Thingspeak upload with python

testfile.py

#!/usr/bin/env python

# dependency: installed python library python-psutil
# dependency: a library file containing the thingspeak api keys 
# 'thingspeak_keys.py' containing eg:
# RASPBERRY_PI2  = "KEYABCXYZETECETC"

# ======================================================================
import sys
import subprocess as sp
import psutil
import os
import re

# append the relative location to import local modules from
sys.path.append("/path/to/library")

# import my local modules
import thingspeak_keys
import thingspeak

# thingspeak api key & data dictionary
TS_KEY              = thingspeak_keys.RASPBERRY_PI2
thingspeak_data     = {}

# ======================================================================

TEMP_CMD      = [ '/opt/vc/bin/vcgencmd', 'measure_temp' ]
BOOT          = '/boot'
ROOT          = '/'
MEM_CMD       = [ 'free', '-m' ]

# ======================================================================

def get_output(cmd):
    '''
    Runs a subprocess command to check its output
    Returns a byte, therefore needs to be converted to string
    and removal of the trailing '\n'
    '''
    output = sp.check_output(cmd)
    output = output.decode(encoding='UTF-8')                 # convert byte to string
    return output.strip()

def clean_temp(temp_string):
    """
    Extracts the temperature value from the string "temp=47.1'C"
    https://pythex.org/?regex=\Atemp%3D%28\d%2B\.\d%2B%29%27C%24&test_string=temp%3D47.1%27C&ignorecase=0&multiline=0&dotall=0&verbose=0
    """
    tmpval = re.match(r"\Atemp=(\d+\.\d+)'C$", temp_string)
    return tmpval.group(1)

def get_temp():
    """
    This method returns the HD temp
    via the command `/opt/vc/bin/vcgencmd measure_temp`
    Returns a float
    """
    tempval = get_output(TEMP_CMD)
    return clean_temp(tempval)

def get_drive_used(path):
    """
    Method uses the psutil module to determine the usage stats
    psutil.disk_usage('/') returns a psutil object as follows
    >>> sdiskusage(total=7762042880, used=2968965120, free=4380626944, percent=38.2)
    Specifically return the percentage used value.
    Returns a float
    """
    return psutil.disk_usage(path).percent

def get_5min_load_avg():
    """
    Gets the 5 minute load average from the os module
    A tuple is returned with the 3 values
    """
    (one, five, fifteen) = os.getloadavg()
    return five

def get_mem_percent():
    """
    Source: http://pythonhosted.org//psutil/#psutil.virtual_memory
    Method uses the psutil module to determine the memory stats
    psutil.disk_usage('/') returns a psutil object as follows
    >>> svmem(total=2649165824, available=1928642560, percent=27.2, used=2007678976, free=641486848, active=975646720, inactive=912330752, buffers=86536192, cached=1200619520)
    Specifically return the percentage used value.
    That is, the percentage usage calculated as (total - available) / total * 100.
    Returns a float
    """
    return psutil.virtual_memory().percent


# ======================================================================

print(":: Raspi stats......")


# ======================================================================
# field1: read the raspi temp
temp = get_temp()
print("Raspi temperature is: {0}'C".format(temp))


# ======================================================================
# field2: read the used % of /boot
boot = get_drive_used(BOOT)
print("Raspi boot drive usage percentage is: {0}%".format(boot))


# ======================================================================
# field3: read the used % of / drive => root
root = get_drive_used(ROOT)
print("Raspi root drive usage percentage is: {0}%".format(root))


# ======================================================================
# field4: read the 5 min load average => load
load = get_5min_load_avg()
print("Raspi 5 min load avg is: {0}%".format(load))


# ======================================================================
# field5: read the memory in use => mem
# mem = get_mem()
mem = get_mem_percent()
print("Raspi percentage memory used is: {0}%".format(mem))


# ======================================================================
# field6: 

# ======================================================================
# field7:

# ======================================================================
# field8:

# ======================================================================
# populate the thingspeak content dictionary
thingspeak_data['field1'] = temp
thingspeak_data['field2'] = boot
thingspeak_data['field3'] = root
thingspeak_data['field4'] = load
thingspeak_data['field5'] = mem
# thingspeak_data['field6'] = 
# thingspeak_data['field7'] =
# thingspeak_data['field8'] =


# ======================================================================
# POST to thingspeak
print(":: Thinkspeak POST:")
thingspeak.post(TS_KEY, thingspeak_data)

thinkspeak.py

# this is the library file that is imported by another python script
# depends upon the python library 'requests' http://docs.python-requests.org/en/latest/
# see 'testfile.py' for example invocation

THINGSPEAK_URL = 'http://api.thingspeak.com/update'

import requests

# method to post to thingspeak
def post(key, content):

    # create a dictionary with the api key
    key = {'api_key': key}

    # add the content to be posted to the dictionary
    payload = dict(key, **content)

    # post to thingspeak, using the params in the dictionary
    r = requests.post(THINGSPEAK_URL, params=payload)

    # get the response code
    print("Thingspeak POST response:", r.status_code)

    # get the channel entry number
    print("Thingspeak channel entry:", int(r.content))