Simultaneous .replace functionality

Question

I have already converted user input of DNA code (A,T,G,C) into RNA code(A,U,G,C). This was fairly easy

RNA_Code=DNA_Code.replace(\'         


        

Answer 1

Use a translation table:

RNA_compliment = {
    ord('A'): 'U', ord('U'): 'A',
    ord('G'): 'C', ord('C'): 'G'}

RNA_Code.translate(RNA_compliment)

The str.translate() method takes a mapping from codepoint (a number) to replacement character. The ord() function gives us a codepoint for a given character, making it easy to build your map.

Demo:

>>> RNA_compliment = {ord('A'): 'U', ord('U'): 'A', ord('G'): 'C', ord('C'): 'G'}
>>> 'AUUUGCGGCAAA'.translate(RNA_compliment)
'UAAACGCCGUUU'