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Given the following text description, write Python code to implement the functionality described.
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Description:
Count number of subsets whose median is also present in the same subset
Python3 implementation of the approach ; Function to store pascal triangle in 2 - d array ; Function to return a raised to the power n with complexity O ( log ( n ) ) ; Function to return the number of sub - sets whose median is also present in the set ; Number of odd length sub - sets ; Sort the array ; Checking each element for leftmost middle element while they are equal ; Calculate the number of elements in right of rightmost middle element ; Calculate the number of elements in left of leftmost middle element ; Add selected even length subsets to the answer ; Driver code

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Python Code:
mod = 1000000007 
 arr =[[ None for i in range(1001 ) ] for j in range(1001 ) ] 
 def Preprocess() : 
	 arr[0 ][0 ] = 1 
 for i in range(1 , 1001 ) : 
	 arr[i ][0 ] = 1 
 for j in range(1 , i ) : 
	 arr[i ][j ] =(arr[i - 1 ][j - 1 ] + arr[i - 1 ][j ] ) % mod 
  arr[i ][i ] = 1 
   def powmod(a , n ) : 
	 if not n : 
	 return 1 
  pt = powmod(a , n // 2 ) 
 pt =(pt * pt ) % mod 
 if n % 2 : 
	 return(pt * a ) % mod 
  else : 
	 return pt 
   def CountSubset(val , n ) : 
	 ans = powmod(2 , n - 1 ) 
 val . sort() 
 for i in range(0 , n ) : 
	 j = i + 1 
 while j < n and val[j ] == val[i ] : 
	 r = n - 1 - j 
 l = i 
 ans =(ans + arr[l + r ][l ] ) % mod 
 j += 1 
   return ans 
  if __name__== "__main __": 
	 Preprocess() 
 val =[2 , 3 , 2 ] 
 n = len(val ) 
 print(CountSubset(val , n ) ) 
 
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