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When should iteritems() be used instead of items()?
...to be iterated over, or materialised... So, list(dict.items()) is required for what was dict.items() in Python 2.x.
Python 2.7 also has a bit of a back-port for key handling, in that you have viewkeys, viewitems and viewvalues methods, the most useful being viewkeys which behaves more like a set (w...
Are nested try/except blocks in python a good programming practice?
...oesn't have such attribute") from None
PS. has_key() has been deprecated for a long time in Python 2. Use item in self.dict instead.
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Call static method with reflection
...
As the documentation for MethodInfo.Invoke states, the first argument is ignored for static methods so you can just pass null.
foreach (var tempClass in macroClasses)
{
// using reflection I will be able to run the method as:
tempClass.Get...
In Python, how do I index a list with another list?
...
T = [L[i] for i in Idx]
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How to detect if a script is being sourced
... of the script or on the line after the shebang (which, if used, should be for ksh in order for it to work under the most circumstances).
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Using the Underscore module with Node.js
...object with the result of my function call. Anyone know what's going on? For example, here is a session from the node.js REPL:
...
Capture keyboardinterrupt in Python without try-except
...es, you can install an interrupt handler using the module signal, and wait forever using a threading.Event:
import signal
import sys
import time
import threading
def signal_handler(signal, frame):
print('You pressed Ctrl+C!')
sys.exit(0)
signal.signal(signal.SIGINT, signal_handler)
print(...
Standard way to embed version into python package?
...r__, __version__, etc.
should be placed after the module docstring but before any import
statements except from __future__ imports.
You should also make sure that the version number conforms to the format described in PEP 440 (PEP 386 a previous version of this standard).
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What is the __DynamicallyInvokable attribute for?
...work types run faster. There's a comment about it in the Reference Source for System.Reflection.Assembly.cs, RuntimeAssembly.Flags property:
// Each blessed API will be annotated with a "__DynamicallyInvokableAttribute".
// This "__DynamicallyInvokableAttribute" is a type defined in its own asse...
How to write header row with csv.DictWriter?
...riter(fou, delimiter='\t', fieldnames=dr.fieldnames)
headers = {}
for n in dw.fieldnames:
headers[n] = n
dw.writerow(headers)
for row in dr:
dw.writerow(row)
As @FM mentions in a comment, you can condense header-writing to a one-liner, e.g.:
with open(outfile,'wb'...