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formato_csv.py
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formato_csv.py
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#!/usr/bin/python
# -*- coding: latin-1 -*-
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 3, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
"Módulo para manejo de archivos CSV (planillas de cálculo)"
__author__ = "Mariano Reingart (reingart@gmail.com)"
__copyright__ = "Copyright (C) 2010 Mariano Reingart"
__license__ = "GPL 3.0"
import csv
from decimal import Decimal
def leer(fn="entrada.csv", delimiter=";"):
"Analiza un archivo CSV y devuelve un diccionario (aplanado)"
items = []
csvfile = open(fn, "rb")
# deducir dialecto y delimitador
try:
dialect = csv.Sniffer().sniff(csvfile.read(256), delimiters=[';',','])
except csv.Error:
dialect = csv.excel
dialect.delimiter=delimiter
csvfile.seek(0)
csv_reader = csv.reader(csvfile, dialect)
for row in csv_reader:
r = []
for c in row:
if isinstance(c, basestring):
c=c.strip()
r.append(c)
items.append(r)
return items
# TODO: return desaplanar(items)
def aplanar(regs):
"Convierte una estructura python en planilla CSV (PyRece)"
from formato_xml import MAP_ENC
filas = []
for reg in regs:
fila = {}
for k in MAP_ENC:
fila[k] = reg[k]
fila['forma_pago']=reg['forma_pago']
for i, det in enumerate(reg['detalles']):
li = i+1
fila.update({
'codigo%s' % li: det['codigo'],
'descripcion%s' % li: det['ds'],
'umed%s' % li: det.get('umed'),
'cantidad%s' % li: det['qty'],
'precio%s' % li: det.get('precio'),
'importe%s' % li: det['importe'],
'iva_id%s' % li: det.get('iva_id'),
'imp_iva%s' % li: det.get('imp_iva'),
'numero_despacho%s' % li: det.get('numero_despacho'),
})
for i, iva in enumerate(reg['ivas']):
li = i+1
fila.update({
'iva_id_%s' % li: iva['iva_id'],
'iva_base_imp_%s' % li: iva['base_imp'],
'iva_importe_%s' % li: iva['importe'],
})
for i, tributo in enumerate(reg['tributos']):
li = i+1
fila.update({
'tributo_id_%s' % li: tributo['tributo_id'],
'tributo_base_imp_%s' % li: tributo['base_imp'],
'tributo_desc_%s' % li: tributo['desc'],
'tributo_alic_%s' % li: tributo['alic'],
'tributo_importe_%s' % li: tributo['importe'],
})
filas.append(fila)
cols = ["id",
"tipo_cbte","punto_vta","cbt_numero","fecha_cbte",
"tipo_doc","nro_doc","moneda_id","moneda_ctz",
"imp_neto","imp_iva","imp_trib","imp_op_ex","imp_tot_conc","imp_total",
"concepto","fecha_venc_pago","fecha_serv_desde","fecha_serv_hasta",
"cae","fecha_vto","resultado","motivo","reproceso",
"nombre","domicilio","localidad","telefono","categoria","email",
'numero_cliente', 'numero_orden_compra', 'condicion_frente_iva',
'numero_cotizacion', 'numero_remito',
"obs_generales", "obs_comerciales",
]
# filtro y ordeno las columnas
l = [k for f in filas for k in f.keys()]
s = set(l) - set(cols)
cols = cols + list(s)
ret = [cols]
for fila in filas:
ret.append([fila.get(k) for k in cols])
return ret
def desaplanar(filas):
"Dado una planilla, conviertir en estructura python"
from formato_xml import MAP_ENC
def max_li(colname):
tmp = max([int(k[len(colname):])+1 for k in filas[0] if k.startswith(colname)])
if max_li:
##print "max_li(%s)=%s" % (colname, tmp)
return tmp
else:
return 0
regs = []
for fila in filas[1:]:
dic = dict([(filas[0][i], v) for i, v in enumerate(fila)])
reg = {}
for k in MAP_ENC:
if k in dic:
reg[k] = dic.pop(k)
reg['detalles'] = [{
'codigo': dic.pop('codigo%s' % li),
'ds': dic.pop('descripcion%s' % li),
'umed': dic.pop('umed%s' % li),
'qty': dic.pop('cantidad%s' % li),
'precio': dic.pop('precio%s' % li),
'importe': dic.pop('importe%s' % li),
'iva_id': dic.pop('iva_id%s' % li),
'imp_iva': dic.pop('imp_iva%s'% li),
'numero_despacho': dic.pop('numero_despacho%s'% li),
} for li in xrange(1, max_li("cantidad"))
if dic['cantidad%s' % li] is not None]
reg['tributos'] = [{
'tributo_id': dic.pop('tributo_id_%s' % li),
'desc': dic.pop('tributo_desc_%s' % li),
'base_imp': dic.pop('tributo_base_imp_%s' % li),
'alic': dic.pop('tributo_alic_%s' % li),
'importe': dic.pop('tributo_importe_%s' % li),
} for li in xrange(1, max_li("tributo_id_"))
if dic['tributo_id_%s' % li]]
reg['ivas'] = [{
'iva_id': dic.pop('iva_id_%s' % li),
'base_imp': dic.pop('iva_base_imp_%s' % li),
'importe': dic.pop('iva_importe_%s' % li),
} for li in xrange(1, max_li("iva_id_"))
if dic['iva_id_%s' % li]]
reg['forma_pago'] = dic.pop('forma_pago')
# agrego campos adicionales:
reg['datos'] = [{
'campo': campo,
'valor': valor,
'pagina': '',
} for campo, valor in dic.items()
]
regs.append(reg)
return regs
def escribir(filas, fn="salida.csv", delimiter=";"):
"Dado una lista de comprobantes (diccionarios), aplana y escribe"
f = open(fn,"wb")
csv_writer = csv.writer(f, dialect='excel', delimiter=";")
# TODO: filas = aplanar(regs)
csv_writer.writerows(filas)
f.close()
# pruebas básicas
if __name__ == '__main__':
##import pdb; pdb.set_trace()
filas = leer("facturas-wsfev1-bis.csv")
regs1 = desaplanar(filas)
print filas
filas1 = aplanar(regs1)
print filas1
print filas1 == filas
escribir(filas1, "facturas-wsfev1-bis-sal.csv")