# hello.py  example file  indetation and blank lines important
#           simple .py can be without  def main():  
#                                      if __name__ == '__main__':
#                                      main()
import math

def main():
  print "hello from python"  # three ways to print the same line
  print 'hello from python'
  print "hello",
  print "from python"
  a_int=7
  a_float=7.25
  a_real=7.2597256357e+300
  print "a_int=",
  print a_int
  print "a_float=",
  print a_float
  print "a_real=",
  print a_real

  a_list=[7, 7.25, "abc"]
  print "a_list=",
  print a_list
  print "a_list[2]=",
  print a_list[2]
  a_list.append("def")
  print "append=",
  print a_list
  del a_list[1]
  print "delete=",
  print a_list
  print "len(a_list)=",
  print len(a_list)
  print " "

  a_tuple=2, 3, 5, 7   # can not modify
  b_tuple=(2, 3, 5, 7) # same as above
  print "a_tuple=",
  print a_tuple
  print "b_tuple=",
  print b_tuple
  print "b_tuple[2]=",
  print b_tuple[2]
  print " "

  dict={1:'a', 2:'b', 3:'c'} # dictionary key : value
  print "dict=",
  print dict
  dict[5]='e'
  print "dict 5=",
  print dict
  print "dict[3]=", # look up by key
  print dict[3]
  print " "

  z=range(5)
  print "range(5)=",
  print z
  z=range(1,5)
  print "range(1,5)=",
  print z
  z=range(1,7,2)
  print "range(1,7,2)=",
  print z

  x = 0.7071
  print "x = ",
  print x
  print "anyfunct(x) =    note complex result",
  print anyfunct(x)
  # end of main

def anyfunct(x): # thus main can be in front of needed funstions, cmath also
  z = math.cos(x) + 1.0j*math.sin(x) - math.sqrt(x)
  return z


if __name__ == '__main__':
  main()

# end of hello/py see also  test_math.py