为什么只打印第一项

Question

Wondering why when I write return arg after the for loop, I get the whole list I put in, but when I return reverse, only the last value in the list I provide prints

def reverse_complement(**seqs):
   for arg in seqs.values():
      reverse=arg[::-1]
   return reverse

print(reverse_complement(a='CGTC', b='ATATAT', c='TATA', d='GCGTCGC'))

gives :

CGCTGCG

Answer 1

Store the results in a list and retund the list .

Use this:

def reverse_complement(**seqs):
   results=[]
   for arg in seqs.values():
      reverse=arg[::-1]
      results.append(reverse)
   return results

print(reverse_complement(a='CGTC', b='ATATAT', c='TATA', d='GCGTCGC'))

['CTGC', 'ATAT', 'TATATA', 'CGCTGCG']

Answer 2

To return the whole sequence (with the keys), return a dict:

def reverse_complement(**seqs):
   reverse_dict = {}
   for key in seqs.keys():
      arg = seqs[key]
      reverse_dict[key] = arg[::-1]
   return reverse_dict

print(reverse_complement(a='CGTC', b='ATATAT', c='TATA', d='GCGTCGC')) 

This gives:

{'a': 'CTGC', 'c': 'ATAT', 'b': 'TATATA', 'd': 'CGCTGCG'}

as the output.