Python/wxPython:将CSV文件导入到wxGrid时显示不适合框架 [英] Python/wxPython: Importing CSV file onto wxGrid not displaying to fit on frame
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问题描述
我正在一个项目中，我必须将CSV文件导入wx.Grid以进行进一步的操作.我在这里搜索并找到了一种有用的方法
Am working on a project where I have to import CSV files into wx.Grid for further manipulations. I have searched and found a useful way here http://wxpython-users.1045709.n5.nabble.com/new-to-the-list-opening-a-text-file-in-a-grid-using-splitterwindows-td2373808.html
现在，我的CSV似乎根本没有显示在我的屏幕框架上(按照下面的代码)?可以解决这个问题吗?
Now my CSV never seems to display on my screen frame at all (as per the code below)? Any way around this?
csv1.py 是GUI
class MyFrame3 ( wx.Frame ):
def __init__( self, parent ):
wx.Frame.__init__ ( self, parent, id = wx.ID_ANY, title = wx.EmptyString, pos = wx.DefaultPosition, size = wx.Size( 900,600 ), style = wx.CAPTION|wx.CLOSE_BOX|wx.MINIMIZE_BOX|wx.SYSTEM_MENU|wx.TAB_TRAVERSAL )
self.SetSizeHintsSz( wx.DefaultSize, wx.DefaultSize )
Sizer1 = wx.BoxSizer( wx.HORIZONTAL )
Sizer1.SetMinSize( wx.Size( 0,0 ) )
self.Right_Panel = wx.Panel( self, wx.ID_ANY, wx.DefaultPosition, wx.DefaultSize, wx.TAB_TRAVERSAL )
RightSizer = wx.BoxSizer( wx.VERTICAL )
self.Right_Panel.SetSizer( RightSizer )
self.Right_Panel.Layout()
RightSizer.Fit( self.Right_Panel )
Sizer1.Add( self.Right_Panel, 1, wx.EXPAND |wx.ALL, 5 )
self.Left_Panel = wx.Panel( self, wx.ID_ANY, wx.DefaultPosition, wx.DefaultSize, wx.TAB_TRAVERSAL )
LeftSizer = wx.BoxSizer( wx.VERTICAL )
self.ImportButton = wx.Button( self.Left_Panel, wx.ID_ANY, u"Import CSV File", wx.DefaultPosition, wx.DefaultSize, 0 )
LeftSizer.Add( self.ImportButton, 0, wx.ALL, 5 )
self.Left_Panel.SetSizer( LeftSizer )
self.Left_Panel.Layout()
LeftSizer.Fit( self.Left_Panel )
Sizer1.Add( self.Left_Panel, 0, wx.EXPAND |wx.ALL, 5 )
self.SetSizer( Sizer1 )
self.Layout()
self.menubar = wx.MenuBar( 0 )
self.fileMenu = wx.Menu()
self.importMenu = wx.MenuItem( self.fileMenu, wx.ID_ANY, u"Import", wx.EmptyString, wx.ITEM_NORMAL )
self.fileMenu.AppendItem( self.importMenu )
self.menubar.Append( self.fileMenu, u"&File" )
self.SetMenuBar( self.menubar )
self.Centre( wx.BOTH )
# Connect Events
self.ImportButton.Bind( wx.EVT_BUTTON, self.ImportFunc )
self.Bind( wx.EVT_MENU, self.ImportFunc, id = self.importMenu.GetId() )
class csv_view(wx.App):
def OnInit(self):
self.frame=MyFrame3(None, -1, 'PyStereo', size=(900,600))
self.SetTopWindow(self.frame)
return True
csv2.py 是正在运行的脚本
#!/usr/bin/python
# -*- coding: utf-8 -*-
import wx
import os
import numpy as np
import sys, csv
import wx.grid
from csv1 import MyFrame3, csv_view
class MyFrame(MyFrame3):
def __init__(self, parent, size = wx.Size(900,600)):
MyFrame3.__init__ (self, parent)
self.dirname = os.getcwd()
# Import/Open CSV
def ImportFunc( self, event ):
'''THIS IMPORTED CSV WILL NEVER EXPAND TO FIT INTO THE FRAME, PLEASE HELP?'''
dlg=wx.FileDialog(self, 'Choose a file', self.dirname, '','CSV files (*.csv)|*.csv|All files(*.*)|*.*',wx.OPEN)
if dlg.ShowModal() == wx.ID_OK:
self.dirname=dlg.GetDirectory()
self.filename=os.path.join(self.dirname,dlg.GetFilename())
self.file=file(self.filename, 'r')
#check for file format with sniffer
dialect = csv.Sniffer().sniff(self.file.read(1024))
self.file.seek(0)
csvfile=csv.reader(self.file,dialect)
filedata = [] #put contents of csvfile into a list
filedata.extend(csvfile)
self.file.seek(0)
#grab a sample and see if there is a header
sample=self.file.read(2048)
self.file.seek(0)
if csv.Sniffer().has_header(sample): #if there is a header
colnames=csvfile.next() # label columns from first line
datalist=[] # create a list without the header
datalist.extend(filedata[1:len(filedata)]) #append data without header
else:
row1=csvfile.next() #if there is NO header
colnames=[]
for i in range(len(row1)):
colnames.append('col_%d' % i) # label columns as col_1, col_2, etc
self.file.seek(0)
datalist=filedata #append data to datalist
self.file.close()
self.createGrid(datalist, colnames)
#create the grid
def createGrid(self, datalist, colnames):
if getattr(self, 'grid', 0): self.grid.Destroy()
self.grid=wx.grid.Grid(self, 0)
self.grid.CreateGrid(len(datalist), len(colnames)) #create grid, same size as file (rows, cols)
#fill in headings
for i in range(len(colnames)):
self.grid.SetColLabelValue(i, colnames[i])
#populate the grid
for row in range(len(datalist)):
for col in range(len(colnames)):
try:
self.grid.SetCellValue(row,col,datalist[row][col])
except:
pass
self.grid.AutoSizeColumns(False) # size columns to data (from cvsomatic.py)
self.twiddle()
def twiddle(self): # from http://www.velocityreviews.com/forums/t330788-how-to-update-window-after-wxgrid-is-updated.html
x,y = self.GetSize()
self.SetSize((x, y+1))
self.SetSize((x,y))
def Exit(self, event):
if getattr(self, 'file',0):
self.file.close()
self.Close(True)
# class csv_view(wx.App):
# def OnInit(self):
# self.frame=MyFrame(None, -1, 'show CSV', size=(900,600))
# self.SetTopWindow(self.frame)
# return True
# app=csv_view()
# app.MainLoop()
app = wx.App(0)
Frame_02 = MyFrame(None)
Frame_02.Show()
app.MainLoop()
非常感谢您的帮助.
推荐答案
最大的问题是您有育儿问题.创建网格窗口小部件时，将其添加到框架中，而不添加到大小调整器中.这导致将网格初始化为较小的尺寸，并将其堆叠在面板顶部.要解决此问题，您需要将网格的父级设置为面板之一，将网格添加到大小调整器，然后在面板上调用Layout.这是 csv2.py 的更新代码:
The biggest issue is that you have a parenting problem. When you create the grid widget, you add it to the frame, but not to a sizer. That causes the grid to be initialized to a small size and it gets stacked on top of the panel. To fix this, you need to set the parent of the grid to one of the panels, add the grid to a sizer and then call Layout on the panel. Here's the updated code for csv2.py:
import wx
import os
import sys, csv
import wx.grid
from csv1 import MyFrame3
class MyFrame(MyFrame3):
def __init__(self, parent, size = wx.Size(900,600)):
MyFrame3.__init__ (self, parent)
self.dirname = os.getcwd()
# Import/Open CSV
def ImportFunc( self, event ):
'''THIS IMPORTED CSV WILL NEVER EXPAND TO FIT INTO THE FRAME, PLEASE HELP?'''
dlg=wx.FileDialog(self, 'Choose a file', self.dirname, '','CSV files (*.csv)|*.csv|All files(*.*)|*.*',wx.OPEN)
if dlg.ShowModal() == wx.ID_OK:
self.dirname=dlg.GetDirectory()
self.filename=os.path.join(self.dirname,dlg.GetFilename())
self.file=file(self.filename, 'r')
#check for file format with sniffer
dialect = csv.Sniffer().sniff(self.file.read(1024))
self.file.seek(0)
csvfile=csv.reader(self.file,dialect)
filedata = [] #put contents of csvfile into a list
filedata.extend(csvfile)
self.file.seek(0)
#grab a sample and see if there is a header
sample=self.file.read(2048)
self.file.seek(0)
if csv.Sniffer().has_header(sample): #if there is a header
colnames=csvfile.next() # label columns from first line
datalist=[] # create a list without the header
datalist.extend(filedata[1:len(filedata)]) #append data without header
else:
row1=csvfile.next() #if there is NO header
colnames=[]
for i in range(len(row1)):
colnames.append('col_%d' % i) # label columns as col_1, col_2, etc
self.file.seek(0)
datalist=filedata #append data to datalist
self.file.close()
self.createGrid(datalist, colnames)
grid_sizer = wx.BoxSizer(wx.VERTICAL)
grid_sizer.Add(self.grid, 1, wx.EXPAND)
self.Right_Panel.SetSizer(grid_sizer)
self.Right_Panel.Layout()
#create the grid
def createGrid(self, datalist, colnames):
if getattr(self, 'grid', 0): self.grid.Destroy()
self.grid=wx.grid.Grid(self.Right_Panel, 0)
self.grid.CreateGrid(len(datalist), len(colnames)) #create grid, same size as file (rows, cols)
#fill in headings
for i in range(len(colnames)):
self.grid.SetColLabelValue(i, colnames[i])
#populate the grid
for row in range(len(datalist)):
for col in range(len(colnames)):
try:
self.grid.SetCellValue(row,col,datalist[row][col])
except:
pass
self.grid.AutoSizeColumns(False) # size columns to data (from cvsomatic.py)
self.twiddle()
def twiddle(self): # from http://www.velocityreviews.com/forums/t330788-how-to-update-window-after-wxgrid-is-updated.html
x,y = self.GetSize()
self.SetSize((x, y+1))
self.SetSize((x,y))
def Exit(self, event):
if getattr(self, 'file',0):
self.file.close()
self.Close(True)
import wx.lib.mixins.inspection
app = wx.App(0)
Frame_02 = MyFrame(None)
Frame_02.Show()
wx.lib.inspection.InspectionTool().Show()
app.MainLoop()
我还向您的代码添加了小部件检查工具"，以帮助我弄清楚面板的布局方式以及放置网格的位置.这对于找出小部件布局问题非常有用.您可以在wxPython Wiki上阅读有关此便捷工具的更多信息:
I also added the Widget Inspection Tool to your code to help me figure out how the panels were laid out and where to put the grid. It is very useful for figuring out problems with widget layout. You can read more about this handy tool on the wxPython wiki:
这篇关于Python/wxPython:将CSV文件导入到wxGrid时显示不适合框架的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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