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How To Check If A Key in **kwargs Exists?
... - set(args.keys())
if diff:
print("Invalid args:",tuple(diff),file=sys.stderr)
return
args.update(kwargs)
print(args)
The defaults are set in the dictionary args, which includes all the keys we are expecting. We first check to see if there are any unexpec...
How many constructor arguments is too many?
...
Sometimes it is simply not possible. Consider an Excel file with 50 columns that need to be processed. The idea of MyExcelFileLine class having a constructor with 50 arguments is quite scary.
– anar khalilov
Mar 28 '16 at 13:07
...
Bare asterisk in function arguments?
...return a + b
...
>>> f(1, 2)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: f() takes 1 positional argument but 2 were given
>>> f(1, b=2)
3
Pragmatically, it means you have to call the function with a keyword argument. It's usuall...
Coding in Other (Spoken) Languages
...alized, but luckily it's stored in one canonical language (English) in the file, so the localization is just a layer on top of the normal thing. Such things only make sense for small "programs", for "real" programs it becomes hard to maintain.
...
What is a git topic branch?
... another kind of branch which is essentially a completely separate tree of files in the same repository. For example, the Git repository itself contains heads named man and html that contain entirely different content from the master branch. I don't know what these types of branches are usually call...
How does Django's Meta class work?
...rt MyModel >>>MyModel.Meta Traceback (most recent call last): File "<console>", line 1, in <module> AttributeError: type object 'MyModel' has no attribute 'meta'
– bdf
Dec 11 '15 at 17:58
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How can I change property names when serializing with Json.net?
...asy though, just take a sample of your JSON and Paste it into an empty .cs file using "Paste Special" -> "Paste JSON as Classes". -- It's built in to Visual Studio. -- From there, you basically just need to set things up as title case / rename stuff to use .NET naming conventions, etc. (using a t...
What integer hash function are good that accepts an integer hash key?
...entation by Sun of the method hashCode() in java.lang.Integer grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/…
– Juande Carrion
Oct 4 '12 at 16:56
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What is the difference between NULL, '\0' and 0?
...dditionally, to help readability, the macro NULL is provided in the header file stddef.h. Depending upon your compiler it might be possible to #undef NULL and redefine it to something wacky.
Therefore, here are some valid ways to check for a null pointer:
if (pointer == NULL)
NULL is defined to ...
How to parse a string to an int in C++?
... Running out of disk space is an exceptional condition. Malformatted data files which are computer produced are an exceptional condition. But typos in user input are not exceptional. It's good to have a parsing approach which is able to handle normal, non-exceptional parsing failures.
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