Hi, Stefan,
Thanks for your help.
First it is my typing error. My command
is:fid=loadtxt('filename.csv',comments='"',dtype='|S4',converters={1:lambdas:int(s,16)},usecols=(1,))
It is not the zero. This will causes the same error as:
In [218]: fid=loadtxt('test.dat',comments='"',dtype='|S4',converters={1:lambda
s:int(s,16)},usecols=(1,))---------------------------------------------------------------------------AttributeError
Traceback (most recent call last)
C:\DHG\DOCSIS\lab_test\parseadc.py in <module>()----> 1 2 3 4
5
C:\Python25\lib\site-packages\numpy\lib\io.pyc in loadtxt(fname, dtype,
comments, delimiter, converters, skiprows, usecols, unpack) 337 for i,
conv in (user_converters or {}).iteritems(): 338 if usecols:--> 339
i = usecols.find(i) 340 converters[i] = conv 341
AttributeError: 'tuple' object has no attribute 'find'>
c:\python25\lib\site-packages\numpy\lib\io.py(339)loadtxt() 338 if
usecols:--> 339 i = usecols.find(i) 340 converters[i] =
conv
This command is the same as yours. I do not know why it is working for you.>
Date: Mon, 22 Sep 2008 22:13:18 +0200> From: [EMAIL PROTECTED]> To:
numpy-discussion@scipy.org> Subject: Re: [Numpy-discussion] loadtxt error> >
2008/9/22 frank wang <[EMAIL PROTECTED]>:> > It will load an array has two
columns. However, I only want to load one> > column to save the memory. If I
type> >> >
fid=loadtxt('filename.csv',comments='"',dtype='|S4',converters={0:lambda> >
s:int(s,16)},usecols=(1,))> > You are specifying a converter that won't be in
the output. I can fix> that, but in the meantime do:> >
np.loadtxt('dat.dat',comments='"',dtype='|S4',converters={1:lambda>
s:int(s,16)},usecols=(1,))> [(565,), (919,)]> |S4> > Regards> Stéfan>
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