How to append a reading to a python list?
<p>i am using GM862 module and i want to write the cordinates as it is in a file "cordinates.txt" but i get some error, this is the code i wrote:</p>

<pre><code>import MDM

cordlist = []
f = open("cordinates.txt", 'w')

def AcquiredPosition():
  res = MDM.send('AT$GPSACP\r', 0) 
  res = MDM.receive(30)
  if(res.find('OK') != -1):
    tmp = res.split("\r\n")
    res = tmp[1]
    tmp = res.split(" ")
    return tmp[1]
  else:
    return ""

while (1):
    res = MDM.receive(60)
    p = AcquiredPosition()
    cordlist.append(p)
    cordlist.append("\r\n")
    f.writelines(cordlist)
</code></pre>

<p>so the problem that the cordinates are being repeted in the list each time the appened happened.</p>

<p>and this is an example of the file content called "cordinates.txt":</p>

<pre><code>160439.246,2612.7206N,05027.6068E,3.0,23.6,2,339.34,4.21,2.27,181109,03     first time
160439.246,2612.7206N,05027.6068E,3.0,23.6,2,339.34,4.21,2.27,181109,03     repeted1
160445.246,2612.7305N,05027.6079E,3.0,23.6,2,161.61,6.37,3.43,181109,03     first time
160439.246,2612.7206N,05027.6068E,3.0,23.6,2,339.34,4.21,2.27,181109,03     repeted2
160445.246,2612.7305N,05027.6079E,3.0,23.6,2,161.61,6.37,3.43,181109,03     repeted1
160451.246,2612.7634N,05027.5939E,3.0,23.6,2,143.18,1.36,0.73,181109,03     first time
160439.246,2612.7206N,05027.6068E,3.0,23.6,2,339.34,4.21,2.27,181109,03     repeted3
160445.246,2612.7305N,05027.6079E,3.0,23.6,2,161.61,6.37,3.43,181109,03
160451.246,2612.7634N,05027.5939E,3.0,23.6,2,143.18,1.36,0.73,181109,03
160458.246,2612.7471N,05027.5979E,3.0,23.6,2,333.97,7.66,4.13,181109,03
160439.246,2612.7206N,05027.6068E,3.0,23.6,2,339.34,4.21,2.27,181109,03     and so on...
160445.246,2612.7305N,05027.6079E,3.0,23.6,2,161.61,6.37,3.43,181109,03
160451.246,2612.7634N,05027.5939E,3.0,23.6,2,143.18,1.36,0.73,181109,03
160458.246,2612.7471N,05027.5979E,3.0,23.6,2,333.97,7.66,4.13,181109,03
160504.246,2612.7496N,05027.5961E,3.0,47.2,3,316.66,3.16,1.70,181109,04
160439.246,2612.7206N,05027.6068E,3.0,23.6,2,339.34,4.21,2.27,181109,03
160445.246,2612.7305N,05027.6079E,3.0,23.6,2,161.61,6.37,3.43,181109,03
160451.246,2612.7634N,05027.5939E,3.0,23.6,2,143.18,1.36,0.73,181109,03
160458.246,2612.7471N,05027.5979E,3.0,23.6,2,333.97,7.66,4.13,181109,03
160504.246,2612.7496N,05027.5961E,3.0,47.2,3,316.66,3.16,1.70,181109,04
160510.000,2612.7446N,05027.5996E,3.0,53.7,3,162.56,0.50,0.27,181109,04
</code></pre>

<p>thanks for any help.</p>
