将字典中的值与列表进行比较(Python)

时间:2021-02-12 12:31:03

标签: python dictionary cs50

我正在处理这个 CS50 问题集,它告诉我们匹配人的 DNA

这是我几乎完成的代码:

import re, csv, sys

def main(argv):

    # Open csv file
    csv_file = open(sys.argv[1], 'r')
    people = csv.reader(csv_file)

    nucleotide = next(people)[1:]

    # Open dna sequences file
    txt_file = open(sys.argv[2], 'r')
    dna_file = txt_file.read()

    str_repeat = {}
    str_list = find_STRrepeats(str_repeat, nucleotide, dna_file)
    
    match_dna(people, str_list)


def find_STRrepeats(str_list, nucleotide, dna):
    for STR in nucleotide:
        groups = re.findall(rf'(?:{STR})+', dna)
        if len(groups) == 0:
            str_list[STR] = 0
        else:
            total = max(len(i)/len(STR) for i in groups)
            str_list[STR] = int(total)
        
    return str_list


def match_dna(people, str_list):
    for row in people:
        # Get people name in people csv
        person = row[0]
        # Get all dna value of each people
        data = row[1:]
        
        # If all value in dict equal with all value in data, print the person
        if str_list.values() == data:
           print(person)
           sys.exit(0)
    
    print("No match")

if __name__ == "__main__":
   main(sys.argv[1:])

所以,我一直坚持使用 match_dna 函数。我对如何比较字典中的值感到困惑:str_list 与列表中的值:people

str_list = {'AGATC': 4, 'AATG': 1, 'TATC': 5}

data = ['4', '1', '5']

我的代码有什么应该改变的吗?或者也许是一种比较这两种不同结构的简单方法?谢谢。

1 个答案:

答案 0 :(得分:0)

str_list = {'AGATC': 4, 'AATG': 1, 'TATC': 5}

data = ['4', '1', '5']

for data_item in data:

    for key,values in str_list.items():
    
        # list data '4','1','5' are in string 
        # and dictonery value 4,1,5 are in integer form
        # hence you need to compare the same data type 
    
        if values == int(data_item):
            print(key)

在您提供的第二个剪辑中。列表数据,即“data” '4','1','5' 在字符串和字典值中,即,“str_list” 4,1,5 是整数形式,因此您需要通过转换来比较相同的数据类型将数据列表为整数。你可以查看我上面的代码供你参考。