docstr: Test adding NumericalExpressions with >10 inputs.
docstr_tok: ["Test","adding","NumericalExpressions","with",">","10","inputs","."]
code: def test_many_inputs(self):
      """
      Test adding NumericalExpressions with >10 inputs.
      """
      # Create an initial NumericalExpression by adding two factors together.
      f = self.f
      expr = f + f
  
      self.fake_raw_data = {f: full((5, 5), 0, float)}
      expected = 0
  
      # Alternate between adding and subtracting factors. Because subtraction
      # is not commutative, this ensures that we are combining factors in the
      # correct order.
      ops = (add, sub)
  
      for i, name in enumerate(ascii_uppercase):
          op = ops[i % 2]
          NewFactor = type(
              name,
              (Factor,),
              dict(dtype=float64_dtype, inputs=(), window_length=0),
          )
          new_factor = NewFactor()
  
          # Again we need a NumericalExpression, so add two factors together.
          new_expr = new_factor + new_factor
          self.fake_raw_data[new_factor] = full((5, 5), i + 1, float)
          expr = op(expr, new_expr)
  
          # Double the expected output since each factor is counted twice.
          expected = op(expected, (i + 1) * 2)
  
      self.check_output(expr, full((5, 5), expected, float))
  
imports: from itertools import permutations
  from operator import add, ge, gt, le, lt, methodcaller, mul, ne, sub
  from string import ascii_uppercase
  from unittest import TestCase
  import numpy
  from numpy import arange, array, eye, float64, full, isnan, zeros
  from pandas import DataFrame, date_range, Int64Index
  from catalyst.pipeline import Factor, Filter
  from catalyst.pipeline.expression import NumericalExpression, NUMEXPR_MATH_FUNCS
  from catalyst.testing import check_allclose
  from catalyst.utils.numpy_utils import datetime64ns_dtype, float64_dtype
label_desc: Use image node_id 6 for calling the NumericalExpressionTestCase obj's underlying member method code with example usage: obj.test_many_inputs() without return types