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Why does substring slicing with index out of range work?
...ous. In the case of strings, the results appear to be identical because in Python, there's no such thing as an individual character outside of a string. A single character is just a 1-character string.
(For the exact semantics of slicing outside the range of a sequence, see mgilson's answer.)
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Determine the type of an object?
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It might be more Pythonic to use a try...except block. That way, if you have a class which quacks like a list, or quacks like a dict, it will behave properly regardless of what its type really is.
To clarify, the preferred method of "telling...
How do I split a multi-line string into multiple lines?
... empty line) better than split('\n'). Back then (2008) I was just a newbie Pythonista and grepping though my scripts now shows that I too am using splitlines() almost exclusively. I'm therefore deleting my 104-point answer (*sob...*) and will be endorsing this one instead.
– ef...
Input and output numpy arrays to h5py
I have a Python code whose output is a sized matrix, whose entries are all of the type float . If I save it with the extension .dat the file size is of the order of 500 MB. I read that using h5py reduces the file size considerably. So, let's say I have the 2D numpy array named A . How do I ...
How to list imported modules?
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If you want to do this from outside the script:
Python 2
from modulefinder import ModuleFinder
finder = ModuleFinder()
finder.run_script("myscript.py")
for name, mod in finder.modules.iteritems():
print name
Python 3
from modulefinder import ModuleFinder
finder = M...
What does “while True” mean in Python?
...lly have some mechanism for breaking out of the loop early. In the case of Python it's the break statement in the cmd == 'e' case of the sample in your question.
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Convert a python dict to a string and back
... @AJ00200: and the ast.literal_eval alternative I mentioned?. From the Python help: "Safely evaluate an expression node or a string containing a Python expression. The string or node provided may only consist of the following Python literal structures: strings, numbers, tuples, lists, dicts, boo...
Retrieving the output of subprocess.call() [duplicate]
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this page docs.python.org/library/subprocess.html#module-subprocess discourages using subprocess.PIPE, any idea how to overcome this?
– Vladimir Keleshev
Dec 13 '11 at 20:55
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How can I do something like a FlowLayout in Android?
...orizontal_spacing;
}
}
}
}
Example :
text_view.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tool="http://schemas.android.com/tools"
android:layout_width="wrap_content"
and...
Multiprocessing: How to use Pool.map on a function defined in a class?
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This doesn't work in Python 2.7.2 (default, Jun 12 2011, 15:08:59) [MSC v.1500 32 bit (Intel)] on win32
– ubershmekel
Feb 18 '12 at 19:03
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