大约有 6,261 项符合查询结果（耗时：0.0146秒） [XML]
Are static class variables possible in Python?
...gt;> X.bar = 0
>>> x = X()
>>> x.bar
0
>>> x.foo
Traceback (most recent call last):
File "<interactive input>", line 1, in <module>
AttributeError: X instance has no attribute 'foo'
>>> X.foo = 1
>>> x.foo
1
And class instances can chan...
Can Flask have optional URL parameters?
...rstand how to build the URL properly. You can get something like /page?arg=foo where it should be /foo/page . @Audrius Kažukauskas answer works in that case, but this doesn't
– rgargente
Nov 12 '19 at 16:08
...
How to assign the output of a Bash command to a variable? [duplicate]
...erforms globbing on these words. Always double-quote variable expansions "$foo" and command substitutions "$(foo)" (unless you specifically know you have not to).
In the general case, as other answers have mentioned already:
You can't use whitespace around the equal sign in an assignment: var=val...
How to find out where a function is defined?
...PHP 5):
one-liner to print the filename:
print (new ReflectionFunction("foo"))->getFileName();
Please note that it won't show you the location for internal functions (such as _), but it still can print the API for it as below.
to print the definition and parameters of the function:
print...
Initializing multiple variables to the same value in Java
...
Way too late to this but the simplest way I've found is:
String foo = bar = baz = "hello"
println(foo)
println(bar)
println(baz)
Output:
hello
hello
hello
Finding Key associated with max Value in a Java Map
...Or just the entry containing both, of course.)
For example:
Map.Entry<Foo, Bar> maxEntry = null;
for (Map.Entry<Foo, Bar> entry : map.entrySet())
{
if (maxEntry == null || entry.getValue().compareTo(maxEntry.getValue()) > 0)
{
maxEntry = entry;
}
}
...
How can I change or remove HTML5 form validation default error messages?
...
When I set a title to "foo" I get "Please match the requested format. foo", so this won't work for me
– Daan
Mar 26 '14 at 8:35
...
Highlight bash/shell code in markdown
...e), then the right identifier to use at the moment is console:
```console
foo@bar:~$ whoami
foo
```
share
|
improve this answer
|
follow
|
...
python: Change the scripts working directory to the script's own directory
...o so that opening relative paths will work:
import os
os.chdir("/home/udi/foo")
However, you asked how to change into whatever directory your Python script is located, even if you don't know what directory that will be when you're writing your script. To do this, you can use the os.path function...
When to wrap quotes around a shell variable?
...rm token splitting and/or wildcard expansion.
Token splitting;
$ words="foo bar baz"
$ for word in $words; do
> echo "$word"
> done
foo
bar
baz
By contrast:
$ for word in "$words"; do echo "$word"; done
foo bar baz
(The loop only runs once, over the single, quoted string.)
...