# fib.only{%2==0}.firsts{<40_00000}.Sum 
sum(fib() | where(lambda x: x % 2 == 0) | take_while(lambda x: x < 4000000))

from bot import Retriever, llm_reply

from contextlib import suppress
with suppress(FileNotFoundError):

from tenacity import Retrying, stop_after_attempt #AbortSignal
for attempt in Retrying(3):
  with attempt

for i in Retrying(stop=stop_after_attempt(3)):
  with i:
    print(f"🧨炸弹{'真的'*i.retry_state.attempt_number} 要炸了！")
    try: time.sleep(2)  # 按Ctrl+C !
    except:pass
    else: raise Exception("💥！")

swap( (PyLongObject*)PyLong_FromLong(8)->ob_digit[0] , (9)  )

<form hx-put="/contact/1" hx-target="this" hx-swap="outerHTML">

{{ name ? `你好, ${name}` : `请登录` }}

p(
  when(name, {$Y: html`你好 ${name}`, $N: `请登录` })
)
p(
  wKV({ if: name }), html`你好 ${name}`
)

div__id(wSty`${class||'default'}`)
$navbar(wKV({id,class}))

ee.main=({todos=[], tag='good'})=>lets(
  todos(a=> a.only({tag}) ),
  //EQ不需要靠编译和'signal'得出 todos,tag 变更时要做什么，我们不和DOM抢地盘
  x=>$todo()
)

from apscheduler.schedulers.background import BackgroundScheduler

cron = BackgroundScheduler(jobstores=sqlite)
.add_job(print, 'interval', seconds=5)
.start()

with mpire.WorkerPool(n_jobs=5) as pool:
    results = pool.map(getFiles, range(10), progress_bar=True)

importlib.import_module

from lazy import cv2

import types,sys

class lazy(types.ModuleType):
  def __getattr__(self, mod):
    import importlib.util as _
    if None==(r:=sys.modules.get(mod)): 
        id = _.find_spec(mod)
        # get it inserted into sys.modules.
        _.LazyLoader(id.loader).exec_module(r:=_.module_from_spec(id))
    return r

sys.modules['lazy']=lazy('-L imports')

data Equal : a -> b -> Type where
     Refl : Equal x x
fiveIsFive : 5 = 5
fiveIsFive = Refl = Equal 5 5

Refl : Equal

-- showOrRev(isInt, x) when isInt:
  $Y: x.Str ; $N: x.flipLR

Inc=F.QUINE((quote,x)=>(quote`${{x}}+=${1};`, x))
acc=2; dd=Inc[acc]
//dd=Inc.scop(s=>eval(s)).MEMO1(acc)
//dd=((x)=>{x+=1; return 3 })(acc)

//展开结果
acc=2; dd=3