在 DBF 中搜索并更新记录

Search in DBF and update record

代码:

#!/usr/bin/python
db = dbf.Dbf("MEST2.DBF")
#LINE TO UPDATE:
rec = db[0]
#PROEST IS A field of my dbf. I'm assigning 1 to this field line 0
rec["PROEST"] = 1
rec.store()
del rec
db.close()

DBF 图片TABLE:http://i.stack.imgur.com/1UHE1.jpg

我的问题是我无法按行更改记录,因为产品的位置 (PROCOD) 可能会有所不同。

有什么获取 PROCOD 和更改 PROEST 值的建议吗?

更新:

#!/usr/bin/python

import dbf
db = dbf.Table('MEST2.DBF')
with db:
    procod_idx = db.create_index(lambda rec: (rec.codigo, rec.procod))
    match = procod_idx.search(match='000001')

    # should only be one product with that code
    record = match[0]   
    with record:
        record.proest = 23

但现在的问题是,我如何根据 CODIGO 字段(股票代码)编辑值。我有多个股票 ID:(1、2、5、11)。代码只更新第一个结果,我需要更新基于 CODIGO FIELD 的特定记录。

在 SQL 中将是:"UPDATE PROEST SET 32 where CODIGO=11"... 或 CODIGO=2

已解决 作者:Ethan Furman

#!/usr/bin/python

import dbf
db = dbf.Table('MEST2.DBF')
with db:
    procod_idx = db.create_index(lambda rec: (rec.codigo, rec.procod))
    match = procod_idx.search(match=(11, '000001'))
    record = match[0]
    with record:
        record.proest = 25
        record.dt_atualiz = '14/07/15 16:52'

你没有说你使用的是哪个 dbf 包,但它看起来像 mine.

您要做的是在 PROCOD 字段上创建一个临时索引,然后您可以搜索它并更新您需要的任何其他字段:

# untested
import dbf
db = dbf.Table('MEST2.DBF')
with db:
    procod_idx = db.create_index(lambda rec: rec.procod)
    # get a list of all matching records
    match = procod_idx.search(match='000001')
    # should only be one product with that code
    record = match[0]
    with record:
        record.proest = ...
        record.dt_atualiz = ...

如果产品编码不唯一,则上面的"should only be one product with that code comment"是错误的

将索引更改为:

procod_idx = db.create_index(lambda rec: (rec.codigo, rec.procod))

然后搜索:

    match = procod_idx.search(match=(11, '000001'))
    record = match[0]
    ...
    match = procod_idx.search(match=(2, '000001'))
    record = match[0]
    ...