Question

到目前为止，这是我的代码： * rit_object是一个私有类，为每个参数分配类型

from rit_object import *

class YearCount(rit_object):
    __slots__ = ( 'year', 'count')
    _types = (int, int)

def createYearCount(year, count):
    return YearCount(year, count)

def readWordFile(fileName):
    #read in the entire unigram dataset
    for line in fileName:
        new = line.split(', ')
        print(new)
        #s = createYearCount(int(line[1]), line[2])
        #print(s)


def main():
    fileName = input('Enter filename: ')
    readWordFile(open(fileName))

main()

我必须在一个csv文件中读取，该文件代表该年中该单词，年份和该单词的出现次数：

airport, 2007, 175702
airport, 2008, 173294
request, 2005, 646179
request, 2006, 677820
request, 2007, 697645
request, 2008, 795265
wandered, 2005, 83769
wandered, 2006, 87688
wandered, 2007, 108634
wandered, 2008, 171015

我的readWordFile函数应该输入一个fileName并输出一个字典映射单词到YearCount对象的列表。输出应该如下：

{’airport’: [YearCount( year=2007, count=175702 ), YearCount( year=2008,
count=173294 )], ’wandered’: [YearCount( year=2005, count=83769 ),
YearCount( year=2006, count=87688 ), YearCount( year=2007, count=108634 ),
YearCount( year=2008, count=171015 )], ’request’: [YearCount( year=2005,
count=646179 ), YearCount( year=2006, count=677820 ), YearCount( year=2007,
count=697645 ), YearCount( year=2008, count=795265 )]}

我不确定如何使用字典映射。如何创建包含单词的字典作为键，值是包含年份和计数的YearCount对象。？

Answer 1

首先你应该有一个dict obj

result = {}

然后，在函数readWordFile

new = line.split(', ')
id = new[0]
yc = createYearCount(int(new[1]), new[2])
# add to list or create a new list
if (not result.has_key(id)):
        result[id] = [yc]
    else:
        result[id].append(yc)

将单词映射到对象列表的字典

1 个答案: