Question: 
Write a function to get the angle of a complex number.


Model's Code:
def angle_complex(z_real, z_imag):
    import cmath
    return cmath.phase(complex(z_real, z_imag))



Sample Correct Code:
import cmath
def angle_complex(a,b):
  cn=complex(a,b)
  angle=cmath.phase(a+b)
  return angle


Asserts:
assert angle_complex(0,1j)==1.5707963267948966 
assert angle_complex(2,1j)==0.4636476090008061
assert angle_complex(0,2j)==1.5707963267948966


Tests:
Test 1 of 3: FAIL: AssertionError()

Test 124 of 974: 92/124 (74.19354838709677%): failed