relationalai.std.strings.strip()
strip(string: str|Producer) -> Expression
Removes leading and trailing whitespace from a string.
If string
is a Producer
, then strip()
also acts as a filter and removes non-string values from the producer.
Must be called in a rule or query context.
Parameters
Section titled “Parameters”Name | Type | Description |
---|---|---|
string | Producer or Python str object | The string to remove whitespace from. |
Returns
Section titled “Returns”An Expression
object.
Example
Section titled “Example”Use strip()
to remove leading and trailing whitespace from a string:
import relationalai as raifrom relationalai.std import alias, strings
# =====# SETUP# =====
model = rai.Model("MyModel")Person = model.Type("Person")
with model.rule(): Person.add(id=1).set(raw_name=" Alice") Person.add(id=2).set(raw_name="Bob ") Person.add(id=3).set(raw_name=" Carol ") Person.add(id=4).set(raw_name=-1) # Non-string raw_name
# =======# EXAMPLE# =======
# Set a name property equal to raw_name with leading and trailing whitespace removed.with model.rule(): person = Person() person.set(name=strings.strip(person.raw_name))
# Since strip() filters out non-string values, the name property is not set for# the person with id=4.with model.query() as select: person = Person() response = select(person.id, person.name)
print(response.results)# id name# 0 1 Alice# 1 2 Bob# 2 3 Carol# 3 4 NaN