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MySQL, better to insert NULL or empty string?
...eep in mind is that NULL might make your codepaths much more difficult. In Python for example most database adapters / ORMs map NULL to None.
So things like:
print "Hello, %(title)s %(firstname) %(lastname)!" % databaserow
might result in "Hello, None Joe Doe!" To avoid it you need something li...
Matplotlib 2 Subplots, 1 Colorbar
...
As a beginner who stumbled across this thread, I'd like to add a python-for-dummies adaptation of abevieiramota's very neat answer (because I'm at the level that I had to look up 'ravel' to work out what their code was doing):
import numpy as np
import matplotlib.pyplot as plt
fig, ((ax1...
What is the fastest or most elegant way to compute a set difference using Javascript arrays?
... later, with ES6's Set object it's quite easy (but still not as compact as python's A - B), and reportedly faster than indexOf for large arrays:
console.clear();
let a = new Set([1, 2, 3, 4]);
let b = new Set([5, 4, 3, 2]);
let a_minus_b = new Set([...a].filter(x => !b.has(x)));
let ...
float64 with pandas to_csv
... programmer. This article below clarifies a bit this subject:
http://docs.python.org/2/tutorial/floatingpoint.html
A classic one-liner which shows the "problem" is ...
>>> 0.1 + 0.1 + 0.1
0.30000000000000004
... which does not display 0.3 as one would expect. On the other hand, if you...
Hidden Features of PHP? [closed]
...used all over the place which results in good CPU cache locality. Perl and Python both use separate language constructs for lists and maps resulting in more copying and potentially confusing transformations.
share
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`if __name__ == '__main__'` equivalent in Ruby
...rom a module that contains a tool I want to continue using separately. In Python I would simply do this:
3 Answers
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UnicodeEncodeError: 'latin-1' codec can't encode character
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I ran into this same issue when using the Python MySQLdb module. Since MySQL will let you store just about any binary data you want in a text field regardless of character set, I found my solution here:
Using UTF8 with Python MySQLdb
Edit: Quote from the above URL...
Pandas - Get first row value of a given column
...['bar'] = 100
In [25]: df['bar'].iloc[0] = 99
/home/unutbu/data/binky/bin/ipython:1: SettingWithCopyWarning:
A value is trying to be set on a copy of a slice from a DataFrame
See the caveats in the documentation: http://pandas.pydata.org/pandas-docs/stable/indexing.html#indexing-view-versus-copy
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Using sphinx with Markdown instead of RST
...result (using XSLT?) to the docutils schema.
You could take some existing python markdown parser that lets you define a custom renderer and make it build docutils node tree.
You could fork the existing RST reader, ripping out everything irrelevant to markdown and changing the different syntaxes (t...
Java Byte Array to String to Byte Array
...rt my byte[] to a string to send, I then expect my web service (written in python) to echo the data straight back to the client.
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