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Activate a virtualenv via fabric as deploy user
...th Fabric 1.0 you can make use of prefix() and your own context managers.
from __future__ import with_statement
from fabric.api import *
from contextlib import contextmanager as _contextmanager
env.hosts = ['servername']
env.user = 'deploy'
env.keyfile = ['$HOME/.ssh/deploy_rsa']
env.directory = '...
How to remove all line breaks from a string
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When parsing returned data from memcached in node.js using /[\n\r]/g did the trick for me. Thanks Gone Coding! The option in the answer butchered it.
– Kyle Coots
Sep 21 '18 at 3:11
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In Python, how do I read the exif data for an image?
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I use this:
import os,sys
from PIL import Image
from PIL.ExifTags import TAGS
for (k,v) in Image.open(sys.argv[1])._getexif().items():
print('%s = %s' % (TAGS.get(k), v))
or to get a specific field:
def get_field (exif,field) :
for (k,v) i...
VIM: Deleting from current position until a space
...en developing I am confronted with a nested object that I'd like to delete from code in the middle of a line like this:
6 A...
Java Byte Array to String to Byte Array
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You can't just take the returned string and construct a string from it... it's not a byte[] data type anymore, it's already a string; you need to parse it. For example :
String response = "[-47, 1, 16, 84, 2, 101, 110, 83, 111, 109, 101, 32, 78, 70, 67, 32, 68, 97, 116, 97]"; // re...
How to fix: “UnicodeDecodeError: 'ascii' codec can't decode byte”
...hey only hold Unicode point codes and therefore can hold any Unicode point from across the entire spectrum. Strings contain encoded text, beit UTF-8, UTF-16, ISO-8895-1, GBK, Big5 etc. Strings are decoded to Unicode and Unicodes are encoded to strings. Files and text data are always transferred in e...
get client time zone from browser [duplicate]
Is there a reliable way to get a timezone from client browser? I saw the following links but I want a more robust solution.
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explicit casting from super class to subclass
...ever possibly work.
Because you're essentially just stopping the compiler from complaining, every time you cast it's important to check that you won't cause a ClassCastException by using instanceof in an if statement (or something to that effect.)
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Pandas: drop a level from a multi-level column index?
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You can use MultiIndex.droplevel:
>>> cols = pd.MultiIndex.from_tuples([("a", "b"), ("a", "c")])
>>> df = pd.DataFrame([[1,2], [3,4]], columns=cols)
>>> df
a
b c
0 1 2
1 3 4
[2 rows x 2 columns]
>>> df.columns = df.columns.droplevel()
>>...
How to create a memory leak in Java?
...clears all references to the custom class or the ClassLoader it was loaded from.
Repeat.
Due to the way ThreadLocal is implemented in Oracle's JDK, this creates a memory leak:
Each Thread has a private field threadLocals, which actually stores the thread-local values.
Each key in this map is a w...