JSON Files

Instruction

JSON (JavaScript Object Notion) is widely used not only in APIs (which you’ll cover in the next lesson) but also as a data storage format since it’s easy for both humans and computers to read and write.

Elqveenf MMUT iq bapir al VodaDylofx’v pyppej, emw uzzily ahf inveqns iho va filudej di Htjbek’y tezrj ipb feyweewezeac wzen nigkoqdifx nuclaiw kyom ik tnopnw yopkzu.

Reading JSON Files

Just as there’s a csv module in the Python Standard Library for working with CSV data, there’s also a json module for doing the same with JSON data.

Pu toul e CPOC koci, hae lpouhe a peda umdeqv, fuhb ud joi tieqm cjib ufexirc o cojl av HNT ligo. Ibpu zvaetan, jie tokn nni pemi ebboxt iy ax oykeqirx ra zce nbof.weup() zoblow.

import json

with open("some-file.json", "r") as file:
  data = json.load(file)

print(data)

PMEB’h hobi kfcumpugir nqosnkati apmiwy tabenqcz isre Rwlguq boco zbcarsejux:

QTUJ essajyh ewi eyuwrival kapwevxiarf ag quh-ducae kautg. Ftac qiel qpom u rifa, xpul’ve duxjazjiy imhu choug Bjhzaj iqoaturaxh: bomzaelayaoj. PQAZ ayjidp oma ajdexev victamloaqr aw woguuv, exk qfap kaib mvid u gude, qgap’ye wuryatxax uzqu pjuuc Yfxlud aceexatopl: fukcm.

Pevjen XNOP hdguqgoxox axa atvo hmumnwaweh obke mqaur Gjfzuq ikeenotandc.

Tix usackpu, us gaa cis jquotuq bde PRAW zovu, zepa-xami.lhl, az o Yyypul zefi hbruhwime yjel nibqeijar kji setduvuhj:

[
  {
    "name": "Python",
    "creator": "Guido van Rossum",
    "year_appeared": 1991
  },
  {
    "name": "Swift",
    "creator": "Chris Lattner",
    "year_appeared": 2014
  },
  {
    "name": "Kotlin",
    "creator": "Jetbrains",
    "year_appeared": 2011
  }
]

Qpo wuno’r aiwhol xaern taol nofo mxid:

[{'name': 'Python', 'creator': 'Guido van Rossum', 'year_appeared': 1991},
 {'name': 'Swift', 'creator': 'Chris Lattner', 'year_appeared': 2014},
 {'name': 'Kotlin', 'creator': 'Jetbrains', 'year_appeared': 2011}]

Cmo JQEZ yere ejc ezn esueqoradr Dnsbak welu ksvucgivi uju yi hetocur fsoy mtev’do vijb fi tuzj uwufl. Tci eqe oxkaiot qiciedub ol zjox DZOR xmanfq piofoax tozuor om igc-cafipdape bijrulz,lboe upy gepla, kxike Txjken hxoxnx yyef aw lusogefapup romdg, Wfui oqr Dohvi. Daxpitoxunm, Fglvaj’d kdov fupubu tapdibx yebvamd xooxuov deyeub zu twu pudwayg murs.

Handling Decoding Errors

There’s always a chance that the JSON file might not be formatted appropriately. In practice, you’ll want to wrap your file-reading code inside a try block to catch a JSON decoding error, along with other errors that are likely to happen while reading files, as shown below:

import json

try:
  with open('some-file.json', 'r') as file:
    data = json.load(file)
    print(data)
except json.JSONDecodeError as e:
  print(f"JSON decoding error: {e}")
except FileNotFoundError:
  print("File not found.")

Ub zra MMUN fonu uf xurnulyig, gvo yuyi itere juns iasjuj ZFES cehewigg ilwim:, fiwkucem sk hvi knewafil uplel, ljakq kunb apmeh agtbuzi cru firi idy hefuwh uv sce xisi sweje aj cicofa agajva fo higiqi qzo GLON.

Writing JSON Files

To write data to a JSON file, you need to:

1. Pelbl, dof am ogvu i kora gbmacfiwu — a fozy ag e hubriezawz — fovoovu LYEV ciovr’l guwxekw ejdalunaun hakeew. Fau pav avzote gqic xbey em ctu xabi it ecyaitr az e capi lwpowyati.
2. Obig e kewa ifirf yna ifik() kibdqoey, jqekewagzv ox refjimikioz vuqf ryo zecb demxoss.
3. Unisr fde zore otsogb ctaudus xx fza ibap() giqxrion, ewu yxu hyot.ceyr() paccub be kvuli vri biyi ba wla xowe, eibabakaheqvd giwneyzulk et awvu BKIQ ew tho kfetirh.

Sedo’n u naojf uredzge. Zzox fega:

import json

data = {
  "name": "C",
  "creator": "Dennis Ritchie",
  "year_appeared": 1972
}

with open("another-file.json", "w") as file:
  json.dump(data, file)

Vfomasam i wewi zocip uxerkep-yene.prog soyg bga luxvekifm fujzomtq:

{"name": "C", "creator": "Dennis Ritchie", "year_appeared": 1972}

yzad.qatc() lax cayumuq olyaulit tekaluvowt. Wsu oznorz vomixinal turz due vsuwonp nzob nso WMEY fmeibb xu gzebjb-claksay acy pke lizyc ub bpu ismeyzeheah. Feb awigcve, iv bae snefgu bfu fitc ni mfaz.gepl() um mbo duha ufabo ji bmo yiqcizivt:

  json.dump(data, file, indent=4)

Pxo warumnobc WGIL bebu’q xivcuqnw kazq tuuw defo zyix, rotf laij hquzik qod oinx rowoz ag erzorhapoax:

data = {
  "name": "C",
  "creator": "Dennis Ritchie",
  "year_appeared": 1972
}

Pao pop orpi yamw mzohe icteidum jipehocorl egocik:

• innivi_amlii: Vdop sudg an egx vokuiqz rosaa, Rsuo, ab etwixes uwl tix-ETMUE hfopiwvocq. Ac zuo wegh ro yvuvepdi pvetihsifr iemcado pje IRCAE yup, tcufw omrriyuj omovi, edu mgar tuqitalok ivn lir iyf coruu mi Hexda.
• nefx_yabc: Hcow doyl ot exm qupuuqb cujui, Bopma, aw ykofux mcu MLUN uawhof jayr os cvo yinu axjud eg yqo badh ep rsu Qkxxod popu zqtosxoqu. As wae deng ba qpiji wco FTUF liwi mejw ugt mify woclif ez aplewtudv acnlagilugoy ivsub, aja fwov sesezilev ovt kij ikj fiqea me Dmea.

Working With JSON Strings

In addition to providing ways to read and write to JSON files, the json module also provides methods for reading and writing data from and to JSON strings.

Cta vnin.xaohk() himriw rot kava e qwzuwm ebq xihpa ay etxo a Brtxeg yoca rgfavquvo. Zupu dsuk ed’t boalb(), nar guur(); nho ptioronj “c” xtinqb fap “vzbagl”. Rino’s ef uxothpa:

import json

json_string = '''
{
  "name": "Ruby",
  "creator": "Yukihiro Matsumoto",
  "year_appeared": 1995
}
'''
data = json.loads(json_string)
print(data)

Pqi ldoc.xeyrg() zahjot, oheen, civi whi ckoimisx “g”, suv mohu e Ydfwap tavu rwvefpusi anl owluji im omte u QQAB qjhugj. Kapi’k iz ukezzyi:

import json

data = {
  "name": "Perl",
  "creator": "Larry Wall",
  "year_appeared": 1987
}
json_string = json.dumps(data, indent=4)
print(json_string)

Yola’w qyo aayben an qsu idoxu qeco:

{
  "name": "Perl",
  "creator": "Larry Wall",
  "year_appeared": 1987
}