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Accessing dict keys like an attribute?
...__init__(*args, **kwargs)
self.__dict__ = self
Some pros:
It actually works!
No dictionary class methods are shadowed (e.g. .keys() work just fine. Unless - of course - you assign some value to them, see below)
Attributes and items are always in sync
Trying to access non-existent key as an...
How do you use bcrypt for hashing passwords in PHP?
...d salts (bcrypt REQUIRES salts) and you can be sure that an attack is virtually unfeasible without either ludicrous amount of funds or hardware.
bcrypt uses the Eksblowfish algorithm to hash passwords. While the encryption phase of Eksblowfish and Blowfish are exactly the same, the key schedule pha...
How can I cast int to enum?
... (e.g. "2342342" -- assuming that's not a value of your enum), it will actually allow that without throwing an error! Your enum will have that value (2342342) even though it's not a valid choice in the enum itself.
– JoeCool
Jun 25 '13 at 15:14
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How to rename with prefix/suffix?
...available and you have to rename more than one file, shell scripting can really be short and simple for this. For example, to rename all *.jpg to prefix_*.jpg in the current directory:
for filename in *.jpg; do mv "$filename" "prefix_$filename"; done;
...
Managing constructors with many parameters in Java
...ing to keep track of any kind of argument order, since any order of those calls will work equally well.
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Manually put files to Android emulator SD card
...o push any file or folder to the mnt/sdcard dir, I had to use storage/12EA-2A1E instead. Probably that folder name is auto-generated for each AVD.
– gosr
Oct 1 '17 at 13:40
ad...
How to get the start time of a long-running Linux process?
... like this command:
ps -eo pid,lstart,cmd
The above command will output all processes, with formatters to get PID, command run, and date+time started.
Example (from Debian/Jessie command line)
$ ps -eo pid,lstart,cmd
PID CMD STARTED
1 Tue Jun 7 01...
How to import a module given the full path?
... path from its cache. In my case I aimed at creating a plugin system where all plugins implement a specific classX. I ended up using SourceFileLoader, note that its deprecation is controversial.
– ComFreek
Jul 3 '15 at 17:18
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Python name mangling
...ld Python guys despise this default - but it is the default anyway, so I really recommend you to follow it, even if you feel uncomfortable.
If you really want to send the message "Can't touch this!" to your users, the usual way is to precede the variable with one underscore. This is just a conventi...
How to select rows from a DataFrame based on column values?
...have multiple values you want to include, put them in a
list (or more generally, any iterable) and use isin:
print(df.loc[df['B'].isin(['one','three'])])
yields
A B C D
0 foo one 0 0
1 bar one 1 2
3 bar three 3 6
6 foo one 6 12
7 foo three 7 14
Note,...