old_contents: #!usr/bin/python
  
  #############################################################################################################
  #																											#
  # Author : P.C ROY																							#
  # Date & time : 06-05-2016 01:40:00																			#
  # Problem : Find the real root of equation x^3-x-4 = 0 using bisection method concept up to 3 decimal place	#
  # Mathematical solution : https://www.youtube.com/watch?v=DMZj48icYnE										#
  #																											#
  #############################################################################################################
  
  from __future__ import division
  import math   # This will import math module
  
  # Bisection method
  def bs_method():
  	#a = input("Enter the value for a : ")
  	#b = input("Enter the value for b : ")
  	a = 1.701
  	b = 1.801
  	root = approximate_root(a, b)
  
  	print("\n#########################################################################################################\n"
  		  "# \t\t\t\t\tTable : Bisection table\t\t\t\t\t\t#"
  		  "\n#########################################################################################################")
  	print("\tn \t| a \t\t| b \t\t| x \t\t| fx\n"
  		  "---------------------------------------------------------------------------------------------------------")
  
  	count = 1
  	while (count <= 11):
  		fx = fx_func(root)
  		print("\t{0} \t| {1} \t| {2} \t| {3} \t| {4}". format(count, a, b, round(root, 4), fx))
  
  		if fx<0:
  			x = approximate_root(root, b)
  			a = round(root, 4)
  			b = b
  		else:
  			x = approximate_root(a, root)
  			a = a
  			b = round(root, 4)
  
  		print("---------------------------------------------------------------------------------------------------------")
  		root = x
  		count = count+ 1
  
  # return the approximate root
  def approximate_root(a, b):
  	x = (a+b)/2
  	return x
  
  # return the value of x^3-x-4
  def fx_func(x):
  	fx = math.pow(x, 3)-x-4 #formula x^3-x-4 = 0
  	return fx
  
  bs_method()
new_contents: #!usr/bin/python
  
  #############################################################################################################
  #
  # Author : P.C ROY
  # Date & time : 06-05-2016 01:40:00
  # Problem : Find the real root of equation x^3-x-4 = 0 using bisection method concept up to 3 decimal place
  # Mathematical solution : https://www.youtube.com/watch?v=DMZj48icYnE
  #
  #############################################################################################################
  
  from __future__ import division
  import math   # This will import math module
  
  # Bisection method
  def bs_method():
  	#a = input("Enter the value for a : ")
  	#b = input("Enter the value for b : ")
  	a = 1.701
  	b = 1.801
  	root = approximate_root(a, b)
  
  	print("\n#########################################################################################################\n"
  		  "# \t\t\t\t\tTable : Bisection table\t\t\t\t\t\t#"
  		  "\n#########################################################################################################")
  	print("\tn \t| a \t\t| b \t\t| x \t\t| fx\n"
  		  "---------------------------------------------------------------------------------------------------------")
  
  	count = 1
  	while (count <= 11):
  		fx = fx_func(root)
  		print("\t{0} \t| {1} \t| {2} \t| {3} \t| {4}". format(count, a, b, round(root, 4), fx))
  
  		if fx<0:
  			x = approximate_root(root, b)
  			a = round(root, 4)
  			b = b
  		else:
  			x = approximate_root(a, root)
  			a = a
  			b = round(root, 4)
  
  		print("---------------------------------------------------------------------------------------------------------")
  		root = x
  		count = count+ 1
  
  # return the approximate root
  def approximate_root(a, b):
  	x = (a+b)/2
  	return x
  
  # return the value of x^3-x-4
  def fx_func(x):
  	fx = math.pow(x, 3)-x-4 #formula x^3-x-4 = 0
  	return fx
  
  bs_method()
subject: remove # from author comment