大约有 47,000 项符合查询结果（耗时：0.0558秒） [XML]
How to open a file using the open with statement
I'm looking at how to do file input and output in Python. I've written the following code to read a list of names (one per line) from a file into another file while checking a name against the names in the file and appending text to the occurrences in the file. The code works. Could it be done bette...
Using the “start” command with parameters passed to the started program
...he argument is null or empty. Supply an argument that is not null or empty and then try the command again
– geotheory
Oct 20 '14 at 12:04
...
What is q=0.5 in Accept* HTTP headers?
...8, en;q=0.7
would mean: "I prefer Danish, but will accept British English and other types of English."
share
|
improve this answer
|
follow
|
...
Return two and more values from a method
... should use code formatting, not text formatting. Indent lines four spaces and the weirdness caused by irb's >> prompt will go away.
– Chris Lutz
Dec 25 '09 at 15:31
4
...
Python UTC datetime object's ISO format doesn't include Z (Zulu or Zero offset)
...
Python datetime objects don't have time zone info by default, and without it, Python actually violates the ISO 8601 specification (if no time zone info is given, assumed to be local time). You can use the pytz package to get some default time zones, or directly subclass tzinfo yourself:...
How to detect the physical connected state of a network cable/connector?
...
grep "" eth0/* is so elegant and easy, thanks! :) With the -s switch grep will not complain about the directories.
– Ray
Apr 10 '15 at 10:17
...
Error “initializer element is not constant” when trying to initialize variable with const
...n error on line 6 (initialize my_foo to foo_init) of the following program and I'm not sure I understand why.
5 Answers
...
Abstract class in Java
...e. This can be useful if you want people to only implement your interface and no others. However, as a general beginner rule of thumb, if your abstract class only has abstract methods, you should probably make it an interface.
The following is illegal:
interface InterfaceB
{
void interfaceMe...
How to un-escape a backslash-escaped string?
...on literal structures: strings, numbers, tuples, lists,
dicts, booleans, and None. (END)
Like this:
>>> import ast
>>> escaped_str = '"Hello,\\nworld!"'
>>> print ast.literal_eval(escaped_str)
Hello,
world!
...
capturing self strongly in this block is likely to lead to a retain cycle
...
__weak MyClass *self_ = self; // that's enough
self.loadingDidFinishHandler = ^(NSArray *receivedItems, NSError *error){
if (!error) {
[self_ showAlertWithError:error];
} else {
self_.items = [NSArray arrayWithArray:receivedItems];
[self_.tableView reloadData];
...