大约有 37,000 项符合查询结果（耗时：0.0215秒） [XML]
How do I correctly clean up a Python object?
...esources that need to be cleaned up. The problem with using an explicit close() statement is that you have to worry about people forgetting to call it at all or forgetting to place it in a finally block to prevent a resource leak when an exception occurs.
To use the with statement, create a class ...
BASH copy all files except one
....png. It seems that there are a number of ways to do this. What seems the most effective to you?
8 Answers
...
What does if __name__ == “__main__”: do?
...ightly different code sample to explore how imports and scripts work. Suppose the following is in a file called foo.py.
# Suppose this is foo.py.
print("before import")
import math
print("before functionA")
def functionA():
print("Function A")
print("before functionB")
def functionB():
p...
do you have kcachegrind like profiling tools for mac [closed]
...
I ended up using qcachegrind on OSX. It can be installed via brew
brew install qcachegrind
or, to enable graphviz support:
brew install qcachegrind --with-graphviz
What's great about this program is that I successfully loaded a 6.1GB cachegrind file o...
background function in Python
...
The interpreter stays open until the thread closes. (example import threading, time; wait=lambda: time.sleep(2); t=threading.Thread(target=wait); t.start(); print('end')). I was hoping "background" implied detached as well.
– ThorSummoner
...
Why do I get a SyntaxError for a Unicode escape in my file path?
...
why triple `\`? Editing typo? Ok now I see post history and someone fixed formatting not carefully enough, so I've fixed that. Please familiarize yourself it with SO features.
– Marek R
Jan 20 at 11:17
...
Difference between a Structure and a Union
...mber and union uses the largest members memory space. Is there any other OS level difference?
15 Answers
...
Bash Script : what does #!/bin/bash mean? [duplicate]
...
When bash is run as sh, it behaves differently (more POSIX-like) than when it is run as bash. Read the manual; it does cover that detail.
– Jonathan Leffler
Dec 14 '12 at 3:14
...
Getting user input [duplicate]
...ny way to write a prompt that can work for both?
– Agostino
Apr 8 '15 at 23:20
5
@Agostino try: i...
How to show the last queries executed on MySQL?
...
For those blessed with MySQL >= 5.1.12, you can control this option globally at runtime:
Execute SET GLOBAL log_output = 'TABLE';
Execute SET GLOBAL general_log = 'ON';
Take a look at the table mysql.general_log
If you prefe...