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Can enums be subclassed to add new elements?
...it - which defeats the point of an enum being a well-known set of values.
If you could tell us more about how you want to use this, we could potentially suggest alternative solutions.
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impro...
How do I use itertools.groupby()?
...tor to iterate over each individual item in that group.
Here's a slightly different example with the same data, using a list comprehension:
for key, group in groupby(things, lambda x: x[0]):
listOfThings = " and ".join([thing[1] for thing in group])
print(key + "s: " + listOfThings + ".")
...
What is the difference between the OAuth Authorization Code and Implicit workflows? When to use each
...rity consideration of implicit flow is that access_code should have short life so it can't be used on server to server. OK, but the refresh token solve this problem. Why we should use an auth_code flow and request access_token by that on server to obtain access_code?
– Mohammad...
Argparse optional positional arguments?
...
Use nargs='?' (or nargs='*' if you will need more than one dir)
parser.add_argument('dir', nargs='?', default=os.getcwd())
extended example:
>>> import os, argparse
>>> parser = argparse.ArgumentParser()
>>> parser.add_arg...
Split list into multiple lists with fixed number of elements
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I have a weird question. For the same case if i convert the data to a sequence, I get a Stream Object. Why is that?
– Rakshith
Jun 23 '16 at 10:26
3...
postgresql - replace all instances of a string within text field
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The Regular Expression Way
If you need stricter replacement matching, PostgreSQL's regexp_replace function can match using POSIX regular expression patterns. It has the syntax regexp_replace(source, pattern, replacement [, flags ]).
I will use flags i...
Android Camera : data intent returns null
...non-null intent only when passing back a thumbnail in the returned Intent. If you pass EXTRA_OUTPUT with a URI to write to, it will return a null intent and the picture is in the URI that you passed in.
You can verify this by looking at the camera app's source code on GitHub:
https://github.com/a...
Semicolons superfluous at the end of a line in shell scripts?
...e are superfluous, since the newline is also a command separator. case specifically needs double semicolons at the end of the last command in each pattern block; see help case for details.
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i...
How to use QueryPerformanceCounter?
...__int64 CounterStart = 0;
void StartCounter()
{
LARGE_INTEGER li;
if(!QueryPerformanceFrequency(&li))
cout << "QueryPerformanceFrequency failed!\n";
PCFreq = double(li.QuadPart)/1000.0;
QueryPerformanceCounter(&li);
CounterStart = li.QuadPart;
}
double GetCou...
What happens if i return before the end of using statement? Will the dispose be called?
...Service Reference / Client Proxy! -- and when that happens it can be very difficult to track down the original exception if Dispose was called during an exception stack unwind, since the original exception gets swallowed in favor of the new exception generated by the Dispose call. It can be maddenin...