is there a problem on this simple code

[John Machin]

jrlen balane wrote:

[from further down in the message]
> could somebody out there help me.

You could try helping yourself. Insert some print statements at salient
points. [see examples below; you'll need to get the indentation
correct, of course] Try to understand what is happening.

> ok heres the code, i'm trying on IDLE:
>
> import sys
> import serial
> import sys, os
> import serial
> import string
> import time
> from struct import *
>
> data_file = open('C:/Documents and
Settings/nyer/Desktop/IRRADIANCE.txt', 'r')
> data = data_file.readlines()
>
> def process(list_of_lines):
>     data_points = []
>     for line in list_of_lines:
>         data_points.append(int(line))
>     return data_points
>
> irradiance = process(data)
>
> ser = serial.Serial()
> ser.baudrate = 9600
> ser.port = 0
> ser

I'll ask, for the 3rd time, what the @#$% is the above line meant to
achieve?

>
> ser.open()
> tx_command = 67
> tx_no_databyte = 2
> tx_message_no = 1
> tx_len = len (irradiance)
>
> for j in range (tx_len)  :
>     start_time = time.time()
>
>     temp1 = []
>     temp2 = []
>     pyra1 = []
>     pyra2 = []
>     voltage = []
>     current = []
>
>     current_time = time.time()

print 'before while stmt', j, start_time, current time

>
>     while( current_time >= start_time + 300):
>

print 'inside while stmt', j, start_time, current time


>         data_hi, data_lo = divmod(irradiance[j], 0x100)
>         tx_checksum = -(data_hi + data_lo + tx_command +
tx_message_no
> + tx_no_databyte) & 0xff
>         ser.write(pack('6B', tx_command, tx_message_no,
> tx_no_databyte, data_lo, data_hi, tx_checksum))
>
>         rx_data = ser.read(19)
>         rx_len = len(rx_data)
>         byte = [ord(x) for x in rx_data]
>
>         if rx_len < 10:
>             #print 'it is not pumping data out as fast as we assumed'
>             sys.exit(1)
>
>         for k in range (rx_len-9):
>             if byte[k] == 70 and byte [k+2] == 6 and
sum(byte[k:k+10])
> & 0xff == 0:
>                 #print byte[k:k+10]
>
>                 temp1.append(byte[k+3])
>                 temp2.append(byte[k+4])
>                 pyra1.append(byte[k+5])
>                 pyra2.append(byte[k+6])
>                 voltage.append(byte[k+7])
>                 current.append(byte[k+8])
>                 print temp1, temp2, pyra1, pyra2, voltage, current
>
>         current_time = time.time()

print 'after while stmt', j, start_time, current time


>
> while theres no error in the output, there is also no response from
> the hardware or maybe communication is off.
>