9.1代码
genome_text = 'TTATGTTTTAAGGATGGGGCGTTAGTT'def div_word(word_to_judge):len_num = len(word_to_judge)save_word = ""if len_num % 3 == 0:print("This word is valid")if save_word.find("ATG") == "ATG":for i in range(1,len_num):save_word = word_to_judge[0 + i:i + 3]print(save_word)else:print("This word is invalid")div_word(genome_text)代码结果
我没用find这个命令.我想用for循环不断循环一个个遍历这些字符.
有的时候有结果,有的时候只能沉淀
.9.2
今天研究了一个对文本进行分割的函数
def div_text(start_num, end_num, text_word):text_i_save = ""for i_t in range(start_num, end_num):text_i_save += text_word[i_t]print(text_i_save)div_text(0, 3, genome_text)
div_text(4, 7, genome_text)
div_text(8,11, genome_text)
# 这个序列不对.应该遵循的是另一个模式
div_text(0, 3, genome_text)
div_text(4, 7, genome_text)
div_text(8,11, genome_text)div_text(0, 3, genome_text)
div_text(2, 5, genome_text)
div_text(4, 7, genome_text)
div_text(6, 9, genome_text)
div_text(8, 11, genome_text)
div_text(10, 13, genome_text)
起始到结束间隔3, 两行之前的起始和截止都间隔2.这样的就可以遍历整个字符串
大家看当起始从-2+i的时候结果
for i in range(0, len_num, 2):div_text(-2 + i, 1 + i, genome_text)
多出了TTT
那我就删除呗,好见证奇怪的时候来了
for i in range(0, len_num, 2):div_text(0 + i, 1 + i, genome_text)
我们来进行打印分析
for i in range(0, len_num, 2):div_text(0 + i, 1 + i, genome_text)print("0+i", 0 + i, "1+i", 1 + i)
又换成了-2
我发现我画蛇添足了.起始位置,直接用i就完事了,成功了.
但是新的问题开始
在函数div_text里
text_i_save += text_word[i_t]
它没事呀.怎么一放到循环里变成了这个怪样子.???
for i in range(0, len_num, 2):if i+2 < len_num:div_text(i, i + 3, genome_text)
def cut_word_start(judge_word,text_word):len_num = len(text_word)for i in range(0, len_num, 2):if i + 2 < len_num:if div_text(i, i + 3, text_word) == judge_word:print(text_word[i + 3:])
genome_text = 'TTATGTTTTAAGGATGGGGCGTTAGTT'
len_num_out = len(genome_text)def div_text(start_num, end_num, text_word):text_i_save = ""for i_t in range(start_num, end_num):text_i_save += text_word[i_t]return text_i_savedef cut_word_start(judge_word, text_word):len_num = len(text_word)for i in range(0, len_num, 2):if i + 2 < len_num:if div_text(i, i + 3, text_word) == judge_word:return text_word[i + 3:]def cut_word_end(judge_word, text_word):len_num = len(text_word)for i in range(0, len_num, 2):if i + 2 < len_num:if div_text(i, i + 3, text_word) == judge_word:print(text_word[:i+3])# print(i)else:print('a',i)def main():a = cut_word_start("ATG", genome_text)# print(a)cut_word_end("TAA", a)main()
