using for loop in python to convert two strings into one string -

for example:

mangle('hello','people')->'hpeelolpole'

it meant combine these 2 strings, character character. function:

def mangle(s1,s2):   s1=list(s1)   s2=list(s2)   a=" "   in range(0,min(len(s1),len(s2))):             c in s1:       d in s2:         a=a+c+d         if len(s1)>len(s2):           return a+''.join(s1)[min(len(s1),len(s2)): ]          elif len(s1)<len(s2):            return a+''.join(s2)[min(len(s1),len(s2)): ]          else:            return 

but produces:

hphehohphlhee 

i know problem is:

for c in s1: 　for d in s2: 　　a=a+c+d 

but don't know how fix it

you correct. don't need iterate on both strings. can this:

def mangle(s1, s2):     = ""     in range(min(len(s1), len(s2))):         += s1[i] + s2[i]     if len(s1) > len(s2):         return + s1[min(len(s1), len(s2)):]     elif len(s1) < len(s2):         return + s2[min(len(s1), len(s2)):]     return  assert(mangle('hello','people') == "hpeelolpole") 

this program can written itertools.izip_longest this:

try:     itertools import izip_longest zip  # python 2 except importerror:     itertools import zip_longest zip   # python 3  def mangle(s1, s2):     return "".join(c1 + c2 c1, c2 in zip(s1, s2, fillvalue=''))  assert(mangle('hello','people') == "hpeelolpole")