Newbie: EOF Error when making arrays .fromfile

[Case Van Horsen]

Why not use the original file?

import urllib, string, array

data=urllib.urlopen('http://dnijaguar.tripod.com/planet0.dat').readlines()
datapoints=string.split(string.join(data))
coord=array.array('d', map(string.atof, datapoints))

cvh



"Matt Strange" <dnijaguar at yahoo.com> wrote in message
news:33e33d88.0203191243.454d39b8 at posting.google.com...
> hello all, i am very new to python and i'm using v2.2 on a Win98SE
> machine.  i needed to read in double-type data from an ASCII file
> (http://dnijaguar.tripod.com/planet0.dat).  this file contains 3000
> doubles separated by the tab("\t") value.  after reading information
> posted on this newsgroup, i decided that it would be best to first
> translate this ASCII data into a binary file using a c++ program
> (http://dnijaguar.tripod.com/atb.cpp).  then, i could read in this
> binary file (http://dnijaguar.tripod.com/bin0.dat) with the following
> lines of python:
>
> >>> coord = array('d')
> >>> coord.fromfile(open("bin0.dat",'r'),3000)
>
> however, there is a problem.  i recieve the error:
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> EOFError: not enough items in file
>
> and when i type in "coord" from the >>> prompt to see what is stored
> inside it, i see the values listed at the very end of this message;
> i.e. the correct values, but definately not 3000 of them like i
> wanted.  i would appreciate it if someone would tell me the reason i
> am having this problem and the code necessary to fix it (with ASCII or
> binary files). thank you very much for your help.
>
> value of coord shown on command line:
>
> array('d', [100000.0, 10000.0, -10000.0, 99995.0, 10001.0, -9998.0,
> 97469.199999
> 999997, 10493.200000000001, -8994.9799999999996, 94890.199999999997,
> 10969.0, -7
> 986.0299999999997, 92255.0, 11426.4, -6971.3000000000002,
> 89560.100000000006, 11
> 863.4, -5950.9799999999996, 86801.800000000003, 12277.799999999999,
> -4925.369999
> 9999999, 83976.100000000006, 12666.6, -3894.8499999999999,
> 81078.399999999994, 1
> 3026.799999999999, -2859.9699999999998, 78103.5, 13354.6,
> -1821.4400000000001, 7
> 5045.800000000003, 13645.5, -780.21400000000006, 71898.800000000003,
> 13894.20000
> 0000001, 262.42399999999998, 68655.199999999997, 14094.4, 1304.74,
> 65306.5999999
> 99999, 14238.299999999999, 2344.4000000000001, 61843.599999999999,
> 14316.2000000
> 00001, 3378.1500000000001, 58255.099999999999, 14316.299999999999,
> 4401.5, 54528
> .599999999999, 14223.5, 5408.04, 50649.400000000001, 14018.5, 6388.46,
> 46600.699
> 999999997, 13676.4, 7328.8599999999997, 42363.400000000001,
> 13164.299999999999,
> 8207.8999999999996, 37917.5, 12439.6, 8991.7999999999993,
> 33244.199999999997, 11
> 447.799999999999, 9625.9500000000007, 28333.599999999999, 10126.6,
> 10022.7000000
> 00001, 23197.5, 8424.3799999999992, 10051.5, 17877.599999999999,
> 6340.1099999999
> 997, 9557.7600000000002, 12415.1, 3945.0, 8431.9799999999996,
> 6784.3100000000004
> , 1310.78, 6655.5600000000004, 863.47900000000004,
> -1607.8800000000001, 4227.600
> 0000000004, -5535.2299999999996, -5062.9700000000003, 1022.54,
> -12557.1, -9702.5
> 100000000002, -3429.2600000000002, -19426.0, -17103.799999999999,
> -10433.2999999
> 99999, -21219.700000000001, -28053.400000000001, -20689.5,
> -16580.799999999999,
> -38120.0, -30341.599999999999, -9804.4699999999993,
> -46184.900000000001, -38337.
> 099999999999, -2476.6100000000001, -52974.699999999997])