startswith

relationalai.semantics.std.strings

startswith(s: StringValue, prefix: StringValue) -> Expression

Check whether s starts with prefix.

Parameters

• s

  (StringValue) - The string to check.

• prefix

  (StringValue) - The prefix to check for.

Returns

• Expression - An Expression that evaluates to true if s starts with prefix.

Examples

Filter strings that start with a prefix:

>>> select(Person.name).where(strings.startswith(Person.last_name, Person.name))

Referenced By

RelationalAI Documentation
└──  Build With RelationalAI
    └──  Understand how PyRel works > Use advanced reasoning > Rules-based reasoning
        └──  Work with strings
            └──  Filter facts with text conditions