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How can I make a time delay in Python? [duplicate]
...ly to delay a function from executing. For example:
>>> def party_time():
... print('hooray!')
...
>>> sleep(3); party_time()
hooray!
"hooray!" is printed 3 seconds after I hit Enter.
Example using sleep with multiple threads and processes
Again, sleep suspends your thread...
搭建高可用mongodb集群（四）—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...安装程序包
wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.4.8.tgz
#解压下载的压缩包
tar xvzf mongodb-linux-x86_64-2.4.8.tgz
4、分别在每台机器建立mongos 、config 、 shard1 、shard2、shard3 五个目录。
因为mongos不存储数据，只需要建立...
How do I convert between big-endian and little-endian values in C++?
...n.h and call the following functions:
For 16 bit numbers:
unsigned short _byteswap_ushort(unsigned short value);
For 32 bit numbers:
unsigned long _byteswap_ulong(unsigned long value);
For 64 bit numbers:
unsigned __int64 _byteswap_uint64(unsigned __int64 value);
8 bit numbers (chars) don'...
How do you write tests for the argparse portion of a python module? [closed]
...ou should refactor your code and move the parsing to a function:
def parse_args(args):
parser = argparse.ArgumentParser(...)
parser.add_argument...
# ...Create your parser as you like...
return parser.parse_args(args)
Then in your main function you should just call it with:
parse...
Running unittest with typical test directory structure
...e TestLoader class).
For example for a directory structure like this:
new_project
├── antigravity.py
└── test_antigravity.py
You can just run:
$ cd new_project
$ python -m unittest test_antigravity
For a directory structure like yours:
new_project
├── antigravity
│ ...
Wait for a void async method
...
await Task.Run(() => An_async_void_method_I_can_not_modify_now())
– themefield
Mar 12 '19 at 21:46
...
What does [:] mean?
...ctly create slice() objects. If you need them anyway, NumPy provides the s_ helper as an alternative way to create them.
– Sven Marnach
Apr 7 '14 at 10:20
...
How can I add new keys to a dictionary?
...gnoring the keys
Create a dictionary from two lists
data = dict(zip(list_with_keys, list_with_values))
New to Python 3.5
Creating a merged dictionary without modifying originals:
This uses a new featrue called dictionary unpacking.
data = {**data1, **data2, **data3}
New to Python 3.9...
Best way to use PHP to encrypt and decrypt passwords? [duplicate]
... ' string to be encrypted '; // note the spaces
To Encrypt:
$iv = mcrypt_create_iv(
mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC),
MCRYPT_DEV_URANDOM
);
$encrypted = base64_encode(
$iv .
mcrypt_encrypt(
MCRYPT_RIJNDAEL_128,
hash('sha256', $key, true),
...
Express-js can't GET my static files, why?
... have /styles in your request URL, use:
app.use("/styles", express.static(__dirname + '/styles'));
Look at the examples on this page:
//Serve static content for the app from the "public" directory in the application directory.
// GET /style.css etc
app.use(express.static(__dirname + '/p...