title: Python date generation
body: <p>I want to write a python script that generate the following date-formate: Months / day / hour / minutes in a 10min resolution. For example: 1, 1 ,1 ,10 is 1.Jan at 00:10:</p>
  
  <pre><code>import numpy as np
  size = (2190,4)
  epw = np.zeros(size)
  k = 0 # counter
  
  year= [31,28,31,30,31,30,31,31,30,31,30,31]
  for months in year:
      for day in months:
          for hour in range(1,25):
              for minute in range(1,7):
                  epw[k,0] = months
                  epw[k,1] = day
                  epw[k,2] = hour
                  epw[k,3] = minute *10
                  k=k+1
  </code></pre>
  
  <p>I got the error message: "'int' object is not iterable".
  Is this even a proper method? If yes, do you have an idea how to fix the error?</p>
  
  <p>Thank you very much</p>