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How to avoid circular imports in Python? [duplicate]
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Doesn't seem to work with submodules import foobar.mod_a and import foobar.mod_b doesn't work like described above.
– Nick
Oct 2 '13 at 0:39
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Numpy - add row to array
...m adding on matrix A
1 2 3
4 5 6
with a row
7 8 9
same usage in np.r_
A= [[1, 2, 3], [4, 5, 6]]
np.append(A, [[7, 8, 9]], axis=0)
>> array([[1, 2, 3],
[4, 5, 6],
[7, 8, 9]])
#or
np.r_[A,[[7,8,9]]]
Just to someone's intersted, if you would like to add...
Python argparse: default value or specified value
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import argparse
parser = argparse.ArgumentParser()
parser.add_argument('--example', nargs='?', const=1, type=int)
args = parser.parse_args()
print(args)
% test.py
Namespace(example=None)
% test.py --example
Namespace(example=1)
% test.py --example 2
Namespace(example=2)
nargs...
Iterating each character in a string using Python
...imply implement an iterator that defines a next() method, and implement an __iter__ method on a class to make it iterable. (the __iter__ of course, should return an iterator object, that is, an object that defines next())
See official documentation
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Django: Get model from string?
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As of Django 3.0, it's AppConfig.get_model(model_name, require_ready=True)
As of Django 1.9 the method is django.apps.AppConfig.get_model(model_name).
-- danihp
As of Django 1.7 the django.db.models.loading is deprecated (to be removed in 1.9) in favor of t...
CURL alternative in Python
...rt urllib2
manager = urllib2.HTTPPasswordMgrWithDefaultRealm()
manager.add_password(None, 'https://app.streamsend.com/emails', 'login', 'key')
handler = urllib2.HTTPBasicAuthHandler(manager)
director = urllib2.OpenerDirector()
director.add_handler(handler)
req = urllib2.Request('https://app.strea...
Disable button in jQuery
My page creates multiple buttons as id = 'rbutton_"+i+"' . Below is my code:
11 Answers
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Replacing spaces with underscores in JavaScript?
I'm trying to use this code to replace spaces with _, it works for the first space in the string but all the other instances of spaces remain unchanged. Anybody know why?
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Checking if form has been submitted - PHP
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For general check if there was a POST action use:
if (!empty($_POST))
EDIT: As stated in the comments, this method won't work for in some cases (e.g. with check boxes and button without a name). You really should use:
if ($_SERVER['REQUEST_METHOD'] == 'POST')
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My attempt at value initialization is interpreted as a function declaration, and why doesn't A a(())
... won't return a pointer to function).
#include <stdio.h>
int eighty_four() {
return 84;
}
int output_result(int callback()) {
printf("Returned: %d\n", callback());
return 0;
}
int main() {
return output_result(eighty_four);
}
As I mentioned, C allows omitting argument nam...