Question

我正在尝试使用此csv文件并将其解析并以字典形式存储（对不起，如果我使用的术语不正确，我正在学习）。第一个元素是我的键，其余的是嵌套数组形式的值。

targets_value,11.4,10.5,10,10.8,8.3,10.1,10.7,13.1
targets,Cbf1,Sfp1,Ino2,Opi1,Cst6,Stp1,Met31,Ino4
one,"9.6,6.3,7.9,11.4,5.5",N,"8.4,8.1,8.1,8.4,5.9,5.9",5.4,5.1,"8.1,8.3",N,N
two,"7.0,11.4,7.0","4.8,5.3,7.0,8.1,9.0,6.1,4.6,5.0,4.6","6.3,5.9,5.9",N,"4.3,4.8",N,N,N
three,"6.0,9.7,11.4,6.8",N,"11.8,6.3,5.9,5.9,9.5","5.4,8.4","5.1,5.1,4.3,4.8,5.1",N,N,11.8
four,"9.7,11.4,11.4,11.4",4.6,"6.2,7.9,5.9,5.9,6.3","5.6,5.5","4.8,4.8,8.3,5.1,4.3",N,7.9,N
five,7.9,N,"8.1,8.4",N,"4.3,8.3,4.3,4.3",N,N,N
six,"5.7,11.4,9.7,5.5,9.7,9.7","4.4,7.0,7.7,7.5,6.9,4.9,4.6,4.9,4.6","7.9,5.9,5.9,5.9,5.9,6.3",6.7,"5.1,4.8",N,7.9,N
seven,"6.3,11.4","5.2,4.7","6.3,6.0",N,"8.3,4.3,4.8,4.3,5.1","9.8,9.5",N,8.4
eight,"11.4,11.4,5.9","4.4,6.3,6.0,5.6,7.6,7.1,5.1,5.3,5.1,4.9","6.3,6.3,5.9,5.9,6.6,6.6","5.3,5.2,7.0","8.3,4.3,4.3,4.8,4.3,4.3,8.3,4.8,8.3,5.1","9.2,7.4","9.4,9.3,7.9",N
nine,"9.7,9.7,11.4,9.7","5.2,4.6,5.5,6.5,4.5,4.6,5.5","6.3,5.9,5.9,9.5,6.5",N,"4.3,5.1,8.3,8.3,4.3,4.3,4.3,4.8",8.0,8.6,N
ten,"9.7,9.7,9.7,11.4,7.9","5.2,4.6,5.5,6.5,4.5,4.6,5.5","6.3,5.9,5.9,9.5,6.5",5.7,"4.3,4.3,4.3,5.1,8.3,8.3,4.3,4.3,4.3,4.8",8.0,8.6,N
YPL250C_Icy2,"11.4,6.1,11.4",N,"6.3,6.0,6.6,7.0,10.0,6.5,9.5,7.0,10.0",7.1,"4.3,4.3",9.2,"10.7,9.5",N
,,,,,,,,
,,,,,,,,

问题在于，在每一行中，由于每个单元格有多个值，因此某些列是引号，而有些列只有一个条目但没有引号。并且没有输入值的单元格插入了N.由于引号和非引号，数字和非数字的混合。

希望输出看起来像这样：

{'eight': ['11.4,11.4,5.9', '4.4,6.3,6.0,5.6,7.6,7.1,5.1,5.3,5.1,4.9', '6.3,6.3,5.9,5.9,6.6,6.6', '5.3,5.2,7.0', '8.3,4.3,4.3,4.8,4.3,4.3,8.3,4.8,8.3,5.1', '9.2,7.4', '9.4,9.3,7.9', 'N'], 

'ten': ['9.7,9.7,9.7,11.4,7.9', '5.2,4.6,5.5,6.5,4.5,4.6,5.5', '6.3,5.9,5.9,9.5,6.5', '5.7', '4.3,4.3,4.3,5.1,8.3,8.3,4.3,4.3,4.3,4.8', '8.0', '8.6', 'N'], 

'nine': ['9.7,9.7,11.4,9.7', '5.2,4.6,5.5,6.5,4.5,4.6,5.5', '6.3,5.9,5.9,9.5,6.5', 'N', '4.3,5.1,8.3,8.3,4.3,4.3,4.3,4.8', '8.0', '8.6', 'N']
}

我写了一个脚本来清理它并存储它，但不确定我的脚本是否已经过长时间没有任何理由＆＃34;。有什么提示吗？

motif_dict = {}
with open(filename, "r") as file:
    data = file.readlines()
    for line in data:
        if ',,,,,,,,' in line:
            continue
        else:
            quoted_holder = re.findall(r'"(\d.*?\d)"' , line)
            #reverses the order of the elements contained in the array
            quoted_holder = quoted_holder[::-1]
            new_line = re.sub(r'"\d.*?\d"', 'h', line).split(',')
            for position,element in enumerate(new_line):
                if element == 'h':
                    new_line[position] = quoted_holder.pop()
        motif_dict[new_line[0]] = new_line[1:]

Answer 1

有一个csv模块，可以更轻松地处理csv文件。在您的情况下，您的代码变为

import csv

with open("motif.csv","r",newline="") as fp:
    reader = csv.reader(fp)
    data = {row[0]: row[1:] for row in reader if row and row[0]}

其中if row and row[0]允许我们跳过空或第一个空元素的行。这会产生（添加换行符）

>>> data["eight"]
['11.4,11.4,5.9', '4.4,6.3,6.0,5.6,7.6,7.1,5.1,5.3,5.1,4.9', 
 '6.3,6.3,5.9,5.9,6.6,6.6', '5.3,5.2,7.0',
 '8.3,4.3,4.3,4.8,4.3,4.3,8.3,4.8,8.3,5.1', 
 '9.2,7.4', '9.4,9.3,7.9', 'N']
>>> data["ten"]
['9.7,9.7,9.7,11.4,7.9', '5.2,4.6,5.5,6.5,4.5,4.6,5.5',
 '6.3,5.9,5.9,9.5,6.5', '5.7', '4.3,4.3,4.3,5.1,8.3,8.3,4.3,4.3,4.3,4.8', 
 '8.0', '8.6', 'N']

在实践中，对于处理，我认为你想要将'N'替换为None或其他一些对象作为缺失标记，并使每个值都成为浮点数列表（即使它只有一个元素），但是随你（由你决定。

通过CSV文件进行调整以存储为具有嵌套数组值的字典。最好的方法？

1 个答案: