What is the operator.length_hint() method in Python?
What is the operator module?
The operator module is a built-in module in Python. The module provides functions equivalent to the intrinsic operators of Python. For instance, we can use the operator.mul() method for multiplication instead of using the multiplication (*) operator.
The module’s functions come in handy when callable methods are given as arguments to another Python object.
The length_hint() method
The length_hint() method returns an estimate of the number of elements in the given object. The return value of the method will be exact if the given object supports the len() method. Otherwise, the method may overestimate or underestimate the number of elements in the object.
Example
import operatorobj = [1, 2, 3]print("operator.length_hint(%s) = %s" % (obj, operator.length_hint(obj)))obj = "hello educative"print("operator.length_hint(%s) = %s" % (obj, operator.length_hint(obj)))obj = 13print("operator.length_hint(%s) = %s" % (obj, operator.length_hint(obj)))
Explanation
- Line 1: We import the
operatormodule. - Line 5: We invoke the
operator.length_hint()method on a list and print the result. - Line 9: We invoke the
operator.length_hint()method on a string and print the result. - Line 13: We invoke the
operator.length_hint()method on an integer and print the result.
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