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How to filter Pandas dataframe using 'in' and 'not in' like in SQL
...andas as pd
>>> df
country
0 US
1 UK
2 Germany
3 China
>>> countries_to_keep
['UK', 'China']
>>> df.country.isin(countries_to_keep)
0 False
1 True
2 False
3 True
Name: country, dtype: bool
>>> df[df.country.isin(countries_to_ke...
Python Dictionary Comprehension
...t; d = {n: n**2 for n in range(5)}
>>> print d
{0: 0, 1: 1, 2: 4, 3: 9, 4: 16}
If you want to set them all to True:
>>> d = {n: True for n in range(5)}
>>> print d
{0: True, 1: True, 2: True, 3: True, 4: True}
What you seem to be asking for is a way to set multiple ke...
Get operating system info
...t 10/i' => 'Windows 10',
'/windows nt 6.3/i' => 'Windows 8.1',
'/windows nt 6.2/i' => 'Windows 8',
'/windows nt 6.1/i' => 'Windows 7',
'/windows nt 6.0/i' =>...
Fastest way to check if a string matches a regexp in ruby?
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answered Mar 16 '17 at 12:30
Wiktor StribiżewWiktor Stribiżew
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...
Auto-center map with multiple markers in Google Maps API v3
This is what I use to display a map with 3 pins/markers:
7 Answers
7
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How to assert two list contain the same elements in Python? [duplicate]
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163
As of Python 3.2 unittest.TestCase.assertItemsEqual(doc) has been replaced by unittest.TestCase....
How to get a specific output iterating a hash in Ruby?
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328
hash.each do |key, array|
puts "#{key}-----"
puts array
end
Regarding order I should add...
Comparing two dictionaries and checking how many (key, value) pairs are equal
... |
edited Jun 14 '18 at 13:15
Olivier Melançon
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...
Regular expression to match standard 10 digit phone number
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^(\+\d{1,2}\s)?\(?\d{3}\)?[\s.-]\d{3}[\s.-]\d{4}$
Matches the following
123-456-7890
(123) 456-7890
123 456 7890
123.456.7890
+91 (123) 456-7890
If you do not want a match on non-US numbers use
^(\+0?1\s)?\(?\d{3}\)?[\s.-]\d{3}[\s.-]\d{4}$
...
while (1) vs. while(True) — Why is there a difference (in python 2 bytecode)?
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3 Answers
3
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