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Xref: csiph.com comp.lang.python:63675

On 2014-01-10 20:57, vanommen.robert@gmail.com wrote:
> Hello,
>
> I have a Raspberry Pi with 10 temperature sensors. I send the data from the sensors and some other values with json encoding and:
>
> result = urllib2.urlopen(request, postData)
>
> to a online PHP script wich places the data in a mysql database.
>
> In the result:
>
> result.read()
>
> i am trying to send data back from the PHP to the RPI. I make an array in PHP
>
> $para[0] = $REGELING_ORG;
> $para[1] = $VLVERWL_ORG;
> $para[2] = $VLOERVRAAG_ORG;
> $para[3] = $TIJDVLOER_ORG;
> $para[4] = $SETPOINT_ORG;
>
> echo $para;
>
> In python when i do
>
> para = result.read()
> print para
>
> the output is:
>
> [null,null,null,null,null,"J"]
>
> This is correct according to the data in PHP from the mysql.
>
> when I do
>
> print para[1]
>
> the output is:
>
> n
>
> the seccond character from the data. Why is this not the seccond datafield?
> And why is para[5] not "J" but ,   ?
>
> How can I change the data back to an array? I've tried with json, but that doesn't change anything.
>
[snip]

What exactly do you mean by "json doesn't change anything"? I get this:

 >>> para = '[null,null,null,null,null,"J"]'
 >>> print para
[null,null,null,null,null,"J"]
 >>> import json
 >>> print json.loads(para)
[None, None, None, None, None, u'J']