title: ValueError: need more than 0 values to unpack
body: <p>I am new to python and I am trying make a program that reads a file, and puts the information in its own vectors. the file is an xyz file that looks like this:</p>
  
  <pre><code>45 
  
  Fe -0.055 0.033 -0.047
  N -0.012 -1.496 1.451
  N 0.015 -1.462 -1.372
  N 0.000 1.386 1.481
  N 0.070 1.417 -1.339
  C -0.096 -1.304 2.825
  C 0.028 -1.241 -2.739
  C -0.066 -2.872 1.251
  C -0.0159 -2.838 -1.205
  </code></pre>
  
  <p>Starting from the 3rd line I need to place each in its own vectors, so far I have this:</p>
  
  <pre><code>file=open("Question4.xyz","r+")
  A = []
  B = []
  C = []
  D = []
  counter=0
  for line in file:
      if counter&gt;2: #information on particles start on the 2nd line
          a,b,c,d=line.split()
          A.append(a)
          B.append(float(b))
          C.append(float(c))
          D.append(float(d))
      counter=counter+1
  </code></pre>
  
  <p>I am getting this error:</p>
  
  <pre><code> File "&lt;pyshell#72&gt;", line 3, in &lt;module&gt;
      a,b,c,d=line.split()
  ValueError: need more than 0 values to unpack
  </code></pre>
  
  <p>Any ideas on where I am going wrong?</p>
  
  <p>Thanks in advance!</p>