How to get a decimal instead of a fraction in sympy?
Question:
I am making a chemistry project for school, I want to use sympy for solving some density and concentration problems.
solveset function returns the value as a fraction, for example:
mL = Symbol("mL")
density = Symbol("p")
mass = 115*g
volume = 100*ml
print(solveset(Eq(density, mass/volume), density))
The output is {23*g/(20*mL)} (fraction) but I want it in the decimal form ({1.15*g/ml})
Answers:
You can use the n() method to evaluate the symbolic results to floats. Note that n is an alias of the evalf method. But first, you probably want to extract the result from the set of solutions:
sol = solveset(Eq(density, mass/volume), density)
sol = list(sol)[0].n()
print(sol)
# 1.15*g/mL
I am making a chemistry project for school, I want to use sympy for solving some density and concentration problems.
solveset function returns the value as a fraction, for example:
mL = Symbol("mL")
density = Symbol("p")
mass = 115*g
volume = 100*ml
print(solveset(Eq(density, mass/volume), density))
The output is {23*g/(20*mL)} (fraction) but I want it in the decimal form ({1.15*g/ml})
You can use the n() method to evaluate the symbolic results to floats. Note that n is an alias of the evalf method. But first, you probably want to extract the result from the set of solutions:
sol = solveset(Eq(density, mass/volume), density)
sol = list(sol)[0].n()
print(sol)
# 1.15*g/mL