Formatting a data structure into a comma-separated list of arguments

result = ''
 args = ['a', 'b', 'c', 'd']

 i = 0
 for arg in args:
     if i != 0:    result += arg
     else:         result += arg + ', '
     i += 1

 result = 'function (' + result + ')

'function(%s)' % ', '.join(args)

'function(a, b, c, d)'

result = 'function (%s)' % ', '.join(map(str,args))

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: sequence item 0: expected string, int found

>>> d = {'d':5, 'f':6.0, 'r':"BOB"}
>>> ','.join(d)
'r,d,f'

>>> d = {'d':5, 'f':6.0, 'r':"BOB"}
>>> result = 'function (%s)' % ', '.join(map(str, d.values()))
>>> result
'function (BOB, 5, 6.0)'

>>> l = list()
>>> for val in d.values():
...   try:
...     v = float(val) #half-decent way of checking if something is an int, float, boolean
...     l.append(val) #if it was, then append the original type to the list
...   except:
...     #wasn't a number, assume it's a string and surround with quotes
...     l.append(""" + val + """)
...
>>> result = 'function (%s)' % ', '.join(map(str, l))
>>> result
'function ("BOB", 5, 6.0)'