例2.2 统计文本文件里字符串的字符a、c、g、t出现的频数

例2.2 统计文本文件里字符串的字符a、c、g、t出现的频数

import numpy as np
a=[]
with open('data2_2.txt')as f:
    for (i,s)in enumerate(f):
        a.append([s.count('a'),s.count('c'),
                  s.count('g'),s.count('t')])
b=np.array(a);print(b)

print("学号：3004")

其中 data2_2.txt 内容如下：

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1.aggcacggaaaaacgggaataacggaggaggacttggcacggcattacacggagg
2.cggaggacaaacgggatggcggtattggaggtggcggactgttcgggga
3.gggacggatacggattctggccacggacggaaaggaggacacggcggacataca
4.atggataacggaaacaaaccagacaaacttcggtagaaatacagaagctta
5.cggctggcggacaacggactggcggattccaaaaacggaggaggcggacggaggc