Hi pythonians

I am trying to sort a Numpy array by field, but I am having trouble setting up the fields. I think I may have the dtype wrong. I keep getting a TypeError: "expected a readable buffer object".

Here is a sample of the infile:

1480 CL 9 2004 YEB4REDB 49 SY 1 S0111P 1

1142 CL 14 2005 ORA8PURE 10 6Y 0 S0212N 0

1350 CL 72 2006 A4LGLGWH 1 HY 0.1 S0212N 0

442 CL 7 1994 A8WHDBDG 1 HY 0.1 S0212N 0

1096 CL 13 1995 YEA4DGPU 1 HY 0.1 S0212N 0

problem code:

```
from numpy import *
infile = open("C:\Python25\Drew\CL_work\idage.txt", 'r')
outfile= open("CLrcwarray.txt",'w')
rcw = infile.readlines()
bird_a = []
known = []
ct=0 #counts all birds in file
cta=0 #counts birds with ages between 0 and 2 "known ages"
ct1=0 #count for CLrcw creation
ct2=0 #count for CLrcw2 creation
CLrcw=zeros((4813,6),float) #array of all birds
CLrcw2=zeros((2715,6),float)#array of birds with known ages
for record in rcw:
bird = record.strip().split()
ct+=1
age1 = float(bird[7])
if age1 > 0:
cta+=1
infile.close()
infile = open("C:\Python25\Drew\CL_work\idage.txt", 'r')
for record in rcw:
bird = record.strip().split()
nID= float(bird[0])
ter= float(bird[2])
year= float(bird[3])
stat= float(bird[5])
fled= float(bird[9])
age= float(bird[7])
CLrcw[ct1,0]=nID ## Values are assigned to CLrcw array
CLrcw[ct1,1]=ter
CLrcw[ct1,2]=year
CLrcw[ct1,3]=stat
CLrcw[ct1,4]=fled
CLrcw[ct1,5]=age
ct1+=1
if age > 0:
CLrcw2[ct2,0]=nID
CLrcw2[ct2,1]=ter
CLrcw2[ct2,2]=year
CLrcw2[ct2,3]=stat
CLrcw2[ct2,4]=fled
CLrcw2[ct2,5]=age
ct2+=1
infile.close()
for record in CLrcw2:
birdid = record[0]
c_yr = record[2]
c_age = record[5]
for each in CLrcw:
birdid2 = each[0]
age2 = each[5]
if birdid == birdid2 and age2 == 0:
p_yr = each[2]
if c_yr > p_yr:
age3 = c_yr-p_yr+c_age
each[5] = round_(age3,0)
elif c_yr < p_yr:
age3 = p_yr-c_yr+c_age
each[5] = round_(age3,0)
y={'names' : ('nID','ter', 'year','stat','fled','age'),'formats': ('f4','f4','f4','f4','f4','f4')}
x=[('nID',float),('ter',float),('year',float),('stat',float),('fled',float),('age',float)]
CLrcw3 = asarray(CLrcw,dtype=x)
for each in sort(CLrcw3,order=['year']):
set_printoptions(precision=1,suppress=True)
a=str(each) [1:-1]
outfile.writelines("%s \n" %(a))
outfile.close()
```

y and x are the two data types I have tried.

Thanks in advance, this is a great learning website.