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Tables_IO.py
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170 lines (147 loc) · 6.21 KB
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#!/usr/bin/env python
"""
Import and export classes.
Created Oct 2008
Copyright (C) Damien Farrell
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 2
of the License, 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
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""
from tkinter import *
import Pmw
import os, csv
import tkinter.filedialog
class TableImporter:
"""Provides import utility methods for the Table and Table Model classes"""
def __init__(self):
"""Setup globals"""
#self.separator = ','
self.separator_list = {',':',',' ':'space','\t':'tab','blank':' ',':':':'}
self.var_sep = StringVar()
self.var_sep.set(',')
return
def import_Dialog(self, parent):
"""Allows user to set some import options"""
self.parent=parent
self.master=Toplevel()
self.master.title("Import Data")
self.xsize = 450
self.ysize = 370
top=self.master.winfo_toplevel()
rootx=top.winfo_rootx()
rooty=top.winfo_rooty()
self.sep_choice = Pmw.OptionMenu(
parent = self.master,labelpos = 'w',
label_text = 'Record separator:',
menubutton_textvariable = self.var_sep,
items = list(self.separator_list.keys()),
initialitem = ',',
menubutton_width = 4,
command= self.update_display)
self.sep_choice.grid(row=0,column=0,sticky='nw',padx=2,pady=2)
#place for text preview frame
self.textframe=Pmw.ScrolledFrame(self.master,
labelpos = 'n', label_text = 'Preview',
usehullsize = 1,
hull_width = 450,
hull_height = 300)
self.textframe.grid(row=1,column=0,columnspan=5,sticky='news',padx=2,pady=2)
self.previewarea = Text(self.textframe.interior(), bg='white', width=400, height=500)
self.previewarea.pack(fill=BOTH, expand=1)
#buttons
self.openButton = Button(self.master, text = 'Open File',
command = self.do_openFile )
self.openButton.grid(row=3,column=0,sticky='news',padx=2,pady=2)
self.importButton = Button(self.master, text = 'Do Import',
command = self.do_ModelImport )
self.importButton.grid(row=3,column=1,sticky='news',padx=2,pady=2)
self.CancelButton = Button(self.master, text = 'Cancel',
command = self.close )
self.CancelButton.grid(row=3,column=2,sticky='news',padx=2,pady=2)
self.master.columnconfigure(0,weight=1)
self.master.rowconfigure(1,weight=1)
return self.master
def do_openFile(self):
self.datafile = self.open_File(self.parent)
self.update_display()
return
def open_File(self, parent):
savedir = os.getcwd()
filename=tkinter.filedialog.askopenfile(defaultextension='.csv',
initialdir=savedir,
initialfile='',
filetypes=[("Data file","*.csv"),
("All files","*.*")],
title='Choose data from a .csv file saved as excel spreadsheet in .csv format (comma separated list)',
parent=parent)
if filename and os.path.exists(filename.name) and os.path.isfile(filename.name):
datafile = filename.name
return datafile
def update_display(self,evt=None):
"""Preview loaded file"""
sep = self.var_sep.get()
self.previewarea.delete(1.0, END)
reader = csv.reader(open(self.datafile, "rb"), delimiter=sep)
for row in reader:
self.previewarea.insert(END,row)
self.previewarea.insert(END,'\n')
return
def do_ModelImport(self):
"""imports and places the result in self.modeldata"""
self.data = self.ImportTableModel(self.datafile)
self.close()
return
def ImportTableModel(self,filename):
"""Import table data from a comma separated file and create data for a model
This is reusable outside the GUI dialog also."""
if not os.path.isfile(filename):
return None
try:
sep = self.var_sep.get()
except:
sep = ','
#takes first row as field names
dictreader = csv.DictReader(open(filename, "rb"), delimiter=sep)
dictdata = {}
count=0
for rec in dictreader:
dictdata[count]=rec
count=count+1
return dictdata
def close(self):
self.master.destroy()
return
class TableExporter:
def __init__(self):
"""Provides export utility methods for the Table and Table Model classes"""
return
def ExportTableData(self, table, sep=None):
"""Export table data to a comma separated file"""
parent=table.parentframe
filename = tkinter.filedialog.asksaveasfilename(parent=parent,defaultextension='.csv',
filetypes=[("CSV files","*.csv")] )
if not filename:
return
if sep == None:
sep = ','
writer = csv.writer(file(filename, "w"), delimiter=sep)
model=table.getModel()
recs = model.getAllCells()
#take column labels as field names
colnames = model.columnNames
collabels = model.columnlabels
row=[]
for c in colnames:
row.append(collabels[c])
writer.writerow(row)
for row in list(recs.keys()):
writer.writerow(recs[row])
return