Question

我使用python3.4从mysql数据库表中提取。我使用csv模块将数据库中的数据行写入.CSV格式。现在我正在努力找出如何通过关键字来检查数据行，这些关键字可能会显示在第四列数据中（第[3]行）。我正在考虑使用re module如下，但我一直在收到错误。是否无法在字符串类型的字段中搜索关键字，并在具有这些关键字的情况下过滤这些结果？我一直在收到错误。请帮忙

import re
import csv

userdate = input('What date do you want to look at?')

query = ("SELECT *FROM sometable WHERE timestamp LIKE %s", userdate)

keywords = 'apples', 'bananas', 'cocoa'



# Execute sql Query
cursor.execute(query)
result = cursor.fetchall()

#Reads a CSV file and return it as a list of rows
def read_csv_file(filename):
    """Reads a CSV file and return it as a list of rows."""

    for row in csv.reader(open(filename)):
        data.append(row)
    return data
f = open(path_in + data_file)
read_it = read_csv_file(path_in + data_file)

with open('file.csv', 'wb') as csvfile:
   spamwriter = csv.writer(csvfile, delimiter=' ',
                            quotechar='|', quoting=csv.QUOTE_MINIMAL)

for row in data:
   match = re.search('keywords, read_it)
   if match:       
        spamwriter.writerow(row)

Answer 1

我放弃了正则表达式并使用了

for row in data:
    found_it = row.find(keywords)
    if found_it != -1:
         spamwriter.writerow(row)

使用python从mysql的字符串中搜索关键字？

1 个答案: