Pie Meets Py / PyCon JP 2019

by 7pairs

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Pie Meets Py - PythonͰAndroidΞϓϦΛͭ͘Ζ͏ 2019-09-16 (PyCon JP 2019) ௕୩৔ ५໵

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ࣗݾ঺հ • ௕୩৔ ५໵ (͸ͤ͹ ͡ΎΜ΍) • ֤छSNSͰ͸ 7pairs Ͱ׆ಈத • ޷͖ͳେࡕۅӂ͸தଜ߶໵ " / ޷͖ͳ෋࢜େֶ͸֎࡚मଡ # • ͓࢓ࣄͰ͸Android (Java / Kotlin) / iOS (Objective-C / Swift) ͕த৺ • ͋·ΓҰൠతͱ͸ݴ͑ͳ͍Pythonͷ࢖͍ํΛ໛ࡧ͢Δͷ͕େ޷͖ • PyCon JP 2018Ͱ͸Transcryptʹ͍ͭͯൃද • https://speakerdeck.com/7pairs

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ஶॻ Chalice, Transcrypt, pytest, SeleneΛར༻ͯ͠  αʔόʔϨεΞϓϦΛ࣮૷ɾςετ͢ΔຊͰ͢ AmazonଞͰઈࢍൢചதʂ

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͜ͷηογϣϯͰ࿩͢͜ͱ • PythonʹΑΔAndroidΞϓϦͷ։ൃ؀ڥ • ֤։ൃ؀ڥͷ௕ॴɾ୹ॴ • ։ൃ؀ڥͷબͼํ

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͜ͷηογϣϯͰ࿩͞ͳ͍͜ͱ • ֤։ൃ؀ڥͰͷৄࡉͳ࣮૷ํ๏ • ֤։ൃ؀ڥͰͷςετํ๏

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͜ͷηογϣϯͷΰʔϧ • AndroidΞϓϦ։ൃʹڵຯΛ͍࣋ͬͯͨͩ͘ • Pythonͷଟ༷ͳՄೳੑΛ஌͍ͬͯͨͩ͘ • ύʔςΟͰࢲ͕΅ͬͪʹͳΒͳ͍

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ͳͥ “Pie Meets Py” ʁ

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PieͱPyͷൃԻ (ถࠃӳޠ) • Pieʲpάɪʳ • Pythonʲpάɪθɑnʳ

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Pieͱ͸ʁ • Android 9.0ͷίʔυωʔϜ • Android 1.5 (3൪໨ͷόʔδϣϯ) Ҏ߱   ֤όʔδϣϯʹ͸ΞϧϑΝϕοτॱʹ   ͓՛ࢠͷίʔυωʔϜ͕͚ͭΒΕ͍ͯΔ

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Android 1.5 Cupcake

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Android 1.6 Donut

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Android 2.0 Eclair

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Android 2.2 Froyo

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Android 2.3 Gingerbread

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Android 3.0 - 3.2 Honeycomb

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Android 4.0 Ice Cream Sandwich

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Android 4.1 - 4.3 Jelly Bean

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Android 4.4 Kitkat

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Android 5.0 - 5.1 Lollipop

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Android 6.0 Marshmallow

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Android 7.0 - 7.1 Nougat

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Android 8.0 - 8.1 Oreo

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Android 9.0 Pie

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Android 10 • 2019೥9݄3೔ϦϦʔε • PixelγϦʔζ͔Βॱ࣍഑৴ • ͓՛ࢠͷίʔυωʔϜ͕ഇࢭ $ • ੈքதͷ͢΂ͯͷϢʔβʔ͕   ಉ͡Α͏ʹೝࣝͰ͖Δ໊લͰ͸ͳ͍ͨΊ

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ͳͥPythonͰAndroid։ൃʁ

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2018೥य़ͷϫΠক

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ڝ߹ͦ͠͏ͳྖҬ • WebΞϓϦͷόοΫΤϯυ • ΫϩʔϦϯάʗεΫϨΠϐϯά • σʔλ෼ੳɾՄࢹԽ • ࣗવݴޠॲཧ

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ͤ΍ʂAltJSͰCfPग़ͨ͠Ζʂ

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PyCon JPʹAltJSͷηογϣϯ͕ര஀

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2019೥य़ͷϫΠক

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ڝ߹ͦ͠͏ͳྖҬ • WebΞϓϦͷόοΫΤϯυ • (ࣗಈ) ςετ • σʔλ෼ੳɾՄࢹԽ • ࣗવݴޠॲཧ

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ͤ΍ʂAndroidͰCfPग़ͨ͠Ζʂ

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PyCon JPʹAndroidͷηογϣϯ͕ര஀

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PyCon mini HiroshimaͰ΋ൃද͠·͢

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Why did you want to develop  Android apps in Python ?

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Because it's there.

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։ൃ؀ڥ

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બఆͷ৚݅ • ࣮૷ݴޠ͕PythonͰ͋Δ • ࣮༻ʹ଱͑Δ଎౓Ͱಈ࡞͢Δ • Google Play StoreʹϦϦʔεͰ͖Δ

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͝঺հ͢Δ։ൃ؀ڥ • React Native + Transcrypt • Kivy • Chaquopy

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React Native + Transcrypt

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React Native • Facebook͕։ൃ͍ͯ͠ΔΦʔϓϯιʔεͷ   ϞόΠϧΞϓϦέʔγϣϯϑϨʔϜϫʔΫ • جຊతʹReactͱಉ༷ͷݪཧͰಈ࡞͢Δ͕   ඳը͸֤OSͷωΠςΟϒAPIΛར༻͢Δ • ࣮૷ʹ͸JavaScriptΛར༻͢Δ • Android / iOS / UWPʹରԠ

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Transcrypt • PythonΛJavaScriptʹม׵͢ΔAltJS • ެࣜαΠτᐌ͘ “subset of Python” Ͱ͋Γ   ͢΂ͯͷػೳΛαϙʔτ͍ͯ͠ΔΘ͚Ͱ͸ͳ͍ • Ұ෦ͷඪ४ϥΠϒϥϦ͕ར༻Ͱ͖ͳ͍ͳͲ • JavaScriptͷॲཧΛγʔϜϨεʹݺͼग़ͤΔ • JavaScriptͷ֎෦ύοέʔδ΋ར༻Մೳ

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AltJSͱͯ͠ͷPython • PyCon JP 2018ʹͯ   Transcryptʹ͍ͭͯൃද͠·ͨ͠ • https://www.youtube.com/watch?v=zGqUysiC1xA&t • https://speakerdeck.com/7pairs/pycon-jp-2018

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React Native + Transcrypt • React Native͸ϓϩάϥϜΛ   JavaScriptͰ࣮૷͢Δ • Transcrypt͸PythonΛJavaScriptʹม׵͢Δ • ૊Έ߹ΘͤΕ͹PythonͰReact Nativeͷ   ϓϩάϥϜ͕ॻ͚ΔͷͰ͸ʁ

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ݕূ݁Ռ • ΤϯτϦϙΠϯτ (App.js) Λআ͍ͯ   ͢΂ͯPythonͰ࣮૷͕Ͱ͖·ͨ͠ʂ %

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Positive ! • ιʔεͷߋ৽Λ؂ࢹͯ͠τϥϯεύΠϧ͢Ε͹   Fast RefreshͷԸܙʹ͔͋ͣΕΔ • ܕώϯτΛ͚ͭΔ͜ͱͰ  τϥϯεύΠϧ࣌ʹܕνΣοΫ͕Մೳ

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TypeScriptͰे෼ͳͷͰ͸ &

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TranscryptͷܕνΣοΫ def concat(a: str, b: str) -> str: return f"{a}-{b}" # 33-4 concat("33", "4") # error: Argument 2 to "concat" has # incompatible type "int"; expected "str" concat("33", 4)

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Negative $ • Pythonͷlambdaࣜͷ੍ݶʹਏΈ͕͋Δ • ͋Δఔ౓ͷن໛ͷॲཧΛॻ͖͍ͨέʔε͕ଟ͍ • JSXͷѻ͍ʹਏΈ͕͋Δ • ֎෦ͷJSXίϯύΠϥΛݺͼग़ͯ͠   ͦͷ݁ՌΛຒΊࠐΉͳͲͷখࡉ޻͕ඞཁ

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Kivy

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Kivy • Φʔϓϯιʔεͷ   ϚϧνλονΞϓϦέʔγϣϯϑϨʔϜϫʔΫ • OpenGL ES 2.0ͱޓ׵ੑͷ͋Δ   άϥϑΟοΫඳըϥΠϒϥϦ • தؒݴޠKVͰͷը໘ɾ΢ΟδΣοτͷఆٛ • Android / iOS / Linux / Mac / WindowsʹରԠ

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KivyʹΑΔΞϓϦέʔγϣϯ։ൃͷ͢͢Ί • PyCon JP 2017ͰͷJun Okazaki͞Μͷൃද • https://www.youtube.com/watch?v=iVOVpIXzbYY • https://www.slideshare.net/JunOkazaki1/pyconjp2017-kivy

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KivyʹΑΔHello world from kivy.app import App from kivy.uix.button import Button class TestApp(App): def build(self): return Button(text='Hello World') TestApp().run()

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Buildozer • KivyΞϓϦͷAndroid / iOS޲͚ͷύοέʔδϟʔ • Android޲͚ͷύοέʔδϯάͷࡍʹ͸   Buildozer಺෦Ͱpython-for-androidΛར༻ • Ұ෦ͷPythonύοέʔδͷΠϯετʔϧʹ΋ରԠ • ඇରԠͷύοέʔδΛΠϯετʔϧ͢Δʹ͸   recipeΛࣗྗͰ࡞੒͢Δඞཁ͕͋Δ

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Plyer • OS΍୺຤ݻ༗ͷػೳΛ   Python͔Βར༻͢ΔͨΊͷAPI܈ • ৼಈ / Χϝϥ / GPS ... • ରԠ͍ͯ͠ͳ͍ϓϥοτϑΥʔϜͰ͸   NotImplementedErrorΛraise͢Δ

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Plyerͷαϯϓϧ from plyer import vibrator vibrator.vibrate(10)

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Pyjnius • Python͔ΒJavaͷΫϥεʹ   ΞΫηε͢ΔͨΊͷϞδϡʔϧ • Plyer΋಺෦ͰPyjniusΛར༻͍ͯ͠Δ

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Pyjniusͷαϯϓϧ from jnius import autoclass Context = autoclass('android.content.Context') PythonActivity = autoclass('org.kivy.android.PythonActivity') activity = PythonActivity.mActivity vibrator = activity.getSystemService(Context.VIBRATOR_SERVICE) vibrator.vibrate(10000)

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Positive ! • ϑϨʔϜϫʔΫͷઃܭࢥ૝ͱͯ͠   Ϛϧνλον͕ߟྀ͞Ε͍ͯΔ • OS͝ͱͷ෼ذ͕සग़͢Δ   ͳΜͪΌͬͯϚϧνϓϥοτϑΥʔϜͰ͸ͳ͍   • ։ൃ͕׆ൃʹߦΘΕ͍ͯͯ҆৺ײ͕͋Δ

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Negative $ • Flutter΍Jetpack Compose͕ଘࡏ͢Δ   ྩ࿨ͷ࣌୅ʹ͓͍ͯ͸   UIͷͨΊʹผͷݴޠ͕ඞཁʹͳΔͷ͸ඍົ • ଞϑϨʔϜϫʔΫͱൺ΂Δͱ   ͢΂ͯʹ͓͍ͯϫϯςϯϙಈ࡞͕஗͍

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Chaquopy

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Chaquopy • ެࣜαΠτᐌ͘ “Python SDK for Android” • build.gradleʹهड़Λ௥Ճͯ͠ಋೖ • Java / Kotlinͷ୅ΘΓʹ   PythonͰ࣮૷͢ΔΠϝʔδ (ࠞࡏ΋Մೳ)

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ChaquopyͰͷHello world from android.os import Bundle from android.support.v7.app import AppCompatActivity from java import jvoid, Override, static_proxy class MainActivity(static_proxy(AppCompatActivity)): @Override(jvoid, [Bundle]) def onCreate(self, state): AppCompatActivity.onCreate(self, state) self.setContentView(R.layout.activity_main)

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ࠓԶ͕ॻ͍͍ͯΔͷ͸Java͚ͩͬʁ &

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static_proxy • JavaͷclassΛҾ਺ͱͯ͠౉͠   JavaͷιʔείʔυΛੜ੒͢Δ • Activity͸͜ͷϝιουͷ໭Γ஋Λܧঝ͢Δ • XMLͳͲίʔυҎ֎͔Β΋ࢀর͞ΕΔͨΊ   ͍ͬͨΜJavaʹ͢Δඞཁ͕͋ΔͱࢥΘΕΔ

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static_proxyͷαϯϓϧ # <略> class MainActivity(static_proxy(AppCompatActivity)): # <略>

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dynamic_proxy • JavaͷinterfaceΛҾ਺ͱͯ͠౉͠   ࣮ߦ࣌ʹಈతʹJavaͷΫϥεΛੜ੒͢Δ • ಺෦Ͱ͸java.lang.reﬂect.ProxyΛར༻͍ͯ͠Δ • AndroidͰ͸interfaceΛଟ༻͢ΔͨΊ   ඇৗʹॏཁʹͳΔؔ਺

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dynamic_proxyͷαϯϓϧ # <略> @Override(jvoid, [Bundle]) def onCreate(self, state): AppCompatActivity.onCreate(self, state) self.setContentView(R.layout.activity_main) class Listener(dynamic_proxy(View.OnClickListener)): def onClick(self, view): # クリック時の処理 self.findViewById(R.id.button).setOnClickListener(Listener())

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Pythonύοέʔδͷಋೖ • ΞϓϦϨϕϧͷbuild.gradle಺ʹಋೖ͢ΔύοέʔδΛྻڍ͢Δ • ެࣜαΠτᐌ͘PyPIͷ্Ґ1000ύοέʔδத   88%͸ΠϯετʔϧՄೳ • ChaquopyͷαʔόʔͰҰ෦ύοέʔδͷwheelϑΝΠϧΛఏڙ • طଘͷAndroid޲͚ύοέʔδͰ͸࣮ݱෆՄೳͳػೳΛ   ఏڙ͢Δํ޲ʹৼΓ੾͍ͬͯΔҹ৅ (ݸਓͷײ૝Ͱ͢)

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Android্Ͱಈ͘pandas from android.os import Bundle from android.support.v7.app import AppCompatActivity from java import jvoid, Override, static_proxy import pandas as pd class MainActivity(static_proxy(AppCompatActivity)): @Override(jvoid, [Bundle]) def onCreate(self, state): AppCompatActivity.onCreate(self, state) self.setContentView(R.layout.activity_main) url = "http://npb.jp/bis/players/81085115.html" df = pd.read_html(url)[1].query('年度 == 年度') Log.d("PyConJP", str(df['本塁打'].sum()))

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ϥΠηϯεྉۚ • ΦʔϓϯιʔεͰͷར༻͸ແྉ • ΫϩʔζυιʔεͰͷར༻͸   ։ൃऀ਺ʹԠͨ͡ϥΠηϯεܖ໿͕ඞཁ • 1ΞϓϦͷΈ༗ޮͳϥΠηϯε $39/ਓ • ΞϓϦ਺ແ੍ݶͷϥΠηϯε $79/ਓ

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Positive ! • ಋೖ͕༰қ • Java / Pythonͷύοέʔδͱ࿈ܞ͕Մೳ • Java / KotlinʹΑΔΞϓϦ։ൃͷ஌ݟΛ   ΄΅ͦͷ··׆͔͢͜ͱ͕Ͱ͖Δ

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Negative $ • ແྉͰ͸ͳ͍ • ϓϩΩγΛ௨ͨ͠Ϋϥεͷิ׬ʹਏΈ͕͋Δ • ·ΔͰJava΍KotlinΛॻ͍͍ͯΔؾ෼ʹͳΔ

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͓·͚

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੯͘͠΋બ֎ • BeeWare • PySide for Android

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BeeWare • PythonʹΑΔΫϩεϓϥοτϑΥʔϜ։ൃ؀ڥ • Mac / Windows / Linux / iPhone / iPad / Android   AppleTV / tvOSʹରԠ • Android͸VOCͱͷ࿈ܞͰಈ࡞͢Δ • PythonόΠτίʔυΛJavaόΠτίʔυʹม׵

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BeeWareબ֎ͷཧ༝ • Android Studio 3ܥͰಈ࡞͠ͳ͍ • Apple੡඼༏ઌͷํ਑Λެݴ͓ͯ͠Γ   ରԠ͞ΕΔ·Ͱ͕͔͔࣌ؒΓͦ͏

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PySide for Android • PySide (QtͷPythonόΠϯσΟϯά) ʹΑΔ   AndroidΞϓϦ։ൃ؀ڥ • Qtͱ͍͏࣮੷ͷ͋ΔGUIϥΠϒϥϦΛ   AndroidͰར༻͢Δ͜ͱ͕Ͱ͖Δ

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PySide for Androidબ֎ͷཧ༝ • Android্Ͱಈ͔ͤ·ͤΜͰͨ͠…… • ΋͠஌ݟΛ͓࣋ͪͷํ͕͍Βͬ͠ΌͬͨΒ   ΞυόΠεΛ͍͚ͨͩΔͱ޾͍Ͱ͢

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·ͱΊ

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React Native + Transcrypt • ࣮੷ͷ͋ΔReact Nativeʹ৐͔ͬΔ͜ͱ͕Ͱ͖Δ • React NativeΛૉͷJavaScriptͰ   ॻ͍͍ͯΔͷͰ͋Ε͹࠾༻ͯ͠΋ྑ͍͔΋ • ࢒೦ͳ͕ΒTypeScript౳ͷ༗ྗͳAltJSΛ   ஔ͖׵͑Δ΄ͲͷΠϯύΫτ͸……

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Kivy • ଞݴޠʹҾ͖ͣΒΕΔ͜ͱͷͳ͍   PythonicͳAndroid։ൃ͕Ͱ͖Δ • ։ൃ͕׆ൃͰࠓޙʹظ଴͕࣋ͯΔ • Androidʹؔͯ͠͸   ୺຤ͷεϖοΫ͕௥͍͍͍ͭͯͳ͍͔΋

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Chaquopy • ࣮༻ੑͰ͸τοϓΫϥε • طଘͷAndroid։ൃͷ஌ࣝΛ   ͦͷ··׆͔ͤΔͷ͸େ͖͍ • ϥΠηϯεྉ͕ۚ໰୊ʹͳΒͳ͚Ε͹   ༗ྗͳબ୒ࢶʹͳΔ͸ͣ

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࠷ޙʹ • ʮPythonͰAndroidΞϓϦ։ൃ͸ݫ͍͠ʯ   ͱ͍͏݁࿦ʹ͢Δͭ΋ΓͰCfPΛఏग़͕ͨ͠   ͍͍ҙຯͰཪ੾ΒΕͨ • Android Studio͸αΠζ͕େ͖͍ͷͰ   ձ৔ͷWi-FiͰ͸μ΢ϯϩʔυ͠ͳ͍ͰͶʂ

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͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠