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How to pull a random record using Django's ORM?
...ld it be slower than retrieving all items and performing randomization in Python?
– muhuk
Jun 8 '09 at 16:24
8
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Converting from longitude\latitude to Cartesian coordinates
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In python3.x it can be done using :
# Converting lat/long to cartesian
import numpy as np
def get_cartesian(lat=None,lon=None):
lat, lon = np.deg2rad(lat), np.deg2rad(lon)
R = 6371 # radius of the earth
x = R * np...
Search for “does-not-contain” on a DataFrame in pandas
... Perfect! I'm SQL-familiar with regex and thought it was different in Python - saw a lot of articles with re.complies and told myself I'd get to that later. Looks like I overfit the search and it's just as you say : )
– stites
Jun 14 '13 at 14:58
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ruby inheritance vs mixins
... Is there any good mitigation for this? This looks like a reason why Python multiple inheritance is a superior solution (not trying to start a language p*ssing match; just comparing this specific feature).
– Marcin
Apr 17 '15 at 14:05
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Skip rows during csv import pandas
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in Python 3: from io import StringIO
– Dima Lituiev
Mar 30 '16 at 18:51
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SVG fill color transparency / alpha?
.... I jumped mentally straight to "how do I implement this using svgwrite in Python". There you need to replace the hyphens with underscores.
– mermaldad
Jun 11 at 0:49
add a co...
What are .NET Assemblies?
...tion.dll
System.Web.dll
System.Data.dll
System.Web.Services.dll
System.Xml.dll
System.Drawing.dll
System.EnterpriseServices.dll
System.Web.Mobile.dll
To use any particular class in the .NET Framework, you must do two things. First, your application must reference the assembly that contains t...
Right way to initialize an OrderedDict using its constructor such that it retains order of initial d
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Generate list of all possible permutations of a string
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Non recursive solution according to Knuth, Python example:
def nextPermutation(perm):
k0 = None
for i in range(len(perm)-1):
if perm[i]<perm[i+1]:
k0=i
if k0 == None:
return None
l0 = k0+1
for i in range(k0+1, len...
Import CSV to mysql table
...irst row of data be used as the column names". (I would prefer a script in Python, so I don't have to install PHP, but it shouldn't be hard to port it.)
– LarsH
Mar 19 '15 at 21:46
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