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How can I check if my python object is a number? [duplicate]
...t;> import numbers
>>> import decimal
>>> [isinstance(x, numbers.Number) for x in (0, 0.0, 0j, decimal.Decimal(0))]
[True, True, True, True]
This uses ABCs and will work for all built-in number-like classes, and also for all third-party classes if they are worth their salt (re...
Can you split a stream into two streams?
...
Not exactly. You can't get two Streams out of one; this doesn't make sense -- how would you iterate over one without needing to generate the other at the same time? A stream can only be operated over once.
However, if you want ...
How to deal with floating point number precision in JavaScript?
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What is the best way to get all the divisors of a number?
...actors)
f = [0] * nfactors
while True:
yield reduce(lambda x, y: x*y, [factors[x][0]**f[x] for x in range(nfactors)], 1)
i = 0
while True:
f[i] += 1
if f[i] <= factors[i][1]:
break
f[i] = 0
i += 1
...
How to convert list of tuples to multiple lists?
...n conjunction with the * operator can be used to unzip a list:
Specific example:
>>> zip((1,3,5),(2,4,6))
[(1, 2), (3, 4), (5, 6)]
>>> zip(*[(1, 2), (3, 4), (5, 6)])
[(1, 3, 5), (2, 4, 6)]
Or, if you really want lists:
>>> map(list, zip(*[(1, 2), (3, 4), (5, 6)]))
[[...
Generic deep diff between two objects
...Function(obj2)) {
throw 'Invalid argument. Function given, object expected.';
}
if (this.isValue(obj1) || this.isValue(obj2)) {
return {
type: this.compareValues(obj1, obj2),
data: obj1 === undefined ? obj2 : obj1
};
}
var diff = {...
Why use static_cast(x) instead of (int)x?
...that the object is actually the descendant that you claim it is, by means external to the language (like a flag in the object). A dynamic_cast<>() is safe as long as the result is checked (pointer) or a possible exception is taken into account (reference).
A reinterpret_cast<>() (or a ...
Fitting empirical distribution to theoretical ones with Scipy (Python)?
...least SSE between the distribution's histogram and the data's histogram.
Example Fitting
Using the El Niño dataset from statsmodels, the distributions are fit and error is determined. The distribution with the least error is returned.
All Distributions
Best Fit Distribution
Example Code
...
How to use base class's constructors and assignment operator in C++?
...
You can explicitly call constructors and assignment operators:
class Base {
//...
public:
Base(const Base&) { /*...*/ }
Base& operator=(const Base&) { /*...*/ }
};
class Derived : public Base
{
int additional...
decorators in the python standard lib (@deprecated specifically)
... reset filter
return func(*args, **kwargs)
return new_func
# Examples
@deprecated
def some_old_function(x, y):
return x + y
class SomeClass:
@deprecated
def some_old_method(self, x, y):
return x + y
Because in some interpreters the first solution exposed (without...