大约有 44,000 项符合查询结果（耗时：0.0712秒） [XML]
Can Python print a function definition?
...
If you are importing the function, you can use inspect.getsource:
>>> import re
>>> import inspect
>>> print inspect.getsource(re.compile)
def compile(pattern, flags=0):
"Compile a regular expr...
How can I use redis with Django?
...This is usually done by setting a TTL for the key: redis.io/commands/ttl . If the key expires, you must go to the DB. So if the key is in redis, then you use it. Note that the simple implementation of this causes some problems: when a popular key expires you have en.wikipedia.org/wiki/Thundering_her...
Django template how to look up a dictionary value with a variable
...ue in a Django template is {{ mydict.key1 }} , {{ mydict.key2 }} . What if the key is a loop variable? ie:
8 Answers
...
how perform grep operation on all files in a directory
...ld be sufficient. By default, grep would skip all subdirectories. However, if you want to grep through them, grep -r $PATTERN * is the case.
share
|
improve this answer
|
fol...
libevent+protobuf轻松搭建tcpserver - C/C++ - 清泛网 - 专注C/C++及内核技术
...client_t *client = (client_t*)opaque;
size_t rdsz;
int sz;
if (client->total_len <= client->cur_size) {
// 读新请求
// 获得新请求的总长度
rdsz = bufferevent_read(ev_buf, &sz, sizeof(int));
client->total_len = sz;
// 开始读...
Call static method with reflection
...
You may want to add BindingFlags.FlattenHierarchy if the method resides in an ancestor class.
– J. Ouwehand
Jun 8 '19 at 14:51
add a comment
...
Read values into a shell variable from a pipe
...
Use
IFS= read var << EOF
$(foo)
EOF
You can trick read into accepting from a pipe like this:
echo "hello world" | { read test; echo test=$test; }
or even write a function like this:
read_from_pipe() { read "$@" <&a...
Use rvmrc or ruby-version file to set a project gemset with RVM?
I use RVM, the Ruby Version Manager to specify a Ruby version and a set of gems for each of my Rails projects.
5 Answers
...
How to change plot background color?
...fig.add_subplot(1, 1, 1) # nrows, ncols, index
You used the stateful API (if you're doing anything more than a few lines, and especially if you have multiple plots, the object-oriented methods above make life easier because you can refer to specific figures, plot on certain axes, and customize eith...
Deleting folders in python recursively
... directory = Path(directory)
for item in directory.iterdir():
if item.is_dir():
rmdir(item)
else:
item.unlink()
directory.rmdir()
rmdir(Path("dir/"))
share
|
...