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Access an arbitrary element in a dictionary in Python
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On Python 3, non-destructively and iteratively:
next(iter(mydict.values()))
On Python 2, non-destructively and iteratively:
mydict.itervalues().next()
If you want it to work in both Python 2 and 3, you can use the six pack...
input() error - NameError: name '…' is not defined
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TL;DR
input function in Python 2.7, evaluates whatever your enter, as a Python expression. If you simply want to read strings, then use raw_input function in Python 2.7, which will not evaluate the read strings.
If you are using Python 3.x, raw_inp...
How to create a file with a given size in Linux?
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Please, modern is easier, and faster. On Linux, (pick one)
truncate -s 10G foo
fallocate -l 5G bar
It needs to be stated that truncate on a file system supporting sparse files will create a sparse file and fallocate will not. A sparse file is one where the alloca...
Scoping in Python 'for' loops
I'm not asking about Python's scoping rules; I understand generally how scoping works in Python for loops. My question is why the design decisions were made in this way. For example (no pun intended):
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Python: Why is functools.partial necessary?
...g those "familiar with" (etc) yet think of lambda as an eyesore anomaly in Python...
He was repentant of ever having accepted it into Python whereas planned to remove it from Python 3, as one of "Python's glitches".
I fully supported him in that. (I love lambda in Scheme... while its limitations in...
Python in Xcode 4+?
How does one create a Python friendly environment in Xcode 4, 5, 6 or 7?
8 Answers
8
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How do you create a daemon in Python?
...entation of PEP 3143 (Standard daemon process library) is now available as python-daemon.
Historical answer
Sander Marechal's code sample is superior to the original, which was originally posted in 2004. I once contributed a daemonizer for Pyro, but would probably use Sander's code if I had to do...
Python class inherits object
... Is there any reason for a class declaration to inherit from object?
In Python 3, apart from compatibility between Python 2 and 3, no reason. In Python 2, many reasons.
Python 2.x story:
In Python 2.x (from 2.2 onwards) there's two styles of classes depending on the presence or absence of ob...
TypeError: 'NoneType' object is not iterable in Python
...nded here is totally to skip the for loop instead of raising an exception. Python's design is flawed here. When None is treated as an iterable it must return empty list at least. This exception never helped anyone in real life other than making us insert few ugly if data is not None: kind of handl...
How do I programmatically determine operating system in Java?
...switch (ostype) {
case Windows: break;
case MacOS: break;
case Linux: break;
case Other: break;
}
The helper class is:
/**
* helper class to check the operating system this Java VM runs in
*
* please keep the notes below as a pseudo-license
*
* http://stackoverflow.com/questi...