[Numpy-discussion] floats coerced to string with {:f}.format() ?

2013-06-06 Thread Maccarthy, Jonathan K
Hi everyone, I've looked in the mailing list archives and with the googles, but haven't yet found any hints with this question... I have a float field in a NumPy record that looks like it's being substituted as a string in the Python {:f}.format() mini-language, thus throwing an error: In

Re: [Numpy-discussion] floats coerced to string with {:f}.format() ?

2013-06-06 Thread Benjamin Root
You can treat a record in a record array like a tuple or a dictionary when it comes to formatting. So, either refer to the index element you want formatted as a float, or refer to it by name (in the formatting language). By just doing {:f}, you are just grabbing the first one, which is XXYYZZ and

Re: [Numpy-discussion] floats coerced to string with {:f}.format() ?

2013-06-06 Thread Robert Kern
On Thu, Jun 6, 2013 at 8:48 PM, Maccarthy, Jonathan K jkm...@lanl.gov wrote: Hi everyone, I've looked in the mailing list archives and with the googles, but haven't yet found any hints with this question... I have a float field in a NumPy record that looks like it's being substituted as a

[Numpy-discussion] ndarray: How to create and initialize with a value other than ones or zeros?

2013-06-06 Thread James Adams
I would like to create an array object and initialize the array's values with an arbitrary fill value, like you can do using the ones() and zeros() creation routines to create and initialize arrays with ones or zeros. Is there an easy way to do this? If this isn't possible then what is the most

Re: [Numpy-discussion] ndarray: How to create and initialize with a value other than ones or zeros?

2013-06-06 Thread Robert Kern
On Thu, Jun 6, 2013 at 8:56 PM, James Adams monoco...@gmail.com wrote: I would like to create an array object and initialize the array's values with an arbitrary fill value, like you can do using the ones() and zeros() creation routines to create and initialize arrays with ones or zeros. Is

Re: [Numpy-discussion] floats coerced to string with {:f}.format() ?

2013-06-06 Thread Maccarthy, Jonathan K
Ah, so np.int64 and np.str inherit the native Python __format__(), but np.float32/64 doesn't get __builtin__.float.__format__(). That's not intuitive, but I see now why this works: In [8]: '{:6.6s} {:8d} {:11.6f}'.format(tmp.sta, tmp.ondate, float(tmp.lat)) Out[8]: 'XYZZ2001123

Re: [Numpy-discussion] floats coerced to string with {:f}.format() ?

2013-06-06 Thread Robert Kern
On Thu, Jun 6, 2013 at 9:18 PM, Maccarthy, Jonathan K jkm...@lanl.gov wrote: Ah, so np.int64 and np.str inherit the native Python __format__(), but np.float32/64 doesn't get __builtin__.float.__format__(). That's not intuitive, but I see now why this works: In [8]: '{:6.6s} {:8d}

Re: [Numpy-discussion] floats coerced to string with {:f}.format() ?

2013-06-06 Thread Maccarthy, Jonathan K
I'm really showing my ignorance now, I think; so, the old-style fmt % (tuple) must use a different mechanism, and perhaps that's why np.savetxt never choked on a float32 for me before (yes, I am on a 64-bit system). In [8]: type(tmp.lat) Out[8]: numpy.float32 In [9]: '%6s %8i %11.6f' %

Re: [Numpy-discussion] floats coerced to string with {:f}.format() ?

2013-06-06 Thread Robert Kern
On Thu, Jun 6, 2013 at 9:50 PM, Maccarthy, Jonathan K jkm...@lanl.gov wrote: I'm really showing my ignorance now, I think; so, the old-style fmt % (tuple) must use a different mechanism, and perhaps that's why np.savetxt never choked on a float32 for me before (yes, I am on a 64-bit system).

Re: [Numpy-discussion] ndarray: How to create and initialize with a value other than ones or zeros?

2013-06-06 Thread Eric Moore
James Adams wrote: I would like to create an array object and initialize the array's values with an arbitrary fill value, like you can do using the ones() and zeros() creation routines to create and initialize arrays with ones or zeros. Is there an easy way to do this? If this isn't

Re: [Numpy-discussion] request for SWIG numpy.i users

2013-06-06 Thread Egor Zindy
Hi Ralf, Your post comes just on time! I implemented the memory managed arrays and noticed a serious problem with my capsule creation code (post I sent to the list about the update on the 12th of March in reply to Bill Spotz Request code review of numpy.i changes). For some reason, the code I