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A quick and dirty script to translate ASCII into DNA
# A quick and dirty script to translate ASCII into DNA
# by treating DNA's ACGT as a quaternary system
# Base converter credit from
# http://djangosnippets.org/snippets/1431/
class BaseConverter(object):
decimal_digits = "0123456789"
def __init__(self, digits):
self.digits = digits
def from_decimal(self, i):
return self.convert(i, self.decimal_digits, self.digits)
def to_decimal(self, s):
return int(self.convert(s, self.digits, self.decimal_digits))
def convert(self, number, fromdigits, todigits):
# Based on http://code.activestate.com/recipes/111286/
if str(number)[0] == '-':
number = str(number)[1:]
neg = 1
else:
neg = 0
# make an integer out of the number
x = 0
for digit in str(number):
x = x * len(fromdigits) + fromdigits.index(digit)
# create the result in base 'len(todigits)'
if x == 0:
res = todigits[0]
else:
res = ""
while x > 0:
digit = x % len(todigits)
res = todigits[digit] + res
x = int(x / len(todigits))
if neg:
res = '-' + res
return res
def ascii_to_dna(string):
"""Translates ASCII code to DNA."""
converter = BaseConverter('ACGT')
dna = ""
for char in string:
decimal = ord(char)
dna_number = converter.from_decimal(decimal)
# 4 digit padding
dna_number = dna_number.rjust(4, 'A')
dna += dna_number
return dna
print ascii_to_dna("Hello World!")
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