Python 为来自两个不同文件的字典赋值

我有一个像这样的

bam.txt

文件：

exomesinglesample_out/bam/pfg001G.GRCh38DH.target.bam
exomesinglesample_out/bam/pfg002G.GRCh38DH.target.bam
exomesinglesample_out/bam/pfg014G.GRCh38DH.target.bam

另一个文件

bai.txt

：

exomesinglesample_out/bam/pfg001G.GRCh38DH.target.bai
exomesinglesample_out/bam/pfg002G.GRCh38DH.target.bai
exomesinglesample_out/bam/pfg014G.GRCh38DH.target.bai

我想创建一个字典列表，其键始终如下所示：

keys = ['bam','bam_index']
d = dict.fromkeys(keys)
l = [d for x in range(3)]
print(l)

[{'bam': None, 'bam_index': None}, {'bam': None, 'bam_index': None}, {'bam': None, 'bam_index': None}]

[{'bam': 'exomesinglesample_out/bam/pfg001G.GRCh38DH.target.bam', 'bam_index': 'exomesinglesample_out/bam/pfg001G.GRCh38DH.target.bai'}, {'bam': 'exomesinglesample_out/bam/pfg002G.GRCh38DH.target.bam', 'bam_index': 'exomesinglesample_out/bam/pfg002G.GRCh38DH.target.bai'}, {'bam': 'exomesinglesample_out/bam/pfg014G.GRCh38DH.target.bam', 'bam_index': 'exomesinglesample_out/bam/pfg014G.GRCh38DH.target.bai'}]

[{'bam': 'exomesinglesample_out/bam/pfg001G.GRCh38DH.target.bam', 'bam_index': 'exomesinglesample_out/bam/pfg001G.GRCh38DH.target.bai'}, {'bam': 'exomesinglesample_out/bam/pfg002G.GRCh38DH.target.bam', 'bam_index': 'exomesinglesample_out/bam/pfg002G.GRCh38DH.target.bai'}, {'bam': 'exomesinglesample_out/bam/pfg014G.GRCh38DH.target.bam', 'bam_index': 'exomesinglesample_out/bam/pfg014G.GRCh38DH.target.bai'}]

字典应该是这样的，而不是具有

None

的值：

keys = ['bam','bam_index']
d = dict.fromkeys(keys)
l = [d for x in range(3)]
print(l)

[{'bam': None, 'bam_index': None}, {'bam': None, 'bam_index': None}, {'bam': None, 'bam_index': None}]

[{'bam': 'exomesinglesample_out/bam/pfg001G.GRCh38DH.target.bam', 'bam_index': 'exomesinglesample_out/bam/pfg001G.GRCh38DH.target.bai'}, {'bam': 'exomesinglesample_out/bam/pfg002G.GRCh38DH.target.bam', 'bam_index': 'exomesinglesample_out/bam/pfg002G.GRCh38DH.target.bai'}, {'bam': 'exomesinglesample_out/bam/pfg014G.GRCh38DH.target.bam', 'bam_index': 'exomesinglesample_out/bam/pfg014G.GRCh38DH.target.bai'}]

[{'bam': 'exomesinglesample_out/bam/pfg001G.GRCh38DH.target.bam', 'bam_index': 'exomesinglesample_out/bam/pfg001G.GRCh38DH.target.bai'}, {'bam': 'exomesinglesample_out/bam/pfg002G.GRCh38DH.target.bam', 'bam_index': 'exomesinglesample_out/bam/pfg002G.GRCh38DH.target.bai'}, {'bam': 'exomesinglesample_out/bam/pfg014G.GRCh38DH.target.bam', 'bam_index': 'exomesinglesample_out/bam/pfg014G.GRCh38DH.target.bai'}]

换句话说，词典列表中第一个词典的第一个值必须有

bam.txt

的第一行，列表中第一个词典的第二个值必须有

bai.txt

的第一行，一直到两个文件中最后一行的末尾

---

我知道

dict

值不能被索引，因为在python中字典是无序的数据类型，所以可能需要使用

元组
生成器
或
列表
来解决这个问题，您可以使用
zip（）
逐行遍历这两个文件，并按照以下方式准备字典：

keys = ['bam','bam_index']
l = []
with open('bam.txt', 'r') as f1, open('bai.txt', 'r') as f2:
    for lf1, lf2 in zip(f1, f2):
        d = {keys[0] : lf1.strip(), keys[1] : lf2.strip()}
        l.append(d)
print(l)

输出：