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What is a mixin, and why are they useful?
In " Programming Python ", Mark Lutz mentions "mixins". I'm from a C/C++/C# background and I have not heard the term before. What is a mixin?
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How can I send an email by Java application using GMail, Yahoo, or Hotmail?
Is it possible to send an email from my Java application using a GMail account? I have configured my company mail server with Java app to send email, but that's not going to cut it when I distribute the application. Answers with any of using Hotmail, Yahoo or GMail are acceptable.
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Writing a compiler in its own language
...sky. As of version 2.0, the compiler was completely re-written in Scala. From that point on, the old Pizza compiler could be completely discarded, due to the fact that the new Scala compiler could be used to compile itself for future iterations.
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How to write a Python module/package?
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would that last one be: from HellowModule import hellomodule? Could that be hello in the module folder, so it would be from HelloModule import hello
– nycynik
Feb 22 '15 at 13:33
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Rails: call another controller action from a controller
I need to call the create action in controller A, from controller B.
9 Answers
9
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What can I do with a moved-from object?
...ndard define precisely what I can do with an object once it has been moved from? I used to think that all you can do with a moved-from object is do destruct it, but that would not be sufficient.
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Import module from subfolder
...rts in a package you should include the "root" packagename as well, e.g.:
from dirFoo.dirFoo1.foo1 import Foo1
from dirFoo.dirFoo2.foo2 import Foo2
Or you can use relative imports:
from .dirfoo1.foo1 import Foo1
from .dirfoo2.foo2 import Foo2
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How to join two generators in Python?
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See @andrew-pate anser for itertools.chain.from_iterable() reference to return a types.GeneratorType instance.
– gkedge
Sep 9 at 13:13
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Run function from the command line
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Alternatively, if you don't care about namespace pollution:
$ python -c 'from foo import *; print hello()'
And the middle ground:
$ python -c 'from foo import hello; print hello()'
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How to import a module given the full path?
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For Python 3.5+ use:
import importlib.util
spec = importlib.util.spec_from_file_location("module.name", "/path/to/file.py")
foo = importlib.util.module_from_spec(spec)
spec.loader.exec_module(foo)
foo.MyClass()
For Python 3.3 and 3.4 use:
from importlib.machinery import SourceFileLoader
foo...