使用 Python 拉取 MySQL 日期范围：类型错误：不可哈希类型：'bytearray'

Question

我正试图弄清楚如何从一个表中提取数据，该表有一个名为"sent_time"的列，并且日期时间介于两个日期时间之间。我终于能够弄清楚如何使用dateutil解析器来输入日期范围拉取的两个日期。我现在的问题是我得到了这个错误：

Traceback (most recent call last):
  File "C:Python34timerange.py", line 75, in <module>
    worksheet.write(r,0,row[0])
  File "C:Python34libsite-packagesxlsxwriterworksheet.py", line 64, in cell_wrapper
    return method(self, *args, **kwargs)
  File "C:Python34libsite-packagesxlsxwriterworksheet.py", line 436, in write
    return self.write_string(row, col, *args)
  File "C:Python34libsite-packagesxlsxwriterworksheet.py", line 64, in cell_wrapper
    return method(self, *args, **kwargs)
  File "C:Python34libsite-packagesxlsxwriterworksheet.py", line 470, in write_string
    string_index = self.str_table._get_shared_string_index(string)
  File "C:Python34libsite-packagesxlsxwritersharedstrings.py", line 128, in _get_shared_string_index
    if string not in self.string_table:
TypeError: unhashable type: 'bytearray'

让我困惑的是字节数组。你们能告诉我我做错了什么，我该怎么解决吗？

---

我想给你我所拥有的所有其他文件的所有信息，以及我正在拍摄的内容，看看你是否可以复制并真正使其工作，看看它是否不仅仅是我的系统或我的一些配置。。

我有一个只有一张表的数据库。让我们称之为"table1"该表由以下列分解：

sent_time|delivery_time|id1_active|id2_active|id3_active|id1_inactive|id2_inactive|id3_inactive|location_active|location_inactive`更多

假设这是两个或两个以上的客户相互运送货物。每个客户都有三个id。

我创建了一个"config.ini"文件，让我的生活更轻松

[mysql]
host = localhost
database = db_name
user = root
password = blahblah

我创建了一个"python_mysql_dbconfig.py"

from configparser import ConfigParser
def read_db_config(filename=’config.ini’, section=’mysql’):
“”” Read database configuration file and return a dictionary object
:param filename: name of the configuration file
:param section: section of database configuration
:return: a dictionary of database parameters
“””
# create parser and read ini configuration file
parser = ConfigParser()
parser.read(filename)
# get section, default to mysql
db = {}
if parser.has_section(section):
items = parser.items(section)
for item in items:
db[item[0]] = item[1]
else:
raise Exception(‘{0} not found in the {1} file’.format(section, filename))
return db

---

这是我现在正在处理的代码。。。你能看看吗？

# Establish a MySQL connection
from mysql.connector import MySQLConnection, Error
from python_mysql_dbconfig import read_db_config
db_config = read_db_config()
conn = MySQLConnection(**db_config)
cursor = conn.cursor(raw=True)
#to export to excel
import xlsxwriter
from xlsxwriter.workbook import Workbook
#to get the csv converter functions
import os
import subprocess
import glob
#to get the datetime functions
import datetime
from datetime import datetime
import dateutil.parser
#creates the path needed for output files
path = 'C:/Python34/output_files/'
#creates the workbook
output_filename = input('output filename:')
workbook = xlsxwriter.Workbook(path + output_filename + '.xlsx')
worksheet = workbook.add_worksheet()
#formatting definitions
bold    = workbook.add_format({'bold': True})
date_format = workbook.add_format({'num_format': 'yyyy-mm-dd hh:mm:ss'})
timeShape =  '%Y-%m-%d %H:%M:%S'
#actual query

query = (
    "SELECT sent_time, delivered_time, OBJ, id1_active, id2_active, id3_active, id1_inactive, id2_inactive, id3_inactive, location_active, location_inactive FROM table1 "
    "WHERE sent_time BETWEEN %s AND %s"
)
userIn = dateutil.parser.parse(input('start date:'))
userEnd = dateutil.parser.parse(input('end date:'))

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

#sets up the header row
worksheet.write('A1','sent_time',bold)
worksheet.write('B1', 'delivered_time',bold)
worksheet.write('C1', 'customer_name',bold)
worksheet.write('D1', 'id1_active',bold)
worksheet.write('E1', 'id2_active',bold)
worksheet.write('F1', 'id3_active',bold)
worksheet.write('G1', 'id1_inactive',bold)
worksheet.write('H1', 'id2_inactive',bold)
worksheet.write('I1', 'id3_inactive',bold)
worksheet.write('J1', 'location_active',bold)
worksheet.write('K1', 'location_inactive',bold)
worksheet.autofilter('A1:K1')  #dropdown menu created for filtering

#print into client to see that you have results
print("     sent_time     ", "        delivered_time     ", "OBJ", "t   id1_active  ", "   id2_active  ", "    id3_active  ", "t", " id1_inactive ", " id2_inactive ", "  id3_inactive ", "tlocation_active", "tlocation_inactive")
for row in result:
    print(*row, sep='t')

# Create a For loop to iterate through each row in the XLS file, starting at row 2 to skip the headers
for r, row in enumerate(result, start=1):  #where you want to start printing results inside workbook
    for c, col in enumerate(row):
        worksheet.write_datetime(r,0,row[0], date_format)
        worksheet.write_datetime(r,1, row[1], date_format)
        worksheet.write(r,2, row[2])
        worksheet.write(r,3, row[3])
        worksheet.write(r,4, row[4])
        worksheet.write(r,5, row[5])
        worksheet.write(r,6, row[6])
        worksheet.write(r,7, row[7])
        worksheet.write(r,8, row[8])
        worksheet.write(r,9, row[9])
        worksheet.write(r,10, row[10])


#close out everything and save
cursor.close()
workbook.close()
conn.close()
#print number of rows and bye-bye message
print ("- - - - - - - - - - - - -")
rows = len(result)
print ("I just imported "+ str(rows) + " rows from MySQL!")
print ("")
print ("Good to Go!!!")
print ("")

#CONVERTS JUST CREATED FILE TO CSV
# set path to folder containing xlsx files
out_path ='C:/Python34/csv_files'
os.chdir(path)

# find the file with extension .xlsx
xlsx = glob.glob(output_filename + '.xlsx')
# create output filenames with extension .csv
csvs = [x.replace('.xlsx','.csv') for x in xlsx]
# zip into a list of tuples
in_out = zip(xlsx,csvs)
# loop through each file, calling the in2csv utility from subprocess
for xl,csv in in_out:
   out = open(csv,'w')
   command = 'c:/python34/scripts/in2csv %s\%s' % (path,xl)
   proc = subprocess.Popen(command,stdout=out)
   proc.wait()
   out.close()
print('XLSX and CSV files named ' + output_filename + ' were created')

Answer 1

您已经在cursor = conn.cursor(raw=True)中禁用了类型转换。删除raw=True，使驱动程序停止为所有类型提供直接的字节数组。