class_docstr: Computes the natural logarithm of a number.
  
  Examples:
      >>> log = NaturalLogarithm()
      >>> results = log([1.0, np.e]).tolist()
      >>> results = [round(x, 2) for x in results]
      >>> results
      [0.0, 1.0]
code: def get_function(self):
      return np.log
  
file_path: featuretools/featuretools/primitives/standard/transform/numeric/natural_logarithm.py
imports: import numpy
  from woodwork.column_schema import ColumnSchema
  from woodwork.logical_types import Double
  from featuretools.primitives.base import TransformPrimitive
  from featuretools.utils.gen_utils import Library
label_desc: Use image node_id 1 for calling the NaturalLogarithm obj's underlying member method code with example usage: obj.get_function() and returns: np