大约有 15,000 项符合查询结果（耗时：0.0346秒） [XML]
How do I make python wait for a pressed key?
...wait for a key press.
Additional info:
in Python 3 raw_input() does not exist
In Python 2 input(prompt) is equivalent to eval(raw_input(prompt))
share
|
improve this answer
|
...
What does “|=” mean? (pipe equal operator)
...
@A.R.S.: I can't think of a counter-example in Java (maybe if j is volatile?), but I'll take your word for it.
– David Schwartz
Jan 12 '13 at 17:10
...
Python memoising/deferred lookup property decorator
Recently I've gone through an existing code base containing many classes where instance attributes reflect values stored in a database. I've refactored a lot of these attributes to have their database lookups be deferred, ie. not be initialised in the constructor but only upon first read. These attr...
How to call a Parent Class's method from Child Class in Python?
...
Yes, you can, but the OP was asking how to do it without explicitly naming the superclass at the call site (Bar, in this case).
– Adam Rosenfield
Apr 30 '09 at 2:13
...
Getting multiple keys of specified value of a generic Dictionary?
...l version:
using System;
using System.Collections.Generic;
using System.Text;
class BiDictionary<TFirst, TSecond>
{
IDictionary<TFirst, IList<TSecond>> firstToSecond = new Dictionary<TFirst, IList<TSecond>>();
IDictionary<TSecond, IList<TFirst>> se...
How does the Comma Operator work
...aded in C++. The actual behaviour may thus be very different from the one expected.
As an example, Boost.Spirit uses the comma operator quite cleverly to implement list initializers for symbol tables. Thus, it makes the following syntax possible and meaningful:
keywords = "and", "or", "not", "xor"...
Create empty file using python [duplicate]
I'd like to create a file with path x using python. I've been using os.system(y) where y = 'touch %s' % (x) . I've looked for a non-directory version of os.mkdir , but I haven't been able to find anything. Is there a tool like this to create a file without opening it, or using system or popen/...
Why do you need to put #!/bin/bash at the beginning of a script file?
...
It's a convention so the *nix shell knows what kind of interpreter to run.
For example, older flavors of ATT defaulted to sh (the Bourne shell), while older versions of BSD defaulted to csh (the C shell).
Even today (where most systems run bash, the "...
How to loop backwards in python? [duplicate]
...
range() and xrange() take a third parameter that specifies a step. So you can do the following.
range(10, 0, -1)
Which gives
[10, 9, 8, 7, 6, 5, 4, 3, 2, 1]
But for iteration, you should really be using xrange instead. So,
xrange...
\r\n, \r and \n what is the difference between them? [duplicate]
...r = CR (Carriage Return) → Used as a new line character in Mac OS before X
\n = LF (Line Feed) → Used as a new line character in Unix/Mac OS X
\r\n = CR + LF → Used as a new line character in Windows
share
|
...