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python list in sql query as parameter
... cursor.execute(f'SELECT name FROM students WHERE id IN ({','.join('?' for _ in l)})', l). @bobince, you should also remark in your solution that using ? is the safe way to go in terms of avoid SQL injection. There are a lot of answers here that are vulnerable, basically any that concatenates string...
git + LaTeX workflow
... complexity by adding an extra layer of seperation? git [log|show|add] some_file.tex all work, no need to add the constant branch switching here. You can still commit each file on its own if you want.
– rubenvb
Sep 27 '13 at 13:11
...
Failed to install Python Cryptography package with PIP and setup.py
...he
corresponding locations. For example:
C:\> \path\to\vcvarsall.bat x86_amd64
C:\> set LIB=C:\OpenSSL-1.0.1f-64bit\lib;%LIB%
C:\> set INCLUDE=C:\OpenSSL-1.0.1f-64bit\include;%INCLUDE%
C:\> pip install cryptography
Building cryptography on Linux
cryptography should build very easily on ...
/bin/sh: pushd: not found
... If it's just a oneliner, the following may also work (cd /new_path ; command )
– barney765
Aug 5 '17 at 7:31
...
Usage of protocols as array types and function parameters in swift
...help overcome this limitation in some cases.
struct AnyX {
private let _x: () -> Int
var x: Int { return _x() }
init<T: X>(_ some: T) {
_x = { some.x }
}
}
// Usage Example
struct XY: X {
var x: Int
var y: Int
}
struct XZ: X {
var x: Int
var z: In...
Why Would I Ever Need to Use C# Nested Classes [duplicate]
...like this ...
class A
{
//used to help implement A
class B
{
A m_a;
internal B(A a) { m_a = a; }
...methods of B can access private members of the m_a instance...
}
...etc...
}
... and constructed from a method of A using code like this ...
//create an instance of B, whose ...
How do I specify a single test in a file with nosetests?
I have a file called test_web.py containing a class TestWeb and many methods named like test_something().
6 Answers
...
Array include any value from another array?
....include?(food) }
=> true
Benchmark script:
require "benchmark"
N = 1_000_000
puts "ruby version: #{RUBY_VERSION}"
CHEESES = %w(chedder stilton brie mozzarella feta haloumi).freeze
FOODS = %w(pizza feta foods bread biscuits yoghurt bacon).freeze
Benchmark.bm(15) do |b|
b.report("&, emp...
Create list of single item repeated N times
... mutable empty list, set, or dict, you should do something like this:
list_of_lists = [[] for _ in columns]
The underscore is simply a throwaway variable name in this context.
If you only have the number, that would be:
list_of_lists = [[] for _ in range(4)]
The _ is not really special, but y...
How to set a Django model field's default value to a function call / callable (e.g., a date relative
..., timedelta
class MyModel(models.Model):
# default to 1 day from now
my_date = models.DateTimeField(default=datetime.now() + timedelta(days=1))
This last line is not defining a function; it is invoking a function to create a field in the class.
PRE Django 1.7
Django lets you pass a callable...