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Installing specific package versions with pip
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You can even use a version range with pip install command. Something like this:
pip install 'stevedore>=1.3.0,<1.4.0'
And if the package is already installed and you want to downgrade it add --force-reinstall like this:
pip install 'stevedore...
How might I convert a double to the nearest integer value?
...ther answers throw OverflowException if the float value is outside the Int range. https://docs.microsoft.com/en-us/dotnet/api/system.convert.toint32?view=netframework-4.8#System_Convert_ToInt32_System_Single_
int result = 0;
try {
result = Convert.ToInt32(value);
}
catch (OverflowException) {
...
List of lists into numpy array
...ck
import numpy as np
np_array = np.empty((0,4), dtype='float')
for i in range(10)
row_data = ... # get row_data as list
np_array = np.vstack((np_array, np.array(row_data)))
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i...
How to lazy load images in ListView in Android
...ntime(24250): java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 0 10-13 09:58:46.768: ERROR/AndroidRuntime(24250): at java.util.Vector.elementAt(Vector.java:331) 10-13 09:58:46.768: ERROR/AndroidRuntime(24250): at java.util.Vector.get(Vector.java:445) 10-13 09:58:46.768: ER...
Most lightweight way to create a random string and a random hexadecimal number
...gt; t1 = timeit.Timer("''.join(random.choice('0123456789abcdef') for n in xrange(30))", "import random")
>>> t2 = timeit.Timer("binascii.b2a_hex(os.urandom(15))", "import os, binascii")
>>> t3 = timeit.Timer("'%030x' % random.randrange(16**30)", "import random")
>>> for t ...
Neo4j - Cypher vs Gremlin query language
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Update from 2018 - given a large range of native index types in modern versions of neo4j, this answer is substantially out of date; neo4j has published performance numbers
– FrobberOfBits
Aug 1 '18 at 18:01
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Is it possible to have multiple statements in a python lambda expression?
...(x[::-1]))))
>>> from random import shuffle
>>> l = list(range(100))
>>> shuffle(l)
>>> f(l)
[84, 58, 7, 99, 17, 14, 60, 35, 12, 56, 26, 48, 55, 40, 28, 52, 31, 39, 43, 96, 64, 63, 54, 37, 79, 25, 46, 72, 10, 59, 24, 68, 23, 13, 34, 41, 94, 29, 62, 2, 50, 32, 11, ...
Is it safe to use -1 to set all bits to true?
... happens is that it repeatedly adds one more than ULONG_MAX until it is in range (6.3.1.3 in the C TC2 draft). In C++ it's the same, just using another way formalizing it (modulo 2^n). It all comes down to mathematical relations.
– Johannes Schaub - litb
Apr 30...
Getting the location from an IP address [duplicate]
...might not even be valid (not assigned to anyone or outside valid public IP range).
– eselk
Apr 16 '14 at 19:32
On thei...
Best way to store date/time in mongodb
...: ISODate("2014-02-10T10:50:57.240Z") }
The native type supports a whole range of useful methods out of the box, which you can use in your map-reduce jobs, for example.
If you need to, you can easily convert Date objects to and from Unix timestamps1), using the getTime() method and Date(milliseco...