Utils
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The Utils class in Transformations provides a few convenience functions.
isArray(object: value) - boolean
Detects if a python object is an array. Returns True if it is.
from io.hevo.api import Event
from io.hevo.api import Utils
def transform(event):
eventName = event.getEventName()
properties = event.getProperties()
is_field_array = Utils.isArray(properties('field_name'))
...
convertToArray(object: value) - [object]
Converts an object into an array if it is a valid array
from io.hevo.api import Event
from io.hevo.api import Utils
def transform(event):
eventName = event.getEventName()
properties = event.getProperties()
field_as_array = Utils.convertToArray(properties('field_name'))
for i in range(len(field_as_array)):
elem = array[i]
...
isDict(object: value) - boolean
Detects if a python object is a dictionary. Returns True if it is.
from io.hevo.api import Event
from io.hevo.api import Utils
def transform(event):
eventName = event.getEventName()
properties = event.getProperties()
is_field_a_dict = Utils.isDict(properties('field_name'))
...
getType(object: value) - string
Returns type of object.
from io.hevo.api import Event
from io.hevo.api import Utils
def transform(event):
eventName = event.getEventName()
properties = event.getProperties()
someNumber = 10
properties['type'] = Utils.getType(someNumber)
...
properties['type'] = int
replaceUnicode( string: onString, string: replacement ) - string
Returns onString with all unicode characters replaced with replacement
from io.hevo.api import Event
from io.hevo.api import Utils
def transform(event):
eventName = event.getEventName()
properties = event.getProperties()
withUnicode = properties['stringWithUnicode']
properties['withoutUnicode'] = Utils.replaceUnicode(withUnicode," ")
...
properties['withoutUnicode'] will have a space in place of every unicode character
trimUnicode( string: onString ) - string
Returns onString with all unicode characters omitted.
from io.hevo.api import Event
from io.hevo.api import Utils
def transform(event):
eventName = event.getEventName()
properties = event.getProperties()
withUnicode = properties['stringWithUnicode']
properties['withoutUnicode'] = Utils.trimUnicode(withUnicode)
...
properties['withoutUnicode'] will not have any unicode characters.
jsonStringToDict( string: json ) - dict
Converts any json string json to a python dictionary
from io.hevo.api import Event
from io.hevo.api import Utils
def transform(event):
eventName = event.getEventName()
properties = event.getProperties()
jsonString = "{\"City\":\"bangalore\"}"
jsonDict = Utils.jsonStringToDict(jsonString)
...
jsonDict = {\"City\":\"Bangalore\"}
dictToJsonString( dict: dictionary ) - dict
Converts python dictionary to a string.
from io.hevo.api import Event
from io.hevo.api import Utils
def transform(event):
eventName = event.getEventName()
properties = event.getProperties()
dictionary = {"India": "Delhi", "China": "Beijing"} # JsonObject from a source table
jsonStr = Utils.dictToJsonString(dictionary)
...
jsonStr = "{\"India\":\"Delhi\",\"China\":\"Beijing\"}"