删除不等于n部分的块

Question

我想把这个序列分成一个 n=3 的列表。codons('agucaccgucautc')# result = ['agu','cac','cgu','cau']# 'tc' is supposed to be ignored as it doesn't equal to n=3我尝试过以下解决方案；def codons(RNA):     """This functions returns a list of codons present in an RNA sequence"""    # store the length of string    length = len(RNA)    #divide the string in n equal parts    n = 3    temp = 0    chars = int(len(RNA)/3)    #stores the array of string    change = []    #check whether a string can be divided into n equal parts    for i in range(0, length, chars):        part = [RNA[i:i+3] for i in range(0, length, n)];        change.append(part);        return part        if (length % n != 0):            continue但是当我尝试再次运行之前的代码时，它仍然返回“tc”codons('agucaccgucautc')# result = ['agu', 'cac', 'cgu', 'cau', 'tc']谁能帮我做什么来忽略任何不等于 n=3 或最后一部分“tc”的字符？

Answer 1

您可以按以下方式使用列表理解：

s = 'agucaccgucautc'

n = 3

out = [(s[i:i+n]) for i in range(0, len(s), n) if len(s[i:i+n])%n == 0]