将Pandas DataFrame写入MySQL数据库

Question

I'm trying to write a pandas dataframe to MySQL database with following code.

import pandas as pd
import numpy as np
from pandas.io import sql
import MySQLdb

df = pd.DataFrame([[1.1, 1.1, 1.1, 2.6, 2.5, 3.4,2.6,2.6,3.4,3.4,2.6,1.1,1.1,3.3], list('AAABBBBABCBDDD'), [1.1, 1.7, 2.5, 2.6, 3.3, 3.8,4.0,4.2,4.3,4.5,4.6,4.7,4.7,4.8]]).T

db = MySQLdb.connect("192.168.56.101","nilani","123","test")
cursor = db.cursor()

cursor.execute("DROP TABLE IF EXISTS TEST")

sql = """CREATE TABLE TEST (
         ID  INT NOT NULL,
         COL1 CHAR(20),
         COL2 CHAR(20),  
         COL3 CHAR(20))"""

cursor.execute(sql)

sql.write_frame(df, con=db, name='TEST', flavor='mysql')

db.close()

I have been referring this question and the other resources. Any way I get following error. What will be the reason?

sql.write_frame(df, con=db, name='TEST', flavor='mysql')
AttributeError: 'str' object has no attribute 'write_frame'

Answer 1

You have overwritten the from pandas.io import sql with sql = """... , so sql is now a string and no longer a pandas module which holds the write_frame function.

---

EDIT: the AttributeError: 'numpy.int64' object has no attribute 'replace' error you get is due to the fact that you use integer column labels (this is a bug). Try setting the columns labels to something else, eg:

df.columns = ['COL1', 'COL2', 'COL3']