eval yuav kho txhua tus ntawm lawv raws li qhov hloov pauv hauv zos. Yog tias koj sim siv lo lus tseem ceeb sib cav thaum hu eval, ces koj yuav tau txais TypeError piav qhia tias eval yuav siv sij hawm tsis muaj lo lus tseem ceeb sib cav. Yog li, koj yuav tsum muab phau ntawv txhais lus thoob ntiaj teb ua ntej koj tuaj yeem muab phau ntawv txhais lus hauv zos.
Qhov twg tsis yog lo lus tseem ceeb hauv python?
Python tsis lo lus tseem ceeb returns True yog tias tus nqi sib npaug rau False thiab vice versa. Lo lus tseem ceeb no inverts tus nqi ntawm Boolean. Cov lus tseem ceeb tsis tuaj yeem siv nrog cov lus hais los xyuas seb tus nqi tsis nyob hauv daim ntawv teev npe. … Booleans yog hom ntaub ntawv uas tuaj yeem yog ib qho ntawm ob qhov txiaj ntsig: Tseeb lossis False.
Puas yog lo lus tseem ceeb hauv python?
Kuv xav paub vim li cas cov ntaub ntawv tsim tawm xws li int, dict, thiab str tsis yog lo lus tseem ceeb. Piv txwv li, kuv tuaj yeem siv int ua qhov sib txawv thiab muab nws rau str. Thiab tom qab ntawd thaum cov khoom int raug ntsuas, nws ua zoo li str. Tsuas yog hauv Python 3 muaj Booleans tam sim no dhau los ua cov ntsiab lus.
Kev ntsuas dab tsi hauv python w3schools?
Definition and Usage
The eval function ntsuas cov lus qhia, yog hais tias qhov kev qhia yog lus Python raug cai, nws yuav raug tua.
Puas muaj pes tsawg lo lus tseem ceeb hauv python?
Cov lus tseem ceeb yog siv los txhais cov syntax ntawm coding. Lo lus tseem ceeb tsis tuaj yeem siv los ua tus cim, ua haujlwm, thiab lub npe sib txawv. Tag nrho cov lo lus tseem ceeb hauv python yog sau rau hauv cov ntawv qis tshwj tsis yog Tseeb thiab False. Muaj 33 lo lus tseem ceeb hauv Python 3.7 cia peb mus dhau tag nrholawv ib leeg.
