSED, cb_pressed)
  
    
    vc.set_current_callback_period(1000)
    vc.register_callback(vc.CALLBACK_CURRENT, cb_current)
    vc.set_voltage_callback_period(1000)
    vc.register_callback(vc.CALLBACK_VOLTAGE, cb_voltage)
    current = vc.get_current()
    voltage = vc.get_voltage()
    
    lcd.clear_display()
    lcd.write_line(0, 0, 'Curr   Volt   Power  ')
    lcd.write_line(1, 0, str(round(current/1000.0,2)) + 'A ')
    lcd.write_line(1, 7, str(round(voltage/1000.0,2)) + 'V ')
    lcd.write_line(1, 14, str(round((voltage * current)/1000000.0,2)) + 'W ')
    lcd.write_line(3, 0, 'Start           Stop')  
    
    input('Press key to exit\n') # Use input() in Python 3

    ipcon.disconnect()

 

[borg]

Mhh, i am not sure, again it works for me:

 

tf@red-brick:~$ python
Python 2.7.3 (default, Mar 14 2014, 17:55:54) 
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from apscheduler.schedulers.background import BackgroundScheduler
>>> 

 

No errors.

[xsherlock]

Indeed when running the import from the python shell I also dont see the error. Just the software will not run if uploaded with the BrickV

 

If I ssh into the brick and run it manualy in the terminal it will start fine. but then it will crash when i start a tread (with the scheduler)

 

It looks  that it half-works on the pytnon 2.7.3 but not on the 3.2.3

and my development PC has version 3.4.1. Is there a way to upgrade the python verison on the brick.

[borg]

Can you make a minimal example that crashes, so i can try to get it running?

 

It is possible to install Python 3.4 on Debian Wheezy (which we are using), but it is a bit of a hassle: http://www.extellisys.com/articles/python-on-debian-wheezy

[xsherlock]

on the image 1.5 it works!

 

I install apsscheduler with

sudo pip install apscheduler

 

and then it work with python ver 2.7.8 and that is what I do not understand why it does not work with 3.4.2.

 

Do I need to instal apscheduler separately to 3.4.2 in the terminal?

 

Maciej

[photron]

If you installed apscheduler using pip, it'll probably be installed for Python2 only.

 

Try installing it using pip3:

 

sudo pip3 install apscheduler