code: def dmp_compose(f, g, u, K):
      """
      Evaluate functional composition ``f(g)`` in ``K[X]``.
  
      Examples
      ========
  
      >>> from sympy.polys import ring, ZZ
      >>> R, x,y = ring("x,y", ZZ)
  
      >>> R.dmp_compose(x*y + 2*x + y, y)
      y**2 + 3*y
  
      """
      if not u:
          return dup_compose(f, g, K)
  
      if dmp_zero_p(f, u):
          return f
  
      h = [f[0]]
  
      for c in f[1:]:
          h = dmp_mul(h, g, u, K)
          h = dmp_add_term(h, c, 0, u, K)
  
      return h
  
imports: from sympy.polys.densearith import dup_add_term, dmp_add_term, dup_lshift, dup_add, dmp_add, dup_sub, dmp_sub, dup_mul, dmp_mul, dup_sqr, dup_div, dup_rem, dmp_rem, dmp_expand, dup_mul_ground, dmp_mul_ground, dup_quo_ground, dmp_quo_ground, dup_exquo_ground, dmp_exquo_ground
  from sympy.polys.densebasic import dup_strip, dmp_strip, dup_convert, dmp_convert, dup_degree, dmp_degree, dmp_to_dict, dmp_from_dict, dup_LC, dmp_LC, dmp_ground_LC, dup_TC, dmp_TC, dmp_zero, dmp_ground, dmp_zero_p, dup_to_raw_dict, dup_from_raw_dict, dmp_zeros
  from sympy.polys.polyerrors import MultivariatePolynomialError, DomainError
  from sympy.utilities import variations
  from math import ceil, log
label_desc: Use image node_id 34 for calling a global function with example usage: dmp_compose(f, g, u, K) and returns: h, dup_compose, f