我正在使用pandas
库将excel存储到bytesIO
内存中。稍后,我将这个bytesIO
对象存储到SQL Server中,如下所示-
df = pandas.DataFrame(data1, columns=['col1', 'col2', 'col3'])
output = BytesIO()
writer = pandas.ExcelWriter(output,engine='xlsxwriter')
df.to_excel(writer)
writer.save()
output.seek(0)
workbook = output.read()
#store into table
Query = '''
INSERT INTO [TABLE]([file]) VALUES(?)
'''
values = (workbook)
cursor = conn.cursor()
cursor.execute(Query, values)
cursor.close()
conn.commit()
#Create excel file.
Query1 = "select [file] from [TABLE] where [id] = 1"
result = conn.cursor().execute(Query1).fetchall()
print(result[0])
现在,我想从表中拉回BytesIO对象,并创建一个excel文件并将其存储在本地。我该怎么办?
#Get Required data in DataFrame:
df = pandas.DataFrame(data1, columns=['col1', 'col2', 'col3'])
#Convert the data frame to Excel and store it in BytesIO object `workbook`:
output = BytesIO()
writer = pandas.ExcelWriter(output,engine='xlsxwriter')
df.to_excel(writer)
writer.save()
output.seek(0)
workbook = output.read()
#store into Database table
Query = '''
INSERT INTO [TABLE]([file]) VALUES(?)
'''
values = (workbook)
cursor = conn.cursor()
cursor.execute(Query, values)
cursor.close()
conn.commit()
#Retrieve the BytesIO object from Database
Query1 = "select [file] from [TABLE] where [id] = 1"
result = conn.cursor().execute(Query1).fetchall()
WriteObj = BytesIO()
WriteObj.write(result[0][0])
WriteObj.seek(0)
df = pandas.read_excel(WriteObj)
df.to_excel("outputFile.xlsx")