我试图导入mysql数据到一个. txt文件使用python 3. x，但它看起来像我错过了什么。期望数据应该以表格/列格式导入到文件中。我尽了最大努力得到解决方案，但我没有得到我需要的。
下面是我的代码：
import pymysql.cursors
import pymysql
import sys
import os
# Connect to the database
connection = pymysql.connect(host='localhost',
user='root',
password="",
db='jmeterdb',
cursorclass=pymysql.cursors.DictCursor)
try:
with connection.cursor() as cursor:
# Select all records
sql = "select * from emp"
cursor.execute(sql)
# connection is not autocommit by default. So you must commit to save
# your changes.
result = cursor.fetchall()
newfile = open("db-data.txt","a+")
for row in result:
newfile.writelines(row)
print(result)
newfile.close()
finally:
connection.close()
在终端上，python在执行print（result）时向我显示数据，但在db数据中。txt文件，仅显示列名。
预期结果：
Column_Name1 Column_Name2 Column_Name3
data1 data2 data3
data1 data2 data3
此代码为上述问题生成预期输出，如下所示：
import pymysql.cursors
import pymysql
import sys
import os
# Open database connection
connection = pymysql.connect(host='localhost',
user='root',
password="",
db='jmeterdb',
cursorclass=pymysql.cursors.DictCursor)
# prepare a cursor object using cursor() method
with connection.cursor() as cursor:
# Prepare SQL query to select a record into the database.
try:
sql = "SELECT * FROM EMP order by ename asc"
# Execute the SQL command
cursor.execute(sql)
# Fetch all the rows in a list of lists.
results = cursor.fetchall()
# print(results)
if results:
newfile = open("db-data.txt","a+")
newfile.write('ename'+"\t"+'jobs'+"\t"+"salary"+"\t"+'comm'+"\t"+'manager'+"\t"+'hiredate'+"\t"+'deptno'+"\t"+'empno'+"\n")
for index in results:
ltr=[]
ltr.append(index['ename'])
ltr.append(index['job'])
ltr.append(index['sal'])
ltr.append(index['comm'])
ltr.append(index['mgr'])
ltr.append(index['hiredate'])
ltr.append(index['deptno'])
ltr.append(index['empno'])
lenltr=len(ltr)
for i in range(lenltr):
newfile.write('{}'.format(ltr[i]))
newfile.write("\t")
print(ltr[i])
newfile.write("\n")
# # Now print fetched result
#print("ename=%s,empno=%d,job=%d,hiredate=%d,comm=%s,sal=%d,deptno=%d,mgr=%d" %(ename, empno, job, hiredate, comm, sal, deptno, mgr))
# print(index)
except:
print ("Error: unable to fecth data")
# disconnect from server
connection.close()
newfile.close()
