Cheuk Ting Ho
Developer advocate / Data Scientist - support open-source and building the community.
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Grab the slides: slides.com/cheukting_ho/be-pythonic/
Cheuk Ting Ho
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Pythonic means code that doesn't just get the syntax right but that follows the conventions of the Python community and uses the language in the way it is intended to be used.
- Stackoverflow
Why can't I just do it in a for-loop?
for i in (i; i < items.length ; i++)
{
n = items[i];
... now do something
}
for i in items:
i.perform_action()
(i.some_attribute for i in items)
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Co-organizer ofΒ
Open Source contribution
Creator of
Volenteer of
Developer Advocate of
SELECT Name from TABLE where Person_ID = (SELECT mother from TABLE where Name="John")
SELECT Name from TABLE where Person_ID = (SELECT mother from TABLE WHERE Person_ID = (SELECT mother from TABLE where Name="John"))
WOQL.and(
WOQL.triple("v:Person", "mother", "v:MotherID"),
WOQL.triple("v:MotherID", "name", "v:MotherName"),
WOQL.triple("v:MotherID", "mother", "v:GrandmotherID"),
WOQL.triple("v:GrandmotherID", "name", "v:GrandmotherName"),
)
a Query Language Client for Pythonistas and Data Scientists
It comes with the Python Client, which you can pip install:
pip install terminusdb-client
Output to DataFrames
pip install terminusdb-client[dataframe]
WOQLDataFrame.result_to_df(result)
Change the result returned form your query into pandas DataFrame
It let's you to "talk" to TerminusDB like this:
import terminusdb_client as woql
from terminusdb_client import WOQLQuery
db_id = "pybike"
client = woql.WOQLClient(server_url = "http://localhost:6363")
client.connect(key="root", account="admin", user="admin")
client.create_database(db_id, accountid="admin", label = "Bike Graph",
description = "Create a graph with bike data")
station_dt = WOQLQuery().doctype("Station",
label="Bike Station",
description="A station where bikes are deposited")
bicycle_dt = WOQLQuery().doctype("Bicycle", label="Bicycle")
journey_dt = (
WOQLQuery().doctype("Journey", label="Journey").
property("start_station", "Station", label="Start Station").
property("end_station", "Station", label="End Station").
property("duration", "integer", label="Journey Duration").
property("start_time", "dateTime", label="Time Started").
property("end_time", "dateTime", label="Time Ended").
property("journey_bicycle", "Bicycle", label="Bicycle Used")
)
schema = station_dt + bicycle_dt + journey_dt
schema.execute(client)
Instead of this:
{
"when": [
{
"true": []
},
{
"and": [
{
"add_quad": [
"scm:Station",
"rdf:type",
"owl:Class",
"db:schema"
]
},
{
"add_quad": [
"scm:Station",
"rdfs:subClassOf",
"tcs:Document",
"db:schema"
]
},
{
"add_quad": [
"scm:Station",
"rdfs:label",
{
"@value": "Bike Station",
"@language": "en"
},
"db:schema"
]
},
{
"add_quad": [
"scm:end_station",
"rdf:type",
"owl:ObjectProperty",
"db:schema"
]
},
{
"add_quad": [
"scm:end_station",
"rdfs:range",
"scm:Station",
"db:schema"
]
},
{
"add_quad": [
"scm:end_station",
"rdfs:domain",
"scm:Journey",
"db:schema"
]
},
{
"and": [
{
"add_quad": [
"scm:start_station",
"rdf:type",
"owl:ObjectProperty",
"db:schema"
]
},
{
"add_quad": [
"scm:start_station",
"rdfs:range",
"scm:Station",
"db:schema"
]
},
{
"add_quad": [
"scm:start_station",
"rdfs:domain",
"scm:Journey",
"db:schema"
]
},
{
"and": [
{
"add_quad": [
"scm:Journey",
"rdf:type",
"owl:Class",
"db:schema"
]
},
{
"add_quad": [
"scm:Journey",
"rdfs:subClassOf",
"tcs:Document",
"db:schema"
]
},
{
"add_quad": [
"scm:Journey",
"rdfs:label",
{
"@value": "Journey",
"@language": "en"
},
"db:schema"
]
}
]
},
{
"add_quad": [
"scm:start_station",
"rdfs:label",
{
"@value": "Start Station",
"@language": "en"
},
"db:schema"
]
}
]
},
{
"add_quad": [
"scm:end_station",
"rdfs:label",
{
"@value": "End Station",
"@language": "en"
},
"db:schema"
]
}
]
}
]
}
(WOQLQuery().doctype("Station")
.label("Bike Station")
.description("A station where bikes are deposited")
)
or
WOQLQuery().doctype("Station",
label="Bike Station",
escription="A station where bikes are deposited")
Chaining:
WOQLQuery().doctype("journey").label("Journey)
or
Multi-parameters:
WOQLQuery().doctype("journey, label="Journey")
JavaScript: WOQL.and()
Python: WOQLQuery().and() ?
"and" is a key word, you dummy!
OK, woql_and then....π
WOQLQuery().woql_and()
* actually you can use the + operator thanks for the overload ability in Python
also happened to: or, not, as, from...
Mass loading data from DataFrame (and csvs)
Smart Query: more fail-proof checks
e.g. check user inputs,
check database version etc...
CLI client (with click?)
Network graph analysing algorithms
Join our sprint in Hacktoberfest!!! - PyCon India, Jupyter Con (maybe) and Numfocus sprint (maybe)
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World of WoqlCraft:
Every Friday 5pm UK time / 7pm Turkish time
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To get the newest updateπ:
Follow us on Twitter: @TerminusDB
Website: https://terminusdb.com/
Join the community at Discord:
https://discord.gg/Gvdqw97
We want to hear from you π
By Cheuk Ting Ho
Developer advocate / Data Scientist - support open-source and building the community.