----How The Problem Looks Like----
after I clicked on the Record button, it becomes this
As you can see, the table just shifted to the left, hiding the vertical headers.
----Related Codes----
My tableivew is called tableViewTransaction, it uses a model to link to data in pandas' dataframe format. Here is how I connected them together inside the __init__ function of a QMainWindow.
self.data = pd.read_csv('transactions.txt', sep='\t', header=None)
self.data.columns = ["Name", "Price", "Action"]
self.model = PandasModel(self.data)
self.tableViewTransaction.setModel(self.model)
Here is my Model for the TableView
class PandasModel(QtCore.QAbstractTableModel):
def __init__(self, df = pd.DataFrame(), parent=None):
QtCore.QAbstractTableModel.__init__(self, parent=parent)
self._df = df
def headerData(self, section, orientation, role=QtCore.Qt.DisplayRole):
if role != QtCore.Qt.DisplayRole:
return QtCore.QVariant()
if orientation == QtCore.Qt.Horizontal:
try:
return self._df.columns.tolist()[section]
except (IndexError, ):
return QtCore.QVariant()
elif orientation == QtCore.Qt.Vertical:
try:
# return self.df.index.tolist()
return self._df.index.tolist()[section]
except (IndexError, ):
return QtCore.QVariant()
def data(self, index, role=QtCore.Qt.DisplayRole):
if role != QtCore.Qt.DisplayRole:
return QtCore.QVariant()
if not index.isValid():
return QtCore.QVariant()
return QtCore.QVariant(str(self._df.ix[index.row(), index.column()]))
def setData(self, index, value, role):
row = self._df.index[index.row()]
col = self._df.columns[index.column()]
if hasattr(value, 'toPyObject'):
# PyQt4 gets a QVariant
value = value.toPyObject()
else:
# PySide gets an unicode
dtype = self._df[col].dtype
if dtype != object:
value = None if value == '' else dtype.type(value)
self._df.set_value(row, col, value)
return True
def rowCount(self, parent=QtCore.QModelIndex()):
return len(self._df.index)
def columnCount(self, parent=QtCore.QModelIndex()):
return len(self._df.columns)
def sort(self, column, order):
colname = self._df.columns.tolist()[column]
self.layoutChanged.emit()
self._df.sort_values(colname, ascending= order == QtCore.Qt.AscendingOrder, inplace=True)
self._df.reset_index(inplace=True, drop=True)
self.layoutChanged.emit()
When the Record button is pressed, the following function is called:
def recordTransaction(self):
name = self.comboBoxStock.currentText()
price = self.lineEditMoney.text()
action = self.comboBoxAction.currentText()
self.data.loc[len(self.data.index)] = [name, price, action]
self.tableViewTransaction.model().layoutChanged.emit()
I know that name, price, action here is storing the correct information i.e. "stock1", "2", "Buy" in my above example.
----Full Code----
https://drive.google.com/file/d/1rU66yLqlQu0bTdINkSWxJe2E_OdMtS0i/view?usp=sharing
How to use:
first unzip it, then use python3 to run StockSim.py.
On a mac, just run python3 StockSim.py when you have went to the Stock Sim directory using terminal. Make sure you have python3 and pyqt5 installed first.
----------------------
All I want is that the TableView not shift to the left, any of your help would be very much appreciated!
Related
i am using PandasModel(QAbstractTableModel) to show data in a qtableView. it's working fine with less data. but whenever i tried with large datas it became slow. for 5000 rows data it almost took 20-25 seconds .it just take a seconds in mssql mgmt studio to run the query. i am not getting where i did wrong with my codes.
class PandasModel(QtCore.QAbstractTableModel):
def __init__(self, df = pd.DataFrame(), parent=None):
QtCore.QAbstractTableModel.__init__(self, parent=parent)
self._df = df
def headerData(self, section, orientation, role=QtCore.Qt.DisplayRole):
if role != QtCore.Qt.DisplayRole:
return QtCore.QVariant()
if orientation == QtCore.Qt.Horizontal:
try:
return self._df.columns.tolist()[section]
except (IndexError, ):
return QtCore.QVariant()
elif orientation == QtCore.Qt.Vertical:
try:
return self._df.index.tolist()[section]+1
except (IndexError, ):
return QtCore.QVariant()
def data(self, index, role=QtCore.Qt.DisplayRole):
if role != QtCore.Qt.DisplayRole:
return QtCore.QVariant()
if not index.isValid():
return QtCore.QVariant()
return QtCore.QVariant(str(self._df.iloc[index.row(), index.column()]))
def setData(self, index, value, role):
if not index.isValid():
return False
if role != QtCore.Qt.EditRole:
return False
row = index.row()
if row < 0 or row >= len(self._data.values):
return False
column = index.column()
if column < 0 or column >= self._data.columns.size:
return False
self._data.values[row][column] = value
self.dataChanged.emit(index, index)
return True
def rowCount(self, parent=QtCore.QModelIndex()):
return len(self._df.index)
def columnCount(self, parent=QtCore.QModelIndex()):
return len(self._df.columns)
def sort(self, column, order):
colname = self._df.columns.tolist()[column]
self.layoutAboutToBeChanged.emit()
self._df.sort_values(colname, ascending= order == QtCore.Qt.AscendingOrder, inplace=True)
self._df.reset_index(inplace=True, drop=True)
self.layoutChanged.emit()
i tried many approaches like st the chunksize , but not working. please help me out
sql_conn = pyodbc.connect('DRIVER={ODBC Driver 17 for SQL Server};SERVER=' +
server+';DATABASE='+database+';UID='+username+';PWD=' + password)
cursor = sql_conn.cursor()
def loadTranForACC(AccountID):
query_string="Select * from user.dbo.Transaction(nolock) where accID =" + AccountID
data=pd.read_sql_query(query_string, sql_conn)
return data
Since you are working with the data from Database, I'd like to point out that PyQt has
QSqlTableModel and QSqlQueryModel to work with the data from database.
Looking at your model, to me, the model looks fine, try to see exactly what part of your program is eating up time.
You can look at these threads for more information and details regarding these:
qtablewidget becomes slow for large tables
pyqt qtablewidget extremely slow
The ultimate solution though would be to use pagination, show only 500,1000 rows at a time, it will run within a fraction of seconds.
You can visit these threads to implement pagination: QT Forum | Pagination in QTableWidget or Paginated Display of Table Data in PyQt
i want to set a comboBox and show my table's column1 data as items and associated value column2 is for selected item id and want to setText in a qLabel.
i am using a model to view the items in comboBox and working fine. i can get the currentText value but how to get the associated value for the items.
in my case :
my sql table like:
type id
------------
DIV 2
TRANS 33
FEE 41
EXP 89
now , i can set the column1(type) values into comboBox successfully. now, if user selected value 'FEE' , than qlable should be updated as its associate id : 41. how to do that!
df=loadData()
model=PandasModel(df)
self.comboBox.setModel(model)
self.comboBox.setModelColumn(0)
content=self.comboBox.currentText()
self.label.setText(content) # content should be ID instead of currentText
pandasMode:
class PandasModel(QtCore.QAbstractTableModel):
def __init__(self, df = pd.DataFrame(), parent=None):
QtCore.QAbstractTableModel.__init__(self, parent=parent)
self._df = df
def headerData(self, section, orientation, role=QtCore.Qt.DisplayRole):
if role != QtCore.Qt.DisplayRole:
return QtCore.QVariant()
if orientation == QtCore.Qt.Horizontal:
try:
return self._df.columns.tolist()[section]
except (IndexError, ):
return QtCore.QVariant()
elif orientation == QtCore.Qt.Vertical:
try:
return self._df.index.tolist()[section]+1
except (IndexError, ):
return QtCore.QVariant()
def data(self, index, role=QtCore.Qt.DisplayRole):
if index.isValid():
if role == QtCore.Qt.DisplayRole:
return str(self._df.iloc[index.row(), index.column()])
return None
def setData(self, index, value, role):
if not index.isValid():
return False
if role != QtCore.Qt.EditRole:
return False
row = index.row()
if row < 0 or row >= len(self._df.values):
return False
column = index.column()
if column < 0 or column >= self._df.columns.size:
return False
self._df.values[row][column] = value
self.dataChanged.emit(index, index)
return True
# def rowCount(self, parent=QtCore.QModelIndex()):
# return len(self._df.index)
def rowCount(self, parent=None):
return len(self._df.index)
def columnCount(self, parent=QtCore.QModelIndex()):
return len(self._df.columns)
def sort(self, column, order):
colname = self._df.columns.tolist()[column]
self.layoutAboutToBeChanged.emit()
self._df.sort_values(colname, ascending= order == QtCore.Qt.AscendingOrder, inplace=True)
self._df.reset_index(inplace=True, drop=True)
self.layoutChanged.emit()
Assuming that the model stores the id in the second column then it has to obtain the associated index:
ID_COLUMN = 1
index = self.comboBox.model().index(
self.comboBox.currentIndex(), ID_COLUMN, self.comboBox.rootModelIndex()
)
id_ = index.data()
print(id_)
self.label.setText(id_)
So, Im currently taking just limited data from a ZeroMQ Messaging system appending it all to a Dataframe and then turning the Dataframe into a pandas model with code I acquired from someone on stack. Then running that model through a PyQt5 Tableview.
Every time I run the tableview code, after converting my Dataframe to a model for Tableview the kernal just dies. I tried to at least handle a exception but it wont even raise a runtimeerror that is super general. It just dies every time....
For the purpose of the test im using a CSV with data to try to get this into a workable model. You can use any csv or data you have on your end to test this as theres no hard coded formatting.
from PyQt5 import QtCore, QtGui, QtWidgets
import pandas as pd
class PandasModel(QtCore.QAbstractTableModel):
def __init__(self, df = pd.DataFrame(), parent=None):
QtCore.QAbstractTableModel.__init__(self, parent=parent)
self._df = df
def headerData(self, section, orientation, role=QtCore.Qt.DisplayRole):
if role != QtCore.Qt.DisplayRole:
return QtCore.QVariant()
if orientation == QtCore.Qt.Horizontal:
try:
return self._df.columns.tolist()[section]
except (IndexError, ):
return QtCore.QVariant()
elif orientation == QtCore.Qt.Vertical:
try:
# return self.df.index.tolist()
return self._df.index.tolist()[section]
except (IndexError, ):
return QtCore.QVariant()
def data(self, index, role=QtCore.Qt.DisplayRole):
if role != QtCore.Qt.DisplayRole:
return QtCore.QVariant()
if not index.isValid():
return QtCore.QVariant()
return QtCore.QVariant(str(self._df.ix[index.row(), index.column()]))
def setData(self, index, value, role):
row = self._df.index[index.row()]
col = self._df.columns[index.column()]
if hasattr(value, 'toPyObject'):
# PyQt4 gets a QVariant
value = value.toPyObject()
else:
# PySide gets an unicode
dtype = self._df[col].dtype
if dtype != object:
value = None if value == '' else dtype.type(value)
self._df.set_value(row, col, value)
return True
def rowCount(self, parent=QtCore.QModelIndex()):
return len(self._df.index)
def columnCount(self, parent=QtCore.QModelIndex()):
return len(self._df.columns)
def sort(self, column, order):
colname = self._df.columns.tolist()[column]
self.layoutAboutToBeChanged.emit()
self._df.sort_values(colname, ascending= order == QtCore.Qt.AscendingOrder, inplace=True)
self._df.reset_index(inplace=True, drop=True)
self.layoutChanged.emit()
def createview(title, model):
try:
view = QtWidgets.QTableView()
view.setWindowview
except:
raise RuntimeError("I know python!")
if __name__=="__main__":
df=pd.read_csv("C:\Excel Sheets\Test_CSV_6-18-18.csv")
model = PandasModel(df)
createview("Model", model)
I'am using PySide2 and want to search a QListView for a value and have that row selected. Like you can with .findText(string_to_search_for) on a QComboBox.
How can i search for a value in a Qlistview and have the index returned?
some additional info:
The model of my QListView is implementation of QAbstractTableModel i've written.
The model is filled with data from a database, in the first column the id and 2nd column the name of the Database item. The QListView is only showing the 2nd column. This is my code for the QTableModel.
from PySide2 import QtGui,QtCore
class TwoColumnTableModel(QtCore.QAbstractTableModel):
def __init__(self, row_data=[], column_data=[], parent=None):
QtCore.QAbstractTableModel.__init__(self, parent)
self.row_data = row_data
self.column_data = column_data
def rowCount(self, parent):
return len(self.row_data)
def columnCount(self, parent):
return len(self.column_data)
def flags(self, index):
return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable
def data(self, index, role):
if role == QtCore.Qt.DisplayRole:
row = index.row()
column = index.column()
value = self.row_data[row][column]
self.dataChanged.emit(row, column, [])
return value
def headerData(self, section, orientation, role):
if role == QtCore.Qt.DisplayRole:
if orientation == QtCore.Qt.Horizontal:
if section < len(self.column_data):
return self.column_data[section]
else:
return "TEMP COL"
def insertRows(self, position, rows, data=[], parent=QtCore.QModelIndex()):
self.beginInsertRows(parent, position, position + rows - 1)
for i in range(len(data)):
columns = []
row_column1 = data[i][0]
row_column2 = data[i][1]
columns.insert(0, row_column1)
columns.insert(1, row_column2)
self.row_data.insert(position, columns)
self.endInsertRows()
return True
def removeRows(self, position, rows, parent=QtCore.QModelIndex()):
self.beginRemoveRows()
for i in range(rows):
value = self.row_data[position]
self.row_data.remove(value)
self.endRemoveRows()
return True
I ended up creating the following function in QTableModel class:
def find_index_of_value(self, search_string, search_column):
for index in range(self.rowCount(None)):
model_index = self.index(index, 1)
index_value = self.data(model_index, search_column)
if index_value == search_string:
return model_index
The "search_string" being the string i'm looking for and the "search_column" being the column of the model where i want to search for that string. With the return index i can use the setCurrentIndex(index) on my QListView and that's it.
I'm relatively new to Python and especially PyQt and model-view programming. I want to have it so that someone can only enter integers in my table and not letters/symbols etc. Here's the model I've made so far for my tableView widget:
class PixelTableModel(QtCore.QAbstractTableModel):
def __init__(self):
super(PixelTableModel, self).__init__()
self.pixel_coordinate = [[None, None, None, None]]
def rowCount(self, parent):
return 1
def columnCount(self, parent):
return 4
def flags(self, index):
return QtCore.Qt.ItemIsEditable | QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable
def setData(self, index, value, role = QtCore.Qt.EditRole):
if role == QtCore.Qt.EditRole:
row = index.row()
column = index.column()
self.pixel_coordinate[row][column] = value
print(self.pixel_coordinate) #testing
return True
return False
def data(self, index, role):
if role == QtCore.Qt.DisplayRole:
row = index.row()
column = index.column()
value = self.pixel_coordinate[row][column]
return value
def headerData(self, section, orientation, role): # section = row column, orientation = vertical/horizontal
if role == QtCore.Qt.DisplayRole:
if orientation == QtCore.Qt.Horizontal:
dict = {0: "Xstart", 1: "Ystart", 2: "Xmax", 3: "Ymax"}
for key in dict:
if section == key:
return dict[key]
else:
return "Pixel coordinate"
It seems to work except obviously for the part where it still can take letters/symbols as input in the tableView. I've tried a couple of things in the setData() method but can't seem to get it work, always get some type of error or it won't even change the box at all. Thanks to anyone that can help me with this. Also sorry for bad English.
For anyone still interested, after going through it again fixed it with simple try except block:
def setData(self, index, value, role = QtCore.Qt.EditRole):
if role == QtCore.Qt.EditRole:
try:
row = index.row()
column = index.column()
string_to_int = int(value)
self.pixel_coordinate[row][column] = value
print(self.pixel_coordinate) #testing
return True
except ValueError:
print("Not a number")
return False
return False