Video: Lub thawv hauv Python yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Ntim yog tej yam khoom uas tuav ib tug arbitrary naj npawb ntawm lwm yam khoom. Feem ntau, ntim muab ib txoj hauv kev nkag mus rau cov khoom uas muaj thiab rov hais dua lawv. Piv txwv ntawm ntim suav nrog tuple, list, set, dict; cov no yog cov built-in ntim . Thawv abstract base class (cov.
Tsis tas li ntawd, Namedtuples hauv Python yog dab tsi?
Sau npe hauv Python . Python txhawb nqa hom ntim xws li phau ntawv txhais lus hu ua " cov npe ()" tam sim no nyob rau hauv module, "sau". Zoo li phau ntawv txhais lus lawv muaj cov yuam sij uas hashed rau tus nqi tshwj xeeb. Tab sis ntawm qhov tsis sib xws, nws txhawb nqa ob qho tib si nkag los ntawm tus nqi tseem ceeb thiab iteration, lub functionality uas phau ntawv txhais lus tsis muaj.
Kuj Paub, hom ntaub ntawv dab tsi hauv Python? Basic Data Types hauv Python
- Cov lej.
- Floating-Point Numbers.
- Cov zauv.
- Cov hlua. Escape Sequences nyob rau hauv Strings. Raw Strings. Triple-quoted Strings.
- Hom Boolean, Boolean Ntsiab Lus, thiab "Qhov tseeb"
- Built-In muaj nuj nqi. lej. Hom Hloov. Iterables thiab Iterators. Cov ntaub ntawv sib xyaw. Chav Kawm, Tus Cwj Pwm, thiab Keeb Kwm. Input/Output.
- Xaus.
Tom qab ntawd, dab tsi yog python sau?
Kev sau hauv Python yog cov thawv uas siv los khaws cia kev sau ntawm cov ntaub ntawv, piv txwv li, npe, dict, teeb, tuple thiab lwm yam. Cov no yog built-in kev sau . Python collections module tau qhia los txhim kho cov haujlwm ntawm lub built-in sau thawv.
Kev siv Defaultdict hauv Python yog dab tsi?
A defaultdict ua hauj lwm raws nraim li ib txwm dict, tab sis nws yog pib nrog ib tug muaj nuj nqi ("default factory") uas yuav siv sij hawm tsis muaj kev sib cav thiab muab lub neej ntawd tus nqi rau ib tug tsis muaj tseem ceeb. A defaultdict yuav tsis tsa ib tug KeyError. Txhua tus yuam sij uas tsis muaj nyob tau txais tus nqi xa rov qab los ntawm lub Hoobkas pib.
Pom zoo:
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