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Unpacking a list / tuple of pairs into two lists / tuples [duplicate]
... To the OP, stackoverflow.com/questions/5239856/foggy-on-asterisk-in-python is helpful if you don't know about the "splat" operator.
– dicato
Sep 26 '11 at 18:07
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Negative list index? [duplicate]
... the end of the list, so n[-1] means the last item in the list n. Any good Python tutorial should have told you this.
It's an unusual convention that only a few other languages besides Python have adopted, but it is extraordinarily useful; in any other language you'll spend a lot of time writing n[...
numpy matrix vector multiplication [duplicate]
...pected, but I simply cannot find any information about how this is done in Python's Numpy module.
1 Answer
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How to get a complete list of object's methods and attributes?
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That is why the new __dir__() method has been added in python 2.6
see:
http://docs.python.org/whatsnew/2.6.html#other-language-changes (scroll down a little bit)
http://bugs.python.org/issue1591665
sh...
Read an Excel file directly from a R script
...to have Perl installed on your system -- usually already true on MacOS and Linux, but takes an extra step on Windows, i.e. see http://strawberryperl.com/). There are various caveats, and alternatives, listed on the R wiki page.
The only reason I see not to do this directly is that you may want to e...
Python base64 data decode
I have the following piece of base64 encoded data, and I want to use python base64 module to extract information from it. It seems that module does not work. Can anyone tell me how?
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How do I return multiple values from a function? [closed]
...;>> p.x, p.y
1 2
>>> p[0], p[1]
1 2
In recent versions of Python 3 (3.6+, I think), the new typing library got the NamedTuple class to make named tuples easier to create and more powerful. Inheriting from typing.NamedTuple lets you use docstrings, default values, and type annotation...
jsonify a SQLAlchemy result set in Flask [duplicate]
I'm trying to jsonify a SQLAlchemy result set in Flask/Python.
15 Answers
15
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Dynamic instantiation from string name of a class in dynamically imported module?
In python, I have to instantiate certain class, knowing its name in a string, but this class 'lives' in a dynamically imported module. An example follows:
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Command line progress bar in Java
... Is this really cross-platform ? It will probably behave ok on Windows and Linux, but what about Macs ? I don't have one, so I can't try it...
– Radu Murzea
Jun 8 '13 at 15:04
3
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