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Knight's Shortest Path on Chessboard
...found using http://en.wikipedia.org/wiki/Dijkstra's_algorithm
Pseudo-code from wikipedia-page:
function Dijkstra(Graph, source):
for each vertex v in Graph: // Initializations
dist[v] := infinity // Unknown distance function from source to v
previous[v] := ...
Can anyone explain python's relative imports?
...
You are importing from package "sub". start.py is not itself in a package even if there is a __init__.py present.
You would need to start your program from one directory over parent.py:
./start.py
./pkg/__init__.py
./pkg/parent.py
./pkg/sub...
Creating a JSON response using Django and Python
...sually use a dictionary, not a list to return JSON content.
import json
from django.http import HttpResponse
response_data = {}
response_data['result'] = 'error'
response_data['message'] = 'Some error message'
Pre-Django 1.7 you'd return it like this:
return HttpResponse(json.dumps(response_d...
Can I access constants in settings.py from templates in Django?
I have some stuff in settings.py that I'd like to be able to access from a template, but I can't figure out how to do it. I already tried
...
Making heatmap from pandas DataFrame
I have a dataframe generated from Python's Pandas package. How can I generate heatmap using DataFrame from pandas package.
...
Read and write a String from text file
I need to read and write data to/from a text file, but I haven't been able to figure out how.
21 Answers
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Why does Python print unicode characters when the default encoding is ASCII?
From the Python 2.6 shell:
6 Answers
6
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What's the correct way to sort Python `import x` and `from x import y` statements?
...sorting.So its all about choice what you use.
According to few references from reputable sites and repositories also popularity, Alphabetical ordering is the way.
for eg like this:
import httplib
import logging
import random
import StringIO
import time
import unittest
from nova.api import opensta...
Difference between break and continue statement
...reak
You can label a block, not only a for-loop, and then break/continue from a nested block to an outer one. In few cases this might be useful, but in general you'll try to avoid such code, except the logic of the program is much better to understand than in the following example:
first:
for (in...
Why are these numbers not equal?
...E(all.equal(0.1+0.1, 0.15))
#[1] FALSE
Some more detail, directly copied from an answer to a similar question:
The problem you have encountered is that floating point cannot represent decimal fractions exactly in most cases, which means you will frequently find that exact matches fail.
while R ...