Python Handwritten notes that will help you learn it in a proper guided way., Study notes of Programming Languages

The developers making the most money in 2026 may not write the best code. They’ll build the best systems. That’s why Python is becoming one of the most powerful skills on the internet. Not because it’s easy. Because it gives people leverage. With Python, one person can: automate repetitive work analyze massive data build AI tools create SaaS products scrape information launch automations save hundreds of hours The game is shifting. Companies don’t just value coders anymore. They value people who can build systems that scale without constant human effort. And Python sits at the center of that shift. The best part? You no longer need a huge team to create something impactful. A laptop, curiosity, and consistency are enough to start. In 2026, coding is valuable. But system thinking + automation = unfair advantage.

Typology: Study notes

2025/2026

Available from 05/16/2026

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‘Page No. ‘Tntroduchion to Pulh ython ‘Mt What is. p cts : ie posing ene 0 Alla ications 0 on 44 thon tar [1:5 an sinh Program Modules, Comment and Pip 21 Modules in python 42 Comments in. ae 18:3 What ie a ppe— } S| Variables Data Tipes keywords 2 0 radars || EB) vale i Ei “ t i | 844 Identifier in an “mi baju in phon (ey vpkihon Ligh, Dictionary. set, Tuple Tipe Conversion jen P , P 4 Dictionary 43 get abate 10-20 2-25 4:4 Tuple Gly 4) [ype conversion Flow Corral 5-1_Tf- statement 52 TR-else ctalement 53 elif _clatment 5-4 Nected if statement Loo 134 4 @:2 For loop c: + ie lop 6:3 For loo ah Need | Y loop Shing i ae on st T4 Deleting — _ Shing_in. python. ae |E5 sig ers ua Sige songel Hinton. — —_ a a 13. om ning “and. ee Li .. . | St No |_ 12. 4. AB: 6 chaptens Advanced data ctucures IR-1 Lists 2 sels 12-3 Dictionaries 8-4 shacks and queues (Using Lists) Functional Progtammin B-l Map, Filler and reduce 18-2 Lambda and Anonymous functions Working with files and directories 4"l File /o Gperahons (Binary Files) 14:2 Divectory Manipulation 43 Working with Os¥ and JSON Files Requlay Expressions N51 Introduction to regular Expression 15-2 Pattern motching with re’ module, 15-3 Gmmon regular Expression Patlerns Web development with python 6-1 Introduction to web development 16-2 Building simple Web Applications with Flask and Django Data Analysis and \isuolizetion 17-1 NumPy and Pandas for Data manipulation 17-2 Mat otlib and seaborn - Page Ne 62- €8 Chey VE) 82-84 85-9 92-lol 2 ) Date ( Eas ‘ 2 elasemate C) osv:No chapter Page. No: | 18: |Machine learning and Al a | \8:1 Itttroduchion” 40. machine learning - _ | 182 Using libraries like gelkit - lean | 102-|to i dnd ~ Tensor Flow ae z=. L Ig3 Simple Machine. learning example. i = are ee — wb classmate es Larae_shandard Library : Stan provides _a_vost_slandiand oy with ready=da-use-modules and funclions for various “tasks ~e) Saving developers time and effort in implementing common functionalities. Object — Oriented Programmin (oop) :- Python ssupparks the abject - Oriented praqramming paradiam aliomine or the creatian dnd manipulakian of objects ~tlassas and inheritance: Cross- Plat Farm Vw— Pulbon ig_available. an multiple Natforms including lindas macs and Linux , making ea | highly portable ana) versatile . Extensive. Third -Parly Libraries ‘- Puthan has _a vast ecasuctem of +hird- party libraries “antl framonvttilee thet Seema capabi lilies iced ferent domains, such as web development data dnalusis , andemachine- demniaes J Cc) Interpreted Nature t= Pythan is_an_ interpreted language meaning it_daes nat require combilitan This rawil/e-imee: fae | clevelopment cycle ds code can he executed direcHy euthate huerencle mes -seprate compilestian step: Thtearatian — ae can easily inteqmle. with other lanquages like C, C++, dnd Tava, alloiing developers is leverage existing Were and _lbrevias: 1.3 A plications OF Python Python is widely used in various domains —_|-and offers numerous applications due to ibs Flexibility eg edse of an Fao mms io — bleh dov - : F in uieb cevelo-_ pment Peet, such_as Django and Flask These framewo-_ ks provides ef Ficient tools ond libtowies to build dynamic webs) tes and web aq prlicalions Data Anal sis and Visualization : Puthon's Lich Scene librayieg including NumPy Sane dnd Mat plat! male it Q-popular chaice far data analucis and visuoliantisn - TL enables professional. to Hones. manipulate and a data effectively. JU Machine learning and ArliPieia Intelligence - Puthon fos: hecn= | me the ao-ta languaqe, for machine leaming and Al Pinjecks. = I:bidties! Nike. Ténsortlow,heras.and scikit -learn provide 'power- : ful tools for implementing complex algorithm. and lining. madels - Automation and Scripting: Puthan's easy= to - read _guntax and rapid ee He leraiedte ik ap bided|-chatce: for aT pilamalicn ani! scripting tasks + It is commonly used for tasks such as file manipulation data patsing aod system admi Al tation: Ly Pathon Insta lation ‘| +5 download and install Puthan Fallow these steps classmute Date Page —— | f Printing Hello World uising pudhan Print ("Hello World |") = let's break down the cade: * The piint() function is used to display tbe. specified message or_value on the cansale- ~ | * Th this case we pass the ching. "Hello, World |" as_an argument do ihe print Funchian- The sting is enclosed in daithle au ote : - The 4 | cumbol indicates a comment in Puthan - Comments are _iqnored by the inleroreler and are ttsed ty provide explainations or notes ta the mde. ! ST —— classmate Dste (ee — ae Podeles. =a —— E124 Modules in puthon : u —— e} of having all uout cade _in_a_sinale Ble, you con _gplit it inks muttiple~modules based _on air puniose.- uihereuen wank 46 use the Functionality ftoth_b module un can import i+ into you current program ac_anather Module. This allows an to access and use funclions classes and variables defined bithin shat module you fined wariting Sho came. mde repeatedly and inshad’ reuse the. code — debinedd in the edule. | “Tiree _main types of modules : Madules = —— = a {_[ puilb-in maddles] | Fofeznal Modules | Eon to DA Built -in modules : These are modules +hat come. pre - installed ae Tn fy hon, comments followed by the smal erin He lst ne rpreler encounters a comment, it ignores ik abd maves ah_to the next lin at the end of line or_an_a mm by themselves: Ths important ty that comments are meant tor human readers Vand are nok executed bu the. Puthon inkrpreten: Therefore. they bave. no jimpacE an the program's Punclional ity ~ ar perfanmante Tres oF Comments ! =] any SS [pes of Commenrs i 1 — Single=line Comment Mull -line Comment _ 1: Single -line comments Gingle-line. comments are used tn add 3 explainatary notss or comments on a single. line of colle: They “lat with a hash symbol (4) and continue untill the end of the line: Anything. written afler the hash ssyenbel is considered a comment and 1s ignored by the Python interpreter « Hore’ an okanbphe ! # This is a _single~line. comment ix =5 Ht Assigning a value to the yariahb ; Q- Multi-line. Comments : ia Mulli-line comments alsa known as black cam- J ments. allan tau to add comments that sarm multiple lines - Python aes pot have a built-in syntax speci'— | tically ~far_multi- line comments, but “ypu can_atheive. ~ This by usin triple quotes (either single of double) +o create a “hind thall- is not assianed to any variable - Since if ts nok used elsethere._in the? cade it_acls as a_comment - | Here's an example: " 7Brs iso mult—line commen Tt cay span acrnss_multinle (nen and _is enclosed within triple uates - Wwe | | x=5 7 Assigning a value to the variable x - sel 2.8 What is o pip 2 | Th simple terms pip is a package, managet for_puthon- Tt Shands for Pip Inctalls Packages" or "pip incall Puthon” : e S When workina sith python ,jou_may need to use extern |_ libraries at matluled Shae provide additional functionalities | betiand what the slandar libyaxy abkers . Jbese_ libraries I are_atlen developed by the puthan Eomnaunity and_ate | qvaillble for dnuone to use. I | Pip makes “it easy to instal) a package, Manage —foakd_tnita thes. oxternal_libraties- pes you Fr classmate av area Datel 3:1 Variables in Pulhon Ta Puthon variables are. used to ilove values Wels: Ket eer leler tnsae Brogtam You can 4hink of variables as_cantainers that! bald data: hat makes puthon unique ie +that uow don't need to explicitly declay } ; : type of a_yariable: You simply assign_a value to a variable using the "=" operctar - ] : for_example you mn create a variable. called "name." and assign it a value like his: name =" Yadnyesh" Here, "name" ie the variable. name, and "Yadnyesh” is |the value. assigned to th Puthon will oudamalteally Im- ipe the tupe a> variable Based on the value “designed 2 ee = | Variables in Python can hale) diferent types ob data stich She as numbers ,ehinas, lists of een marc. You_can change he wile a ar yernble. ed! any ime. “hy 4 classmate. Date Page _. assigning _a new) value to i. for instance : qqe=25 age=26 FH Updating the value. of age variable: Python also_allawe vou to eHform aperations an variable: “for example, you an add, subst -noultiply ar_divide dogies Landa ihitenmanaens %u_can even cambine yaviqhies A> OMiMGine dopesuiising oneradors . For inshanee. T wW =I seal ot x= 5 Y= 3 xa axty # The value of 'X' will be 8. greeting ="Hello” SJ i name = "John" message = greeting + ""+name # The value. of message! will be “Helly Jahn” Variables provide. a_way to store and manipulate dala in sython', makingutk easier to warkwuithloinhare | mation Hhiauahput yo program - By giving meaningtul if [names +o Variobles you can_maké patie cade more _isadable and ‘understandable’ classmate Date Page e Here dre some_examplas of valid_idenlifiers_in python — * ty variable. * count * total sum =P * Muclass J And here are. some examples ot _invalid identifiers : i93abe (starts with o digit) way variable( contains a bupen) (a_reseived word) : ay var ( conlaing a space) Understanding and following these ctulas for identifiers in -Pytnon is importa proper Gindinvling of our code- a =)