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Generating an MD5 checksum of a file
...on't be able to fit the whole file in memory. In that case, you'll have to read chunks of 4096 bytes sequentially and feed them to the md5 method:
import hashlib
def md5(fname):
hash_md5 = hashlib.md5()
with open(fname, "rb") as f:
for chunk in iter(lambda: f.read(4096), b""):
...
Split output of command by columns using Bash?
... Linux you could simply do xargs -0n1 </proc/$PID/cmdline | head -n1 or readlink /proc/$PID/exe, but anyhow...
– ephemient
Oct 27 '09 at 16:09
...
How to kill a child process after a given timeout in Bash?
...ut (sudo apt-get install timeout) and use it like: (most Systems have it already installed otherwise use sudo apt-get install coreutils)
timeout 10 ping www.goooooogle.com
If you don't want to download something, do what timeout does internally:
( cmdpid=$BASHPID; (sleep 10; kill $cmdpid) & ...
How do I read image data from a URL in Python?
...ks for that now and does the BytesIO wrapping under the hood. From: pillow.readthedocs.io/en/3.0.x/releasenotes/2.8.0.html
– Vinícius M
Feb 6 at 15:21
...
mongodb, replicates and error: { “$err” : “not master and slaveOk=false”, “code” : 13435 }
... to set "slave okay" mode to let the mongo shell know that you're allowing reads from a secondary. This is to protect you and your applications from performing eventually consistent reads by accident. You can do this in the shell with:
rs.slaveOk()
After that you can query normally from secondari...
How to “comment-out” (add comment) in a batch/cmd?
...ch files are a relic of times long gone, they're clunky and ugly.
You can read more on this website.
EDIT: modified the example a bit to have it contain the elements you are apparently looking for.
share
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'const int' vs. 'int const' as function parameters in C++ and C
...
The trick is to read the declaration backwards (right-to-left):
const int a = 1; // read as "a is an integer which is constant"
int const a = 1; // read as "a is a constant integer"
Both are the same thing. Therefore:
a = 2; // Can't do ...
Can an Android NFC phone act as an NFC tag?
From what I have understood so far, an NFC phone will act as an NFC reader which will read data from an NFC tag. Now my question is, can we switch this around? Can we make an Android NFC phone behave as the tag which an NFC reader will get data from?
...
Can you explain the concept of streams?
...s a representation of a sequence of bytes. Each stream provides means for reading and writing bytes to its given backing store. But what is the point of the stream? Why isn't the backing store itself what we interact with?
...
How can I use pickle to save a dict?
...': 'bar'}
mpu.io.write('filename.pickle', data)
unserialized_data = mpu.io.read('filename.pickle')
Alternative Formats
CSV: Super simple format (read & write)
JSON: Nice for writing human-readable data; VERY commonly used (read & write)
YAML: YAML is a superset of JSON, but easier to rea...