Write a python function to convert complex numbers to polar coordinates.
import cmath  
def convert(numbers):    
  num = cmath.polar(numbers)  
  return (num) 
<s>[INST]<<SYS>>Given a task and its code, generate test cases for the code.<</SYS>>Write a python function to convert complex numbers to polar coordinates.
import cmath  
def convert(numbers):    
  num = cmath.polar(numbers)  
  return (num) [/INST]assert convert(1) == (1.0, 0.0)
assert convert(4) == (4.0,0.0)
assert convert(5) == (5.0,0.0)</s>