你如何从CSV中创建字典密钥?
我在使用csvreader创建字典密钥时遇到了问题。 我想创建一个字典,其中包含找到数据的位置列,以便稍后将它写出到新的位置。 我没有包含写函数,因为我想了解如何首先创建密钥。
例如,该数据点123-123-1234在行[0]中找到。
input_file_column_modification = ''
myData = []
primary_key_list = {}
if os.path.isfile(filename):
input_file_column_modification = open(filename)
myData = [item for item in csv.reader(input_file_column_modification)]
for row in myData:
primary_key_pattern_match = re.search('d{3}-d{3}-d{4}, row[0], re.I)
if primary_key_pattern_match is not None:
** QUESTION: How do I keep track of the row/columns were the data is being found?
primary_key_list.append(primary_key_pattern_match.group(0))
正在读入的当前输入请注意,2个条目没有匹配的模式。
信息,地址,城市,ZipCode,最后更新
Lorem ipsum dolor sit amet,consectetur(123-123-1234)adipiscing elita,100 some address,cityname,“zipcode”,03/24/2016
Lorem ipsum dolor sit amet,consectetur adipiscing elit,200 some address,cityname,zipcode,03/24/2016
Lorem ipsum dolor sit amet,consectetur(345-345-3456)adipiscing elit,300 some address,cityname,zipcode,03/24/2016
Lorem ipsum dolor sit amet,consectetur adipiscing elit,400 some address,cityname,zipcode,03/24/2016
Lorem ipsum dolor sit amet,consectetur(567-567-5678)adipiscing elit,500 some address,cityname,zipcode,03/24/2016
这样做的一种方式是通过enumerate
,它可以为循环访问索引或“迭代计数器”和迭代的值:
for row_num, row in enumerate(myData):
primary_key_pattern_match = re.search('d{3}-d{3}-d{4}, row[0]', re.I)
if primary_key_pattern_match is not None:
row_num_and_row_data = (row_num, row)
# You now have a tuple whose 1st element is the row number
# and whose 2nd element is the row (a tuple or list).
# You can also skip making a tuple and add the row
# to a dictionary immediately (declare it before the loop):
row_dict[row_num] = row
# or to add the results of the regex:
row_dict[row_num] = primary_key_pattern_match.group(0)
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