title: complex() in Python with complex no as argument
body: <p>In Python, complex (a,b)</p>
  <p>==&gt; a is substituted as real part and b is in the imaginary part i.e (a+bj).</p>
  <p>For ex: complex(3,4) returns (3 + 4j)
  <strong>But,how complex (1,2.0j)   in python returns  -1+0j?</strong></p>