如何使用python 3.5將mysql數據導入到.txt文件？

我想將mysql數據導入使用python 3.x的.txt文件，但它看起來像我缺少的東西。期望是，數據應導入到表格/列格式的文件。我盡我最大努力獲得解決方案，但我沒有得到我所需要的。如何使用python 3.5將mysql數據導入到.txt文件？

下面是我的代碼：

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()

在終端蟒蛇顯示我的數據時執行print(result)但在db-data.txt文件，它只顯示列名。

預期結果：

Column_Name1 Column_Name2 Column_Name3 
data1  data2  data3 
data1  data2  data3

來源

2017-04-26 Sohil Shivani

'writelines（）'假定存在一個線的陣列，則必須使用'write（row +「\ n」）' –

請參閱http://stackoverflow.com/questions/12377473/python-write-versus-writelines-and-concatenated-strings使用write而不是writelines。 –

我剛剛通過使用下面的代碼得到了表結構：'用於結果中的行： newfile.write（「\ t」.join（row））''但沒有來自sql的數據。 –

該代碼可用於上述問題的產生預期的輸出是如下：

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()

來源

2017-04-26 14:39:31

如何使用python 3.5將mysql數據導入到.txt文件？

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