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How can I find the number of arguments of a Python function?

...ms = sig.parameters print(params['kwarg1']) # prints: kwarg1=20 Additionally, you can call len on sig.parameters to also see the number of arguments this function requires: print(len(params)) # 3 Each entry in the params mapping is actually a Parameter object that has further attributes makin...
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Standardize data columns in R

I have a dataset called spam which contains 58 columns and approximately 3500 rows of data related to spam messages. 15 ...
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New Array from Index Range Swift

... Pedantic point, but this isn't really casting the Slice to an Array, but rather creating a new array from a slice. A cast would use the as operator: numbers as Array which would result in an error. – j b Jun 10 '14 at 9...
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How to find the Windows version from the PowerShell command line

...C System Locale : ru;Russian Hotfix(s) : 274 Hotfix(s) Installed.,[01]: KB2849697,[02]: KB2849697,[03]:... Windows 10 output for the same command: OS Name : Microsoft Windows 10 Enterprise N 2016 LTSB OS Version : 10.0.14393 N/A Build 14393 OS Manufacturer ...
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How to get the parent dir location

...bspath doesn't validate anything, so if we're already appending strings to __file__ there's no need to bother with dirname or joining or any of that. Just treat __file__ as a directory and start climbing: # climb to __file__'s parent's parent: os.path.abspath(__file__ + "/../../") That's far less...
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Object of custom type as dictionary key

... You need to add 2 methods, note __hash__ and __eq__: class MyThing: def __init__(self,name,location,length): self.name = name self.location = location self.length = length def __hash__(self): return hash((self.name...
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Hadoop “Unable to load native-hadoop library for your platform” warning

...e native Hadoop library $HADOOP_HOME/lib/native/libhadoop.so.1.0.0 was actually compiled on 32 bit. Anyway, it's just a warning, and won't impact Hadoop's functionalities. Here is the way if you do want to eliminate this warning, download the source code of Hadoop and recompile libhadoop.so.1.0....
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Select distinct values from a table field

...ant any ordering to be applied to a query, not even the default ordering, call order_by() with no parameters. and distinct() in the note where it discusses issues with using distinct() with ordering. To query your DB, you just have to call: models.Shop.objects.order_by().values('city').distinct(...
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Integrating Dropzone.js into existing HTML form with other fields

...in your form with a classname dropzone, and implement dropzone programmatically. HTML : <div id="dZUpload" class="dropzone"> <div class="dz-default dz-message"></div> </div> JQuery: $(document).ready(function () { Dropzone.autoDiscover = false; $("#dZUpl...
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Code Golf - π day

... Yeah, the ( operator alone allowed to shed 6 strokes! – Dan Andreatta Mar 18 '10 at 10:25 add a comment  |  ...