def testIssue14_execute(self):
'''
https://github.com/WolfgangFahl/pyLoDStorage/issues/14
offer execute wrapper directly via sqlDB
'''
sqlDB=SQLDB()
ddl="""
CREATE TABLE contacts (
contact_id INTEGER PRIMARY KEY,
first_name TEXT NOT NULL,
last_name TEXT NOT NULL
)
"""
sqlDB.execute(ddl)
tableList=sqlDB.getTableList()
if self.debug:
print(tableList)
self.assertEqual(1,len(tableList))
self.assertEqual("contacts",tableList[0]['name'])
def testCopy(self):
'''
test copying databases into another database
'''
dbFile="/tmp/DAWT_Sample3x1000.db"
copyDB=SQLDB(dbFile)
for sampleNo in range(3):
listOfRecords=Sample.getSample(1000)
self.checkListOfRecords(listOfRecords, 'Sample_%d_1000' %sampleNo, 'pKey',doClose=False)
self.sqlDB.copyTo(copyDB)
size=os.stat(dbFile).st_size
if self.debug:
print ("size of copy DB is %d" % size)
self.assertTrue(size>70000)
tableList=copyDB.getTableList()
if self.debug:
print(tableList)
for sampleNo in range(3):
self.assertEqual('Sample_%d_1000' %sampleNo,tableList[sampleNo]['name'])
# check that database is writable
# https://stackoverflow.com/a/44707371/1497139
copyDB.execute("pragma user_version=0")
class Locator(object):
'''
location handling
'''
# singleton instance
locator=None
def __init__(self, db_file=None,correctMisspelling=False,debug=False):
'''
Constructor
Args:
db_file(str): the path to the database file
correctMispelling(bool): if True correct typical misspellings
debug(bool): if True show debug information
'''
self.debug=debug
self.correctMisspelling=correctMisspelling
self.db_path=os.path.dirname(os.path.realpath(__file__))
self.db_file = db_file or self.db_path+"/locs.db"
self.view="GeoLite2CityLookup"
self.sqlDB=SQLDB(self.db_file,errorDebug=True)
self.getAliases()
self.dbVersion="2020-09-27 16:48:09"
@staticmethod
def resetInstance():
Locator.locator=None
@staticmethod
def getInstance(correctMisspelling=False,debug=False):
'''
get the singleton instance of the Locator. If parameters are changed on further calls
the initial parameters will still be in effect since the original instance will be returned!
Args:
correctMispelling(bool): if True correct typical misspellings
debug(bool): if True show debug information
'''
if Locator.locator is None:
Locator.locator=Locator(correctMisspelling=correctMisspelling,debug=debug)
return Locator.locator
def locateCity(self,places):
'''
locate a city, region country combination based on the given wordtoken information
Args:
places(list): a list of places derived by splitting a locality e.g. "San Francisco, CA"
leads to "San Francisco", "CA"
Returns:
City: a city with country and region details
'''
# make sure the database is populated
self.populate_db()
country=None
cities=[]
regions=[]
# loop over all word elements
for place in places:
place=place.strip()
if place in self.aliases:
place=self.aliases[place]
foundCountry=self.getCountry(place)
if foundCountry is not None:
country=foundCountry
foundCities=self.cities_for_name(place)
cities.extend(foundCities)
foundRegions=self.regions_for_name(place)
regions.extend(foundRegions)
foundCity=self.disambiguate(country, regions, cities)
return foundCity
def isISO(self,s):
'''
check if the given string is an ISO code
Returns:
bool: True if the string is an ISO Code
'''
m=re.search(r"^([A-Z]{1,2}\-)?[0-9A-Z]{1,3}$",s)
result=m is not None
return result
def disambiguate(self,country,regions,cities,byPopulation=True):
'''
try determining country, regions and city from the potential choices
Args:
country(Country): a matching country found
regions(list): a list of matching Regions found
cities(list): a list of matching cities found
Return:
City: the found city or None
'''
if self.debug:
print("countries: %s " % country)
print("regions: %s" % "\n\t".join(str(r) for r in regions))
print("cities: %s" % "\n\t".join(str(c) for c in cities))
foundCity=None
# is the city information unique?
if len(cities)==1:
foundCity=cities[0]
else:
if len(cities)>1:
if country is not None:
for city in cities:
if self.debug:
print("city %s: " %(city))
if city.country.iso==country.iso:
foundCity=city
break
if foundCity is None and len(regions)>0:
for region in regions:
for city in cities:
if city.region.iso==region.iso and not city.region.name==city.name:
foundCity=city
break;
if foundCity is not None:
break
if foundCity is None and byPopulation:
foundCity=max(cities,key=lambda city:0 if city.population is None else city.population)
pass
return foundCity
def cities_for_name(self, cityName):
'''
find cities with the given cityName
Args:
cityName(string): the potential name of a city
Returns:
a list of city records
'''
cities=[]
for column in ['name','wikidataName']:
cityRecords=self.places_by_name(cityName, column)
for cityRecord in cityRecords:
cities.append(City.fromGeoLite2(cityRecord))
return cities
def regions_for_name(self, region_name):
'''
get the regions for the given region_name (which might be an ISO code)
Args:
region_name(string): region name
Returns:
list: the list of cities for this region
'''
regions=[]
if self.isISO(region_name):
columnName="regionIsoCode"
else:
columnName='regionLabel'
query="SELECT * from regions WHERE %s = (?)" % (columnName)
params=(region_name,)
regionRecords=self.sqlDB.query(query,params)
for regionRecord in regionRecords:
regions.append(Region.fromWikidata(regionRecord))
return regions
def correct_country_misspelling(self, name):
'''
correct potential misspellings
Args:
name(string): the name of the country potentially misspelled
Return:
string: correct name of unchanged
'''
cur_dir = os.path.dirname(os.path.realpath(__file__))
with open(cur_dir + "/data/ISO3166ErrorDictionary.csv") as info:
reader = csv.reader(info)
for row in reader:
if name in remove_non_ascii(row[0]):
return row[2]
return name
def is_a_country(self, name):
'''
check if the given string name is a country
Args:
name(string): the string to check
Returns:
True: if pycountry thinks the string is a country
'''
country=self.getCountry(name)
result=country is not None
return result
def getCountry(self,name):
'''
get the country for the given name
Args:
name(string): the name of the country to lookup
Returns:
country: the country if one was found or None if not
'''
if self.isISO(name):
pcountry=pycountry.countries.get(alpha_2=name)
else:
if self.correctMisspelling:
name = self.correct_country_misspelling(name)
pcountry=pycountry.countries.get(name=name)
country=None
if pcountry is not None:
country=Country.fromPyCountry(pcountry)
#if country is None:
# query="SELECT * FROM countries WHERE countryLabel = (?)"""
# params=(name,)
# countryRecords=self.sqlDB.query(query,params)
# if len(countryRecords)>0:
# pass
return country
def getView(self):
'''
get the view to be used
Returns:
str: the SQL view to be used for CityLookups e.g. GeoLite2CityLookup
'''
view=self.view
return view
def places_by_name(self, placeName, columnName):
'''
get places by name and column
Args:
placeName(string): the name of the place
columnName(string): the column to look at
'''
if not self.db_has_data():
self.populate_db()
view=self.getView()
query='SELECT * FROM %s WHERE %s = (?)' % (view,columnName)
params=(placeName,)
cities=self.sqlDB.query(query,params)
return cities
def getGeolite2Cities(self):
'''
get the Geolite2 City-Locations as a list of Dicts
Returns:
list: a list of Geolite2 City-Locator dicts
'''
cities=self.readCSV("GeoLite2-City-Locations-en.csv")
return cities
def readCSV(self,fileName):
records=[]
cur_dir = os.path.dirname(os.path.realpath(__file__))
csvfile="%s/data/%s" % (cur_dir,fileName)
with open(csvfile) as info:
reader = csv.DictReader(info)
for row in reader:
records.append(row)
return records
def recreateDatabase(self):
'''
recreate my lookup database
'''
print("recreating database ... %s" % self.db_file)
self.populate_db(force=True)
def populate_db(self,force=False):
'''
populate the cities SQL database which caches the information from the GeoLite2-City-Locations.csv file
Args:
force(bool): if True force a recreation of the database
'''
hasData=self.db_has_data()
if force:
self.populate_Cities(self.sqlDB)
self.populateFromWikidata(self.sqlDB)
self.getWikidataCityPopulation(self.sqlDB)
self.createViews(self.sqlDB)
self.populate_Version(self.sqlDB)
elif not hasData:
url="http://wiki.bitplan.com/images/confident/locs.db.gz"
zipped=self.db_file+".gz"
print("Downloading %s from %s ... this might take a few seconds" % (zipped,url))
urllib.request.urlretrieve(url,zipped)
print("unzipping %s from %s" % (self.db_file,zipped))
with gzip.open(zipped, 'rb') as gzipped:
with open(self.db_file, 'wb') as unzipped:
shutil.copyfileobj(gzipped, unzipped)
if not os.path.isfile(self.db_file):
raise("could not create lookup database %s" % self.db_file)
def populate_Version(self,sqlDB):
'''
populate the version table
Args:
sqlDB(SQLDB): target SQL database
'''
versionList=[{"version":self.dbVersion}]
entityInfo=sqlDB.createTable(versionList,"Version","version",withDrop=True)
sqlDB.store(versionList,entityInfo)
def getAliases(self):
'''
get the aliases hashTable
'''
aliases=self.readCSV("aliases.csv")
self.aliases={}
for alias in aliases:
self.aliases[alias['name']]=alias['alias']
def populateFromWikidata(self,sqlDB):
'''
populate countries and regions from Wikidata
Args:
sqlDB(SQLDB): target SQL database
'''
self.populate_Countries(sqlDB)
self.populate_Regions(sqlDB)
return
# ignore the following code as of 2020-09-26
self.populate_Cities_FromWikidata(sqlDB)
viewDDLs=["DROP VIEW IF EXISTS WikidataCityLookup","""
CREATE VIEW WikidataCityLookup AS
SELECT
name AS name,
regionLabel as regionName,
regionIsoCode as regionIsoCode,
countryLabel as countryName,
countryIsoCode as countryIsoCode,
cityPopulation as population,
countryGDP_perCapita as gdp
FROM City_wikidata
"""]
# subdivision_1_name AS regionName,
# subdivision_1_iso_code as regionIsoCode,
# country_name AS countryName,
# country_iso_code as countryIsoCode
for viewDDL in viewDDLs:
self.sqlDB.execute(viewDDL)
def populate_Countries(self,sqlDB):
'''
populate database with countries from wikiData
Args:
sqlDB(SQLDB): target SQL database
'''
print("retrieving Country data from wikidata ... (this might take a few seconds)")
wikidata=Wikidata()
wikidata.getCountries()
entityInfo=sqlDB.createTable(wikidata.countryList,"countries",None,withDrop=True,sampleRecordCount=200)
sqlDB.store(wikidata.countryList,entityInfo,fixNone=True)
def populate_Regions(self,sqlDB):
'''
populate database with regions from wikiData
Args:
sqlDB(SQLDB): target SQL database
'''
print("retrieving Region data from wikidata ... (this might take a minute)")
wikidata=Wikidata()
wikidata.getRegions()
entityInfo=sqlDB.createTable(wikidata.regionList[:5000],"regions",primaryKey=None,withDrop=True)
sqlDB.store(wikidata.regionList,entityInfo,fixNone=True)
def populate_Cities_FromWikidata(self,sqlDB):
'''
populate the given sqlDB with the Wikidata Cities
Args:
sqlDB(SQLDB): target SQL database
'''
dbFile=self.db_path+"/City_wikidata.db"
if not os.path.exists(dbFile):
print("Downloading %s ... this might take a few seconds" % dbFile)
dbUrl="http://wiki.bitplan.com/images/confident/City_wikidata.db"
urllib.request.urlretrieve(dbUrl,dbFile)
wikiCitiesDB=SQLDB(dbFile)
wikiCitiesDB.copyTo(sqlDB)
def getWikidataCityPopulation(self,sqlDB,endpoint=None):
'''
Args:
sqlDB(SQLDB): target SQL database
endpoint(str): url of the wikidata endpoint or None if default should be used
'''
dbFile=self.db_path+"/city_wikidata_population.db"
rawTableName="cityPops"
# is the wikidata population database available?
if not os.path.exists(dbFile):
# shall we created it from a wikidata query?
if endpoint is not None:
wikidata=Wikidata()
wikidata.endpoint=endpoint
cityList=wikidata.getCityPopulations()
wikiCitiesDB=SQLDB(dbFile)
entityInfo=wikiCitiesDB.createTable(cityList[:300],rawTableName,primaryKey=None,withDrop=True)
wikiCitiesDB.store(cityList,entityInfo,fixNone=True)
else:
# just download a copy
print("Downloading %s ... this might take a few seconds" % dbFile)
dbUrl="http://wiki.bitplan.com/images/confident/city_wikidata_population.db"
urllib.request.urlretrieve(dbUrl,dbFile)
# (re) open the database
wikiCitiesDB=SQLDB(dbFile)
# check whether the table is populated
tableList=sqlDB.getTableList()
tableName="citiesWithPopulation"
if self.db_recordCount(tableList, tableName)<10000:
# check that database is writable
# https://stackoverflow.com/a/44707371/1497139
sqlDB.execute("pragma user_version=0")
# makes sure both tables are in target sqlDB
wikiCitiesDB.copyTo(sqlDB)
# create joined table
sqlQuery="""
select
geoname_id,
city_name,
cp.cityLabel,
country_iso_code,
country_name,
subdivision_1_iso_code,
subdivision_1_name,
cp.city as wikidataurl,
cp.cityPop
from cities c
join cityPops cp
on c.geoname_id=cp.geoNameId
union
select
geoNameId as geoname_id,
null as city_name,
cityLabel,
countryIsoCode as country_iso_code,
countryLabel as country_name,
null as subdivision_1_iso_code,
null as subdivision_1_name,
city as wikidataurl,
cityPop
from cityPops
where cityPop is not Null
group by geoNameId
order by cityPop desc
"""
cityList=sqlDB.query(sqlQuery)
entityInfo=sqlDB.createTable(cityList,tableName,primaryKey=None,withDrop=True,sampleRecordCount=500)
sqlDB.store(cityList,entityInfo,fixNone=True)
# remove raw Table
#sqlCmd="DROP TABLE %s " %rawTableName
#sqlDB.execute(sqlCmd)
def populate_Cities(self,sqlDB):
'''
populate the given sqlDB with the Geolite2 Cities
Args:
sqlDB(SQLDB): the SQL database to use
'''
cities=self.getGeolite2Cities()
entityName="cities"
primaryKey="geoname_id"
entityInfo=sqlDB.createTable(cities[:100],entityName,primaryKey,withDrop=True)
sqlDB.store(cities,entityInfo,executeMany=False)
def createViews(self,sqlDB):
viewDDLs=["DROP VIEW IF EXISTS GeoLite2CityLookup","""
CREATE VIEW GeoLite2CityLookup AS
SELECT
city_name AS name,
cityLabel AS wikidataName,
wikidataurl,
cityPop,
subdivision_1_name AS regionName,
subdivision_1_iso_code as regionIsoCode,
country_name AS countryName,
country_iso_code as countryIsoCode
FROM citiesWithPopulation
"""]
for viewDDL in viewDDLs:
sqlDB.execute(viewDDL)
def db_recordCount(self,tableList,tableName):
'''
count the number of records for the given tableName
Args:
tableList(list): the list of table to check
tableName(str): the name of the table to check
Returns
int: the number of records found for the table
'''
tableFound=False
for table in tableList:
if table['name']==tableName:
tableFound=True
break
count=0
if tableFound:
query="SELECT Count(*) AS count FROM %s" % tableName
countResult=self.sqlDB.query(query)
count=countResult[0]['count']
return count
def db_has_data(self):
'''
check whether the database has data / is populated
Returns:
boolean: True if the cities table exists and has more than one record
'''
tableList=self.sqlDB.getTableList()
hasCities=self.db_recordCount(tableList,"citiesWithPopulation")>10000
hasCountries=self.db_recordCount(tableList,"countries")>100
hasRegions=self.db_recordCount(tableList,"regions")>1000
hasVersion=self.db_recordCount(tableList,"Version")==1
versionOk=False
if hasVersion:
query="SELECT version from Version"
dbVersionList=self.sqlDB.query(query)
versionOk=dbVersionList[0]['version']==self.dbVersion
#hasWikidataCities=self.db_recordCount(tableList,'City_wikidata')>100000
ok=hasVersion and versionOk and hasCities and hasRegions and hasCountries
return ok
