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Real world example about how to use property feature in python?
I am interested in how to use @property in Python. I've read the python docs and the example there, in my opinion, is just a toy code:
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Immutable class?
... It is difficult to maintain correctness in mutable objects, as multiple threads could be trying to change the state of the same object, leading to some threads seeing a different state of the same object, depending on the timing of the reads and writes to the said object.
By having an immutable ob...
Getting root permissions on a file inside of vi? [closed]
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Common Caveats
The most common method of getting around the read-only file problem is to open a pipe to current file as the super-user using an implementation of sudo tee. However, all of the most popular solutions that I have found around the Internet have a combination of a several...
Execute command on all files in a directory
...ption of shell to delimit files with this NULL byte using the -d option of read command, we can do below
( shopt -s nullglob; printf '%s\0' ./* ) | while read -rd '' file; do
cmdToRun [option] -- "$file"
done
The nullglob and the printf are wrapped around (..) which means they are basically r...
MySQL maximum memory usage
...mize its behavior. If you run into issues, you really need to sit down and read the (f'ing) manual.
As for the database -- a few important constraints:
table engine (InnoDB, MyISAM, ...)
size
indices
usage
Most MySQL tips on stackoverflow will tell you about 5-8 so called important settings. Fi...
How to fix Error: listen EADDRINUSE while using nodejs?
...means that the port number which listen() tries to bind the server to is already in use.
So, in your case, there must be running a server on port 80 already.
If you have another webserver running on this port you have to put node.js behind that server and proxy it through it.
You should check for...
_csv.Error: field larger than field limit (131072)
I have a script reading in a csv file with very huge fields:
8 Answers
8
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MongoDB - admin user not authorized
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roles: [ { role: 'root', db: 'admin' } ]
}
);
exit;
If you have already created the admin user, you can change the role like this:
use admin;
db.grantRolesToUser('admin', [{ role: 'root', db: 'admin' }])
For a complete authentication setting reference, see the steps I've compiled after h...
Google MAP API Uncaught TypeError: Cannot read property 'offsetWidth' of null
I'm trying to use Google MAP API v3 with the following code.
26 Answers
26
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Build the full path filename in Python
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@wontleave: If a filename already has a suffix, with_suffix() will substitute it instead of appending. You want something like Path(dirname, filename2 + suffix)
– Eugene Yarmash
Jun 28 '19 at 8:46
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