class_docstr: This class represents an abstract partition.
  
  A partition is a set of disjoint sets whose union equals a given set.
  
  See Also
  ========
  
  sympy.utilities.iterables.partitions,
  sympy.utilities.iterables.multiset_partitions
docstr: Checks if a partition is less than or equal to
  the other based on rank.
  
  Examples
  ========
  
  >>> from sympy.combinatorics import Partition
  >>> a = Partition([1, 2], [3, 4, 5])
  >>> b = Partition([1], [2, 3], [4], [5])
  >>> a.rank, b.rank
  (9, 34)
  >>> a <= a
  True
  >>> a <= b
  True
code: def __le__(self, other):
      """
      Checks if a partition is less than or equal to
      the other based on rank.
  
      Examples
      ========
  
      >>> from sympy.combinatorics import Partition
      >>> a = Partition([1, 2], [3, 4, 5])
      >>> b = Partition([1], [2, 3], [4], [5])
      >>> a.rank, b.rank
      (9, 34)
      >>> a <= a
      True
      >>> a <= b
      True
      """
      return self.sort_key() <= sympify(other).sort_key()
  
imports: from sympy.core import Basic, Dict, sympify, Tuple
  from sympy.core.numbers import Integer
  from sympy.core.sorting import default_sort_key
  from sympy.core.sympify import _sympify
  from sympy.functions.combinatorial.numbers import bell
  from sympy.matrices import zeros
  from sympy.sets.sets import FiniteSet, Union
  from sympy.utilities.iterables import flatten, group
  from sympy.utilities.misc import as_int
  from collections import defaultdict
label_desc: Use image node_id 6 for calling the Partition obj's underlying member method code with example usage: obj.__le__(other) and returns: unknown