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Input and output numpy arrays to h5py
I have a Python code whose output is a sized matrix, whose entries are all of the type float . If I save it with the extension .dat the file size is of the order of 500 MB. I read that using h5py reduces the file size considerably. So, let's say I have the 2D numpy array named A . How do I ...
What is the purpose and use of **kwargs?
What are the uses for **kwargs in Python?
13 Answers
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XMLHttpRequest Origin null is not allowed Access-Control-Allow-Origin for file:/// to file:/// (Serv
...n be as trivial as cding into the directory the files are in and running:
python -m SimpleHTTPServer
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Why is early return slower than else?
...88136 which reduced modulo 32 is 8 so there's a collision. To resolve this Python calculates:
Starting with:
j = hash % 32
perturb = hash
Repeat this until we find a free slot:
j = (5*j) + 1 + perturb;
perturb >>= 5;
use j % 2**i as the next table index;
which gives it 17 to use as the ...
correct way to use super (argument passing)
So I was following Python's Super Considered Harmful , and went to test out his examples.
3 Answers
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How to print the full traceback without halting the program?
...t_exc, in some corner cases, you will not obtain what you would expect. In Python 2.x:
import traceback
try:
raise TypeError("Oups!")
except Exception, err:
try:
raise TypeError("Again !?!")
except:
pass
traceback.print_exc()
...will display the traceback of the ...
Method Resolution Order (MRO) in new-style classes?
In the book Python in a Nutshell (2nd Edition) there is an example which uses
old style classes to demonstrate how methods are resolved in classic resolution order and
how is it different with the new order.
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How to access a dictionary element in a Django template?
...thanks @john ewart, your solution worked for me. I am newbie to django and python and can't figureout how to get the sql that ORM generated.
– Mohamed
Aug 14 '09 at 8:27
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Checking if a double (or float) is NaN in C++
...ually in std::tr1:: namespace, though many implementations (i.e. GCC 4+ on Linux or in XCode on Mac OS X 10.5+) inject them directly to std::, so std::isnan is well defined.
Moreover, some implementations of C++ still make C99 isnan() macro available for C++ (included through cmath or math.h), what...
django MultiValueDictKeyError error, how do I deal with it
...dded to that is the slow-down. I don't know the details of how it works in Python, but I would imagine an expensive stack-trace would be involved.
– Joe
May 5 '11 at 9:53
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