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I am trying to use the following python code

Solved (Hint by @TheFool): By putting latex() into the print function it works.

from sympy import * from sympy.printing.mathml import mathml init_printing(use_unicode=True) # allow LaTeX printing # independent variables x, y, z = symbols('x y z', real = True) # parameters nu, rho = symbols('nu rho', real = True, constant = True, positive = True) # dependent variables u, v, w = symbols('u v w', real = True, cls = Function) print(latex(diff(u(x,y,z),x)))

The output looks like '\\frac{\\partial}{\\partial x} u{\\left (x,y,z \\right )}'.

How can I remove the additional backslashes and the quotation marks at the beginning and at the end of the output?

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3 Answers 3

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11 
from sympy import Matrix, print_latex X = Matrix([1,2,3]) print_latex(X)

out: \left[\begin{matrix}1\\2\\3\end{matrix}\right]

(only prints out like that if your in a notebook environment)

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4

Have you tried to include:.. ?

from sympy import init_printing init_printing()

check out the ducumentation on sympy`s print options. It looks like the init_printing is the way to go for proper output.

http://docs.sympy.org/latest/tutorial/printing.html

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1 Comment

plus one: Thank you for the hint.
2

When you write the output on a file with

out_file = open("output.txt","w") out_file.write(latex(diff(u(x,y,z),x))) out_file.close()

They will look like you want them.

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