Simple scoring routine for ascii text. Uses Moby Dick as a source for ascii frequencies (only chars 32-127).

ascii_score.py

ASCII_FREQS = [
     162.7,   1.5,   2.6,   0.0,   0.0,   0.0,   0.0,   2.4, 
       0.2,   0.2,   0.1,   0.0,  16.0,   5.0,   6.5,   0.0, 
       0.1,   0.2,   0.1,   0.0,   0.0,   0.1,   0.0,   0.1, 
       0.1,   0.0,   0.2,   3.4,   0.0,   0.0,   0.0,   0.8, 
       0.0,   2.2,   1.2,   1.0,   0.7,   1.1,   0.7,   0.6, 
       1.2,   3.0,   0.2,   0.2,   0.8,   0.6,   1.0,   0.9, 
       1.0,   0.3,   0.7,   1.9,   2.1,   0.2,   0.1,   1.1, 
       0.0,   0.3,   0.0,   0.0,   0.0,   0.0,   0.0,   0.0, 
       0.0,  62.8,  12.9,  18.1,  31.3,  97.0,  16.8,  16.9, 
      51.1,  51.9,   0.8,   6.6,  34.9,  18.9,  53.9,  57.4, 
      13.6,   1.0,  43.2,  51.7,  71.7,  22.2,   7.0,  17.5, 
       0.9,  13.9,   0.5,   0.0,   0.0,   0.0,   0.0 
]

def score(s):
    score = 0
    for ch in s:
        if ord(ch) > 31 and ord(ch) < 127:
            score += ASCII_FREQS[ord(ch)-32]/100

    return score