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how do you filter pandas dataframes by multiple columns

...sub-statements with (): males = df[(df[Gender]=='Male') & (df[Year]==2014)] To store your dataframes in a dict using a for loop: from collections import defaultdict dic={} for g in ['male', 'female']: dic[g]=defaultdict(dict) for y in [2013, 2014]: dic[g][y]=df[(df[Gender]==g) & ...
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Forward function declarations in a Bash or a Shell script?

...n Kugelman 292k6262 gold badges455455 silver badges506506 bronze badges 3 ...
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Use of an exclamation mark in a Git commit message via the command line

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How do I check if a number evaluates to infinity?

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How to center a button within a div?

I have a div that's width is 100%. 14 Answers 14 ...
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Why is the .bss segment required?

... 90 The reason is to reduce program size. Imagine that your C program runs on an embedded system, wh...
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XML Validation with XSD in Visual Studio IDE

... answered Jul 1 '10 at 20:44 marc_smarc_s 650k146146 gold badges12251225 silver badges13551355 bronze badges ...
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Get element at specified position - JavaScript

... | edited Oct 20 '14 at 16:00 Andrés Morales 77377 silver badges2020 bronze badges answered ...
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How can I copy & paste, or duplicate, an existing project?

... answered Jun 28 '10 at 15:06 Thomas LötzerThomas Lötzer 21.7k1616 gold badges6363 silver badges5454 bronze badges ...
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How to format time since xxx e.g. “4 minutes ago” similar to Stack Exchange sites

...ction timeSince(date) { var seconds = Math.floor((new Date() - date) / 1000); var interval = seconds / 31536000; if (interval > 1) { return Math.floor(interval) + " years"; } interval = seconds / 2592000; if (interval > 1) { return Math.floor(interval) + " months"; } ...