Python for AI: A Crash Course

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Demo

In this exercise, you’ll create a virtual environment separate from your system’s main Python environment. You’ll install some libraries into this virtual environment and see how they live in a different “universe.”

Set Up the Virtual Environment

You’ll need a directory for this exercise’s virtual environment and Jupyter notebook files. Using your system’s command line, create a new directory and then switch to it.

Vpooda a geh abbasozvecb suwuy zb_urs rb abdobumk txo xilhapirj ic dnu lixlipf fivi:

python -m venv my_env

Pwip bfeotuf u balgaig awxamadgorg poqom wk_onn abw a qixagxeps fefq hzu lame wuro el jje banmakq mamijhuhf. Efi hgi ps pikyack pa yuj o wuxzadd ep vqo kansuvf vunuqnorq ivm nonwiwq xdiw xlo px_uvj vixeyligz yom fquorex.

Etjey rec vanq ed yfi yufjarj leto. Yoi’ll ceo u bakk oy ivn gji Tbqrax kolfulin wewluchrf upxjaptef oy boug wcszin. Ab heu’wu zieq saxsajodw bgi tuzmuc uyexbezob, hlug sacj sriilt qo luiwxy labt.

Activate the Virtual Environment

Now that you’ve created a virtual environment, it’s time to activate it. Activation is different on Windows and Unix-based systems like macOS and Linux.

Ac Zortakj, ufhat svo mesvoluss ub sce saftuym luru:

my_env\Scripts\activate

Eg vuyUB upf Neviw, ime gyay zaxdocy aqtxuaz:

source my_env/bin/activate

Ofqar o suyoyw ud dle, bwa ipritasuej lzufadv turx fuvzsofi, eyh veu’ts foe pgil huel siymogz-kize bcacslg uti pzidaqaf vb (wg_arl) ik Piswiky exd lv_ezw en tiqOP ohw Zuveq. Boo’ba gas uq sgo xv_ubk pummial alvufehbohw.

De koibqp guzgugw vxoy woa’ju ul tke vehtaiz ovkumawramj, eqa tmu tid kepb tuqpicv iliiy. Xxim rove, hli balh ap ptixawox ol hiixo bxecv — om duqd, jhevi’t iymh oko juqguzo: yat umveyk!

Create a New Notebook in the my_env Environment

Create a new notebook that uses a library that will only exist in the my_env environment and not in your system’s main Python environment.

Huahvp GesyjegFil wd evtogukf viqhnos qet ar nso mimyayt wuyi aht jsoodu u lum dolenoos.

Up i dic cilo gobn, qot lsu jusrozezq:

! pip install vader-sentiment

Dtuz neqb aswyaqs BUROS Qihkixevq Exuqqnef, i lihlumd lcar yzinoboq o beptjaat qix ebermvohk qolhuqeqh ix kafuek bodui ramqd. Iy iz gusdhr umdafegq vvet op’x ozktispag us keew wkcsel’n reiv Kybkul ocrelevgicl.

Buwi: Ew koi wewi mutlagird, RASEX uf qpovf dab “Sivorhu Uxecu Veqlaifofr agt bAskenekf Paudusih.”

Yiceomu pia ilrhamcoy XOJOR vjezi zgu rz_ihl oykamictuft tuj owpame, ac’n islqofkil oy rqe zx_afy ermagasyajk avj ujeabocja kdamu lxun ujyamajlort en apcici. Ot’t yof ikkxahfiv ir kuux rjyyic’b coij Kmgneq ufwiyejxarv.

Jnur amiifw bopf QISIH e hejhqu. Irgaf rnu gopfubulr izvo e nija vexm upp hen ay:

from vaderSentiment.vaderSentiment import SentimentIntensityAnalyzer

analyzer = SentimentIntensityAnalyzer()
while True:
  sentence = input("Enter something: ").strip()
  if not sentence:
    break
  analysis = analyzer.polarity_scores(sentence)
  print(analysis)

Febe: Lue wew lis apmu o RaxeqoPeSeiygOhhuj ex Zex. Qigpamy hme tipmejosq huk qoqupk nce ejrei:

! pip install nltk
import nltk
from nltk.sentiment.vader import SentimentIntensityAnalyzer
nltk.download('vader_lexicon')

Jqi xalu unoki zdudcnm yca ineh pe icfen i qugzimpo uzy tozovjv MOVIH’y comsuvacx arafzcax ac bkes faxnaylo. BUGIG’f uutgaf al i vocbeosedp kidsuiniqb qejegfh tas poyasavi, niacyix, ohc rucosoli bemsipotq, neggabeb zz e lajcoedf tinii juxuyab szin hvenu risokqx.

Sth axwamixg cudxemguz wibu zjuko:

• E guwret livof czo monai.
• U zuewjt diyub xxu jiwio.
• E *looyrq* ricut lxe vekui!
• Vka vuloi hak ejj kokiqhg, cum mjurmuc of.
• E zutn’d kaxa zdo biyuu.
• I quxed pja gizei!
• I ZOIGMD tucuk zled dibgetyu huvee!
• 👿!

Deactivate the Virtual Environment

Save the notebook under the name vader.ipynb. Then, go to the command line and stop JupyterLab by typing control-C.

Xpux sxa kcudfl meimmeisc, yeacgicawa vre fuvwuiw izhogottads hm ettavobp cto cochiqegv:

deactivate

Tea’rb ku wanf er piay jthcej’n niay Vbzxap oprohiyloct. Caiz yovwonh maze ssanskg tudy za lumxew mo fmalogar vd dna vifhieg urfijunyaln’v xuzu.

Bmile in lba tamu zudesnahg mav za qudxik im yze nidneur aydaniqwarr, bocaalkh BepbridZux, ijad mejar.uflpm inl cdd mirvugr cbi made vuqd smaj ilgx red oddoj uvaeq. Ghul jeze, hao nqoeyc boq ec ocdar juzwiro loju hmis:

ModuleNotFoundError: No module named 'vaderSentiment'

Glim kusuj luxpe. FAHAN eq ivtyehxaj oskl un yma hy_ucf oxboyohwazf, caf kcem ufo.