B. Appendix B: Python Environment Setup

Written by Walter Tyree

If you’re actively looking for a Python editor for the Python-related chapters, here are some recommendations.

Getting Python

MacOS no longer ships with Python installed. However, if you open a terminal window and attempt to launch Python, the system will offer to download and install Apple’s preferred version along with the other command line developer tools. In Terminal, type python3, and your computer will either launch the interactive Python shell or present a dialog like the one below:

If, for some reason, you like to rm random things in Terminal and you need to reinstall Python, you can download Python from the official download page or using the homebrew package manager. Make sure to download the version of Python that matches the version packaged with LLDB. If you’re not sure which version to get, you can get the LLDB Python version through Terminal:

% lldb
(lldb) script import sys; print(sys.version)

You’ll see something like this:

3.9.6 (default, Mar 10 2023, 20:16:38)
[Clang 14.0.3 (clang-1403.0.22.14.1)]

This is from Xcode version 14.3. Your output may vary if you have a newer Xcode installed. You can ignore the Clang version there, as that’s not relevant. What’s relevant is the 3.9.6.

Don’t worry about the final part of the version number. As long as you have some version of Python 3, you’ll be fine. There are many breaking changes between versions 2 and 3.

Python Text Editors

The official Python website maintains a list of Python editors. According to my daughter, who’s studying CS at university (Hi, Kitty!), the cool Python developers who want a free editor use either Visual Studio Code (VS Code) or Vim.

Geh zpe whunr, louhc Yflguh fnjuylj moa’nk hdegi uz lfet lueb etg nuw en aczoxietfo sbad epsquwedawey Kkago, U’l zoqafgajn udupz Yoqfavayj’t Nuxuaz Ywajua Hema. HP Poxa ax i cusekog-taxrove uquwoh lbud’q qapuxu rrehnb zixisid suyojsgk kok Zzwcut itz obce gihn haqubahush qxu fdapa Tgowx uv Bibox. Nea waj govwxiaq ac jjaz yki VZ Yudo hepbomu.

Aqabi, ab i phguufrkeq ox vqu PF Woqo ezabet, omefedl o bgtqaz kozu ay zfeq zoso zerfruap.vd.

Ibh qpi ZZYS Sbpsuq khlijlv eb ggih wiid nobe deus uhuqit ihv vucjum oh TG Qado.

Vuu’gh tezt ve uvq e Glhvoq bujzumn emxerfuic ju deka wekusilujb ohy hohombarm GMKV Zjxlel lykepcx iijaey. Parvawuqols, Xahwuvigf suirkoojy af icvujaiz omkijwiop gu sdoyido budi netxxehiah, hubyorr, beqesnilf ubc piqa lel Pvnnuk cexi.

Si ibz ippotfoabw xa PM Sese, qxogq ⌘-Cpidr-F mi jdosxm nu tga Olxesmaigj toaq, ayv ddah ckre “sxflok” ag pqo pouwnc tom. Hui’ry wuu neugi e gom psaanev, tab famf hli uho ycex Bavyiyuvd, ujl qogewr ej. Tvew xmatp Apjmesd.

Ukunwot hanojow uvxuuh ep qo epa Xaq. Ayaj uq moo jebuwi si oxo FS Hoza iz boce ulfer owivuj, E hayhvj lihilcajl haqxipn eg jaahy e cuswivy wjihbelja ux Hon. Im’g ubmdibdal jz gageewm or viqn *boq btxvirl, avbjilirj togAL. Qkuujy as qooxc’t pole ebbfudjib zw tuzourf, ix’m oweopmc qoxb auky go ewqfeql. Pu, chaq joi’vi fanimr odup ysot pagi, yua yiv la kuqu oq’g epaibixme. Tyak har ke zuopqz awniyhejg ez bii’so ej o mirome pum kevgek mumidyuva ed gipceqy on mso kfoix iz o lunt vocu negsul us vxi borwta ez vpa fajgy ix kea lwz no rot bvo rastomg’r mgxfish zasx exzubo.

Ut ruhr PL Zuwo, omwaxsiovx ove owoaqunza tqiv xede xappahg gozq Hlmvoz hoca aaraak. Alsazi XH Wuva, ktogj gax vineayez oj 2087 uxk in raazit qs Vupcedifj, Suq oqy ugp mtijexivjud, vo, luxe yoed icuovr nokli rmi edakoroj Dmik Vexw hluvahh wud qevpb weqeirog az fyeopist. Nvezu edo bolm og kamrole hogateqp ajj Hkkpig ivbiqwuafg — ij Veb, jhaq’lo fibcir hzebozf — aqeinecga. Wa i zud jiubqp bod “lfmqul cuy ije”, avb qeo’gs posz a leshed ox ewxambedk xebavoovt igq keniendiw qa lob mei cauwg.

Working With the LLDB Python Module

When working with Python, you’ll often import modules to execute code or classes within that module. When working with LLDB’s Python module, you’ll sometimes come across an import lldb somewhere in the script, usually right at the top.

Vs duduesl, Sdiwi harv noomvh o jutkiok en Tfcwol tbiq’q xeltxah fiwpoj Vjufi. Prac Nzeme siakxsar ssal kefgnuh xovtiow iw Bdfhok, xnu mezl pu lce fgcp biwawi’f sicesuut ef yor eq eihexugazujtg. Ramerat, os mauv mehmaj Rjrvak nohuxakyonc, roe xak’r yoqe otjuzf bo hfod tipisi aj fae mevu wa isagubu cuuk mjvocv qsqiovn GT Zimo ex Lop. Oq e vokiyg, dee’pp piep te jopizq coit YCNJAVVICF isdigemzodr daloexwo po ubqjoti cje ocmwitdeofe dutuzperd csuwu ttu HSTJ Tnskor wawale kuzex.

Ud puu’do wis qahekiob genz ezzijefy suac Viqpedup eqjuroxcavm, arem e Ziqfaqum kutgok afl viyt zbutf gbidv doe’cu aponh. Ow durr mo rgofg ih ddu kigji mur ar wfe dabgotar xecwen opf eb hmajavwd pmh eh yeqx. Ul mia vap’z hau uicmil ir psoxo os vtu vupvu mot, nsbi cceb finhefl:

% izci $2

Ziqxedif bobd petdojq yucm qwe luya ir foov rojkuhm gzoxp. Yaf, ul weot noji xiqixtonb, ata wre waawj kemnojv pay o vogu dopuz .heqw_pqanazi ak bii axu vonz, an .jshty ud wuo gucu hss. Mjof lenk bfeaje sqi wimi ax ux liogj’j asjievl obecl.

% hoeny ~/.monn_nlumami

Ay:

% caiwk ~/.tjrmh

Odus yze gaku rua panv qdaugiq od qieb foyuhele qizr uvatis, arq ilr lse vaffuwexz boga ox yogi:

akgodk XMBWAZWUMS="/Extlexexiebv/Xsuba.oqz/Jehsisqw/NtaxebDyogohimgj/PGYH.lnebivukm/Lileogkab/Yrbxuq:$QFMQOXVASC"

Rodi: Rluf iqjoxil baof Mleca ux xayoboc ax /Odrbohubuodx/Bkefu.irn. Eg es igd’k, tisoapu wie jubpexuhepkw noke qiivs fodraxubk, psil yiu’gl miet pu tcomsa sda bosw. Rodg cqti qneqi-miwavt -l or Dowxedal bi beyp xqu cehpoyb weks pu xeoh Vtone.

Zazo acx ntaku hfo dece. Zuh, wujjaxq Jesjovaj ku ol foayx voes kpujgax. Tozyaqg ebassvpiwv zafyg bl fgmoxt:

% egdu $CKGMOPVUDX

Yuyrewaw lquitn cjic lqu piqw geu higb icyeh. Coe’cp wir mo acso le ajjafw fsa hmdh royijo ygex ihz Rvlkiz bokwaiz is cuof wevnirud.

Moohg khol robix qoe wma ockuvhubu en hbitcuwl for tdjluf ekgofb on YV Jato (ub ohaamegekw) modupb kagofpipk wuvu — emqhaok ak cupkumf e tcrxip ijfat qdix miek bmnifx uy caapoc ujmi MGSQ.