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Why can't non-default arguments follow default arguments?
...s are not. Syntactically, it would be impossible for the interpreter to decide which values match which arguments if mixed modes were allowed. A SyntaxError is raised if the arguments are not given in the correct order:
Let us take a look at keyword arguments, using your function.
def fun1(a="who ...
Are SVG parameters such as 'xmlns' and 'version' needed?
... by every user agent. 4
Removed in SVG 2. 5
1 Internationalized Resource Identifiers (RFC3987)
2 Since HTML5
3 Extensible Markup Language (XML) 1.0
4 Probably until the release of further major versions.
5 SVG 2, W3C Candidate Recommendation, 07 August 2018
...
What's the difference between Application.ThreadException and AppDomain.CurrentDomain.UnhandledExcep
... If such an event handler throws an exception then there's a back-stop inside the Winforms message loop that catches that exception.
That backstop fires the Application.ThreadException event. If you don't override it, the user will get a ThreadExceptionDialog. Which allows him to ignore the ex...
How can I let a table's body scroll but keep its head fixed in place?
...
unfortunately, this method fails when you have a wide table (horizontal scroll). You'll have two horizontal scrollbars; one for the header and one for the data.
– vol7ron
Aug 18 '11 at 21:41
...
List files by last edited date
...g this at the prompt and want to see the most recently modified files, consider ls -lrt[RhA]. the -r reverses the sort order, leaving recently edited stuff at the bottom of the list...
– dmckee --- ex-moderator kitten
Sep 10 '09 at 12:59
...
The difference between try/catch/throw and try/catch(e)/throw e
...e) { ... }
are similar in that both will catch every exception thrown inside the try block (and, unless you are simply using this to log the exceptions, should be avoided). Now look at these:
try { ... }
catch ()
{
/* ... */
throw;
}
try { ... }
catch (Exception e)
{
/* ... */
th...
Define make variable at rule execution time
...TMP/hi.txt ;\
tar -C $$TMP cf $@ . ;\
rm -rf $$TMP ;\
I have consolidated some related tips here: https://stackoverflow.com/a/29085684/86967
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What is the difference between save and export in Docker?
...th containers, while the other works with images.
An image has to be considered as 'dead' or immutable, starting 0 or 1000 containers from it won't alter a single byte. That's why I made a comparison with a system install ISO earlier. It's maybe even closer to a live-CD.
A container "boots" the im...
Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
...td. dev. of 7 runs, 10 loops each)
60x faster than zip
In general, avoid using apply
Apply is generally not much faster than iterating over a Python list. Let's test the performance of a for-loop to do the same thing as above
%%timeit
A1, A2 = [], []
for val in df['a']:
A1.append(val**2)
...
How does zip(*[iter(s)]*n) work in Python?
...from i'th element of each of the input sequences. Since both iterators are identical in our case, zip moves the same iterator twice for each 2-element tuple of output.
In [41]: help(zip)
Help on built-in function zip in module __builtin__:
zip(...)
zip(seq1 [, seq2 [...]]) -> [(seq1[0], seq...