code: def __repr__(self):
      return str(self)
  
file_path: fancyimpute/fancyimpute/solver.py
imports: import warnings
  import numpy
  from sklearn.utils import check_array
  from .common import generate_random_column_samples
label_desc: Use image node_id 2 for calling the Solver obj's underlying member method code with example usage: obj.__repr__() and returns: str