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Is there any pythonic way to combine two dicts (adding values for keys that appear in both)?
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842
Use collections.Counter:
>>> from collections import Counter
>>> A = Counter(...
Why would I use a templating engine? jsp include and jstl vs tiles, freemarker, velocity, sitemesh
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answered Jul 2 '10 at 20:18
matt bmatt b
130k6262 gold badges265265 silver badges330330 bronze badges
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How can I ensure that a division of integers is always rounded up?
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UPDATE: This question was the subject of my blog in January 2013. Thanks for the great question!
Getting integer arithmetic correct is hard. As has been demonstrated amply thus far, the moment you try to do a "clever" trick, odds are good that you've made a mistake. And when a fla...
LaTeX Optional Arguments
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Example from the guide:
\newcommand{\example}[2][YYY]{Mandatory arg: #2;
Optional arg: #1.}
This defines \example to be a command with two arguments,
referred to as #1 and #2 in the {<definition>}--nothing new so far.
But by addi...
List comprehension vs. lambda + filter
...able (value). That is slower than accessing a local variable and in Python 2.x the list comprehension only accesses local variables. If you are using Python 3.x the list comprehension runs in a separate function so it will also be accessing value through a closure and this difference won't apply.
T...
python pandas: apply a function with arguments to a series
...w documentation). So now you can do:
my_series.apply(your_function, args=(2,3,4), extra_kw=1)
The positional arguments are added after the element of the series.
For older version of pandas:
The documentation explains this clearly. The apply method accepts a python function which should have ...
SyntaxError: Non-ASCII character '\xa3' in file when function returns '£'
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answered May 14 '12 at 19:16
Silas RaySilas Ray
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Using Case/Switch and GetType to determine the object [duplicate]
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answered Apr 2 '09 at 9:10
Anton GogolevAnton Gogolev
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Regex: match everything but specific pattern
...fic pattern (specifically index.php and what follows, like index.php?id=2342343 )
7 Answers
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builder for HashMap
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Since Java 9 Map interface contains:
Map.of(k1,v1, k2,v2, ..)
Map.ofEntries(Map.entry(k1,v1)...