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How can you make a custom keyboard in Android?
I want to make a custom keyboard. I don't know how to do it using XML and Java. The following picture is a model of the keyboard I want to make. It only needs numbers.
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How to import the class within the same directory or sub directory?
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Python 2
Make an empty file called __init__.py in the same directory as the files. That will signify to Python that it's "ok to import from this directory".
Then just do...
from user import User
from dir import Dir
The same holds true if the files are in a sub...
How do exceptions work (behind the scenes) in c++
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Instead of guessing, I decided to actually look at the generated code with a small piece of C++ code and a somewhat old Linux install.
class MyException
{
public:
MyException() { }
~MyException() { }
};
void my_throwing_function(bool throwit)
{
if (throwit)
throw MyExceptio...
How do I filter ForeignKey choices in a Django ModelForm?
...yset attribute. Depends on how your form is built. If you build an explicit form, you'll have fields named directly.
form.rate.queryset = Rate.objects.filter(company_id=the_company.id)
If you take the default ModelForm object, form.fields["rate"].queryset = ...
This is done explicitly in the ...
Asking the user for input until they give a valid response
I am writing a program that accepts an input from the user.
21 Answers
21
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Redirecting to URL in Flask
...tion on flask docs. The default value for code is 302 so code=302 can be omitted or replaced by other redirect code (one in 301, 302, 303, 305, and 307).
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Dynamically set local variable [duplicate]
...ther answers already posted you cannot modify locals() directly and expect it to work.
>>> def foo():
lcl = locals()
lcl['xyz'] = 42
print(xyz)
>>> foo()
Traceback (most recent call last):
File "<pyshell#6>", line 1, in <module>
foo()
File "<p...
Length of generator output [duplicate]
Python provides a nice method for getting length of an eager iterable, len(x) that is. But I couldn't find anything similar for lazy iterables represented by generator comprehensions and functions. Of course, it is not hard to write something like:
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How can I create a copy of an object in Python?
...follow
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edited Dec 14 '18 at 15:35
answered Jan 25 '11 at 13:49
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Instance attribute attribute_name defined outside __init__
I split up my class constructor by letting it call multiple functions, like this:
6 Answers
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