问题
I'm trying to import a pipe delimited text file into an access database with an existing table using a Python 3.4 application I'm working on, but I'm having some trouble.
The application will be used to import different text files so I'm using an entry widget to write in the filename and I want the contents of the file entered to be loaded into my table. I tried loading the file into the able just using access and it worked fine so the formatting should be good. Below is some of the code I've tried for my function to no avail.
def insert_data():
inputfile = filepath.get()
fobj = open(inputfile)
cur.execute("""SELECT * INTO text_file_data
FROM [odbc;Driver={Microsoft Text Driver (*.txt; *.csv)};Dbq='{fobj}';];)"""
.format(fobj=fobj))
conn.commit()
gives the following:
Exception in Tkinter callback Traceback (most recent call last): File "C:\Python34\lib\tkinter__init__.py", line 1487, in call return self.func(args) File "C:/Users/amarquart/PycharmProjects/Database Testing/Source/DBTesting.py", line 267, in run insert_data() File "C:/Users/amarquart/PycharmProjects/Database Testing/Source/DBTesting.py", line 25, in insert_data .format(fobj=fobj)) KeyError: 'Microsoft Text Driver ('
and
def insert_data():
inputfile = filepath.get()
fobj = open(inputfile)
cur.execute("""SELECT * INTO text_file_data
FROM [Text;HDR=Yes;FMT=Delimited;Database=C:\Users\amarquart\Documents\functionDB.mdb].;{fobj}')"""
.format(fobj=fobj))
conn.commit()
gives the following:
File "C:/Users/amarquart/PycharmProjects/Database Testing/Source/DBTesting.py", line 24 FROM [Text;HDR=Yes;FMT=Delimited;Database=C:\Users\amarquart\Documents\functionDB.mdb].;{fobj}')""" SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 93-94: truncated \UXXXXXXXX escape
other related info
database filepath: C:\Alex\functionDB.mdb
filepath being used with fobj variable: C:\Users\amarquart\Documents\5.txt
table name: text_file_data
using pyodbc for my connection
Any help would be much appreciated.
Thanks,
Alex
EDIT My text file has no headers, an example from it is posted below
D|1|502|2013|073306586|479.18
LATEST ATTEMPT:
def insert_data():
inputfile = filepath.get()
fobj = open(inputfile)
cur.execute("""INSERT INTO text_file_data (Letter, [Number], Batch, [Year], Parcel, Amount)
VALUES ([Text;FMT=Delimited(|);HDR=NO;DATABASE=C:\Alex\functionDB.mdb].
['{fobj}')]""").format(fobj=fobj)
conn.commit()
is giving me the following:
Exception in Tkinter callback Traceback (most recent call last): File "C:\Python34\lib\tkinter__init__.py", line 1487, in call return self.func(*args) File "C:/Users/amarquart/PycharmProjects/Database Testing/Source/DBTesting.py", line 269, in run insert_data() File "C:/Users/amarquart/PycharmProjects/Database Testing/Source/DBTesting.py", line 26, in insert_data ['{fobj}')]""").format(fobj=fobj) pyodbc.Error: ('21S01', '[21S01] [Microsoft][ODBC Microsoft Access Driver] Number of query values and destination fields are not the same. (-3520) (SQLExecDirectW)')
EDIT GOT IT
This is different from everything I found on the internet, but it works. It got all the data from the text file into the database, the data wasn't in the same order, but that really doesn't matter.
def insert_data():
inputfile = filepath.get()
fobj = open(inputfile)
for line in fobj:
column = line.split('|')
a = str(column[0])
b = int(column[1])
c = int(column[2])
d = str(column[3])
e = str(column[4])
f = Decimal(column[5])
cur.execute('''INSERT INTO text_file_data ([Letter], [Number], [Batch], [Year], [Parcel], [Amount])
VALUES ('{a}', '{b}', '{c}', '{d}', '{e}', '{f}')'''.format(a=a, b=b, c=c, d=d, e=e, f=f))
conn.commit()
EDIT, GOT IT AGAIN
def insert_data():
inputfile = filepath.get()
qry = """INSERT INTO text_file_data ([Letter], [Number], [Batch], [Year], [Parcel], [Amount])
VALUES (?,?,?,?,?,?)"""
with open(inputfile) as pipeFile:
for line in pipeFile:
cur.execute(qry, line.split("|"))
conn.commit()
this works too, and is possibly better?
Thanks for the help everyone!
回答1:
Working with Python 2.7 and pypyodbc, I got this to sort-of-work ...
# -*- coding: utf-8 -*-
import os
import pypyodbc
workingFolder = "C:\\Users\\Gord\\Desktop\\"
pipeFileName = "stuff.txt"
commaFileName = "stuff.csv"
with open (workingFolder + pipeFileName, "r") as pipeFile:
data = pipeFile.read()
with open (workingFolder + commaFileName, "w") as commaFile:
commaFile.write(data.replace("|",","))
connStr = (
r'DRIVER={Microsoft Access Driver (*.mdb, *.accdb)};' +
r'DBQ=C:\Users\Public\Database1.accdb'
)
db = pypyodbc.connect(connStr)
qry = """INSERT INTO text_file_data ([Letter], [Number], [Batch], [Year], [Parcel], [Amount])
SELECT F1, F2, F3, F4, F5, F6
FROM [Text;FMT=Delimited;HDR=NO;IMEX=2;CharacterSet=437;Database="""
qry += workingFolder + "].[" + commaFileName.replace(".","#") + "]"
crsr = db.cursor()
crsr.execute(qry)
db.commit()
db.close()
os.remove(workingFolder + commaFileName)
... but it stripped the leading zero from the [Parcel] field. This seemed to work better (not sure about speed, though):
# -*- coding: utf-8 -*-
import pypyodbc
connStr = (
r'DRIVER={Microsoft Access Driver (*.mdb, *.accdb)};' +
r'DBQ=C:\Users\Public\Database1.accdb'
)
db = pypyodbc.connect(connStr)
qry = """INSERT INTO text_file_data ([Letter], [Number], [Batch], [Year], [Parcel], [Amount])
VALUES (?,?,?,?,?,?)"""
crsr = db.cursor()
with open (r"C:\Users\Gord\Desktop\stuff.txt", "r") as pipeFile:
for line in pipeFile:
crsr.execute(qry, line.split("|"))
db.commit()
db.close()
回答2:
This is what did it for me
def insert_data():
inputfile = filepath.get()
qry = """INSERT INTO text_file_data ([Letter], [Number], [Batch], [Year], [Parcel],
[Amount])
VALUES (?,?,?,?,?,?)"""
with open(inputfile) as pipeFile:
for line in pipeFile:
cur.execute(qry, line.split("|"))
conn.commit()
Thanks everyone!
来源：https://stackoverflow.com/questions/25510786/import-text-file-to-access-2003-database-using-python