Intro_1_1.py
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	#!/usr/bin/env python3
	# -- coding: utf-8 --
	"""
	Created on Mon Mar 11 10:13:39 2019

	@author: jecker
	"""

	import AL_Fct as al
	import math
	print("Entrez le nombre de variables n=") #function EnterInt but we might need to specify what int we want: variable, nbr equation,..
	n=input()
	n=al.EnterInt(n)

	print("Votre équation est de la forme")
	al.printEq(n, '')

	def EnterListReal(n): #function enter list of real numbers.
	coeff=input()
	while type(coeff)!=list:
	try:
	coeff=[float(eval(x)) for x in coeff.split(',')]
	if len(coeff)!=n+1:
	print("Vous n'avez pas entré le bon nombre de réels!")
	print("Entrez à nouveau : ")
	coeff=input()
	except:
	print("Ce n'est pas le bon format!")
	print("Entrez à nouveau")
	coeff=input()
	#coeff[abs(coeff)<1e-15]=0 #ensures that 0 is 0.
	return coeff

	print("Entrez les ", n+1," coefficients de l'équations sous le format a1, a2, ..., b")
	coeff=al.EnterListReal(n)

	print("Votre equation est")
	al.printEq(n, coeff)

	#%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

	print("Entrez la solution sous la forme d'une suite de ", n," nombres réels")
	entry=input()
	sol=al.EnterListReal(n-1,entry)

	sol=np.asarray(sol[0:len(sol)])
	al.SolOfEq(sol, coeff,1)
	#%%%%%%%%%%
	#OK works with fractions as well.