somebody oneday

Transcribing DNA into RNA第二题也很简单，不过python还是有很多细节要注意。比如string 是不可变数据类型，可见转载17个新手常见Python运行时错误file=open('rosalind_rna.txt','r');seq=file.read();leng=len(seq);for i in range(0,leng): if se

ProblemIn DNA strings, symbols 'A' and 'T' are complements of each other, as are 'C' and 'G'.The reverse complement of a DNA string  is the string  formed by reversing the symbols of ,

第一题很简单，但是没怎么用过python，一道题中还是学到很多。counting DNA nucleotidedna=open('rosalind_dna.txt','r');这只是一个句柄而已，需要read（）或者 readline() 读入文件内容。len(seq)定义dict 还好只有4个碱基，但是以后肯定会需要更方便的定义。d={'A':0,'C':0,'G':0,'T'

ProblemThe GC-content of a DNA string is given by the percentage of symbols in the string that are 'C' or 'G'. For example, the GC-content of "AGCTATAG" is 37.5%. Note that the reverse complem

ProblemA sequence is an ordered collection of objects (usually numbers), which are allowed to repeat. Sequences can be finite or infinite. Two examples are the finite sequence (π,−2√,0,π) and

ProblemFigure 2. The Hamming distance between these two strings is 7. Mismatched symbols are colored red.Given two strings  and  of equal length, the Hamming distance between  and ,