大约有 45,000 项符合查询结果（耗时：0.0272秒） [XML]
Better to 'try' something and catch the exception or test if it's possible first to avoid an excepti
...ind an element in a long list by:
try:
x = my_list[index]
except IndexError:
x = 'NO_ABC'
the try, except is the best option when the index is probably in the list and the IndexError is usually not raised. This way you avoid the need for an extra lookup by if index < len(my_list).
Pyt...
std::string formatting like sprintf
... ) + 1; // Extra space for '\0'
if( size <= 0 ){ throw std::runtime_error( "Error during formatting." ); }
std::unique_ptr<char[]> buf( new char[ size ] );
snprintf( buf.get(), size, format.c_str(), args ... );
return std::string( buf.get(), buf.get() + size - 1 ); // We do...
git produces Gtk-WARNING: cannot open display
...dmin rights and after running git push origin master I get the following error message:
4 Answers
...
What is the difference between location list and quickfix list in vim
...he location you jump to with :lne depends on the window you are in but the error you jump to with :cn is always the same (until you replace the current quickfix list with another one).
Both lists have relatively clear roles IMO: the quickfix list (and thus the quickfix window) is usually and quite ...
error: default argument given for parameter 1
I'm getting this error message with the code below:
1 Answer
1
...
Why can't a text column have a default value in MySQL?
...a TEXT column on a table, and give it a default value in MySQL, you get an error (on Windows at least). I cannot see any reason why a text column should not have a default value. No explanation is given by the MySQL documentation. It seems illogical to me (and somewhat frustrating, as I want a defau...
What is the purpose of wrapping whole Javascript files in anonymous functions like “(function(){ … }
...ee in the console
myFunction(); // unreachable, will throw an error, see in the console
myObject.anotherFunc(); // unreachable, will throw an error, see in the console
In the example above, any variable defined in the function (i.e. declared using var) will be "private" and accessi...
Git: “Corrupt loose object”
Whenever I pull from my remote, I get the following error about compression. When I run the manual compression, I get the same:
...
Make sure only a single instance of a program is running
...cntl.LOCK_EX | fcntl.LOCK_NB)
already_running = False
except IOError:
already_running = True
return already_running
A lot like S.Lott's suggestion, but with the code.
share
|
...
How do you test that a Python function throws an exception?
...he assertion; using @Moe's answer above for example: self.assertRaises(TypeError, mymod.myfunc). You can find a full list of the Built-in Exceptions here: docs.python.org/3/library/exceptions.html#bltin-exceptions
– Raymond Wachaga
Feb 7 '19 at 17:51
...