Python: "SyntaxError: invalid syntax" for arithmetic -

this first question on stack overflow, please comment on how improve on asking questions.

this feel pertinent part of code.

#import libraries numpy import * matplotlib.pyplot import *  #leapfrog method def orbit(m1=1.0e30, m2=1.0e24, a=1.0e11, e=0.1):      #conditions     g=6.67*e-11     q=m1/m2     m=m1+m2     r0=(1-e)*a/(1+q)     v0=1/(1+q)sqrt((1+e)/(1-e)*g*m/a) 

when import code receive error:

import hw5redo   file "hw5redo.py", line 12     r0 = (1-e)*a/(1+q)                    ^ syntaxerror: invalid syntax 

also when comment out of code receive:

import hw5redo   file "hw5redo.py", line 12     #r0=(1-e)*a/(1+q)                  ^ syntaxerror: invalid syntax 

i thought comments should not considered syntaxerrors because user only.

@rth right, please check code below, should use * before sqrt function:

def orbit(m1=1.0e30, m2=1.0e24, a=1.0e11, e=0.1):      g = 6.67 * e - 11     q = m1 / m2     m = m1 + m2     r0 = (1 - e) * / (1 + q)     value = (1 + e) / (1 - e) * g * m /     # note value negative in case, , raise warning     print value     v0 = 1 / (1 + q) * sqrt(value) 

hope code helps you.