:>"^° ã@sTdZddlmZdZdZGdd„deƒZdd„Zd d „Zd S) aÕA class to handle frequency tables or letter count files. Example files for a DNA alphabet: A count file (whitespace separated):: A 50 C 37 G 23 T 58 The same info as a frequency file:: A 0.2976 C 0.2202 G 0.1369 T 0.3452 Functions: :read_count(f): read a count file from stream f. Then convert to frequencies. :read_freq(f): read a frequency data file from stream f. Of course, we then don't have the counts, but it is usually the letter frequencies which are interesting. Methods: (all internal) Attributes: :alphabet: The IUPAC alphabet set (or any other) whose letters you are using. Common sets are: ``IUPAC.protein`` (20-letter protein), ``IUPAC.unambiguous_dna`` (4-letter DNA). See ``Bio.Alphabet`` for more. :data: Frequency dictionary. :count: Count dictionary. Empty if no counts are provided. Example of use: >>> import io >>> from Bio.SubsMat import FreqTable >>> f_count = io.StringIO(u"A 50\nC 37\nG 23\nT 58") >>> ftab = FreqTable.read_count(f_count) >>> for nb in sorted(ftab): ... print("%s %0.4f" %(nb, ftab[nb])) ... A 0.2976 C 0.2202 G 0.1369 T 0.3452 é)ÚAlphabetééc@s=eZdZdZdd„Zdd„Zddd„ZdS) Ú FreqTablez>Define class to handle frequency tables or letter count files.cCsMtt|jjƒƒƒ}x+|jjƒD]\}}||||5s