Python 用于打印数据帧的GUI
我有10个CSV文件,每个CSV文件都有相同数量的列,我从中以数据框的形式逐个读取数据。我希望这些数据以窗口或类似表格的形式显示。它应该像每次数据进入新行一样。有什么建议吗 下面是我的示例CSV文件: 像这样,有10个或更多的CSV文件,我将从这些文件中逐个读取数据,并希望在GUI中显示 我的应用程序简介 我有一台机器,它会在一定时间间隔后将CSV文件生成到一个文件夹中。我正在使用Watchdog库在生成CSV文件的文件夹上放置一块手表。当我收到一个CSV文件时,我将它读入一个数据框。上面给出了示例CSV文件 只要机器正在运行,它将继续生成CSV文件。因此,如果我想查看打开每个CSV文件所需的数据,我需要一个视图,在该视图中,当生成新的CSV文件时,数据会得到更新 所以从技术上讲,一个CSV文件被读取,被转换成一个数据帧,然后被插入到某种表视图中。当生成一个新的CSV文件时,这个过程会再次发生,但是现在数据应该保存在同一个表视图的下一行中 这是我的主要文件:Python 用于打印数据帧的GUI,python,python-3.x,pandas,pyqt,pyqt5,Python,Python 3.x,Pandas,Pyqt,Pyqt5,我有10个CSV文件,每个CSV文件都有相同数量的列,我从中以数据框的形式逐个读取数据。我希望这些数据以窗口或类似表格的形式显示。它应该像每次数据进入新行一样。有什么建议吗 下面是我的示例CSV文件: 像这样,有10个或更多的CSV文件,我将从这些文件中逐个读取数据,并希望在GUI中显示 我的应用程序简介 我有一台机器,它会在一定时间间隔后将CSV文件生成到一个文件夹中。我正在使用Watchdog库在生成CSV文件的文件夹上放置一块手表。当我收到一个CSV文件时,我将它读入一个数据框。上面给出
import time
from watchdog.observers import Observer
from watchdog.events import PatternMatchingEventHandler
import pandas as pd
from Append_Function import append_df_to_excel
import os.path
import sys
class Watcher:
def __init__(self, args):
self.watch_dir = os.getcwd()
print(args[0])
self.directory_to_watch = os.path.join(self.watch_dir, args[1])
self.observer = Observer()
self.event_handler = Handler(patterns=["*.CSV"], ignore_patterns=["*.tmp"], ignore_directories=True)
def run(self):
self.observer.schedule(self.event_handler, self.directory_to_watch, recursive=False)
self.observer.start()
try:
while True:
time.sleep(1)
except:
self.observer.stop()
print("Error")
self.observer.join()
class Handler(PatternMatchingEventHandler):
@staticmethod
def on_any_event(event):
if event.is_directory:
return None
elif event.event_type == 'created':
# Take any action here when a file is first created.
print("Received created event - %s." % event.src_path)
df = pd.read_csv(event.src_path, header=1, index_col=0)
append_df_to_excel(os.path.join(os.getcwd(), "myfile.xlsx"), df)
elif event.event_type == 'modified':
# Taken any actionc here when a file is modified.
df = pd.read_csv(event.src_path, header=0, index_col=0)
append_df_to_excel(os.path.join(os.getcwd(), "myfile.xlsx"), df)
print("Received modified event - %s." % event.src_path)
if __name__ == '__main__':
print(sys.argv)
w = Watcher(sys.argv)
w.run()
下面是我的Append函数:
import pandas as pd
import openpyxl as ox
def append_df_to_excel(filename, df, sheet_name='Sheet1', startrow=None,
truncate_sheet=False,
**to_excel_kwargs):
# ignore [engine] parameter if it was passed
if 'engine' in to_excel_kwargs:
to_excel_kwargs.pop('engine')
writer = pd.ExcelWriter(filename, engine='openpyxl')
# Python 2.x: define [FileNotFoundError] exception if it doesn't exist
try:
FileNotFoundError
except NameError:
FileNotFoundError = IOError
try:
# try to open an existing workbook
writer.book = ox.load_workbook(filename,keep_vba=True)
# get the last row in the existing Excel sheet
# if it was not specified explicitly
if startrow is None and sheet_name in writer.book.sheetnames:
startrow = writer.book[sheet_name].max_row
# truncate sheet
if truncate_sheet and sheet_name in writer.book.sheetnames:
# index of [sheet_name] sheet
idx = writer.book.sheetnames.index(sheet_name)
# remove [sheet_name]
writer.book.remove(writer.book.worksheets[idx])
# create an empty sheet [sheet_name] using old index
writer.book.create_sheet(sheet_name, idx)
# copy existing sheets
writer.sheets = {ws.title: ws for ws in writer.book.worksheets}
except FileNotFoundError:
# file does not exist yet, we will create it
pass
if startrow is None:
startrow = 0
# write out the new sheet
df.to_excel(writer, sheet_name, startrow=startrow, **to_excel_kwargs, header=True)
# save the workbook
writer.save()
必须通过循环添加数据帧:
import pandas as pd
from PyQt5 import QtCore, QtWidgets
class DataFrameTableWidget(QtWidgets.QTableWidget):
def append_dataframe(self, df):
df = df.copy()
if df.columns.size > self.columnCount():
self.setColumnCount(df.columns.size)
r = self.rowCount()
self.insertRow(r)
for c, column in enumerate(df):
it = QtWidgets.QTableWidgetItem(column)
self.setItem(r, c, it)
i = self.rowCount()
for r, row in df.iterrows():
self.insertRow(self.rowCount())
for c, (column, value) in enumerate(row.iteritems()):
it = QtWidgets.QTableWidgetItem(str(value))
self.setItem(i+r , c, it)
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
import numpy as np
w = DataFrameTableWidget()
df = pd.DataFrame(np.random.randint(0, 100,size=(4, 4)), columns=list('ABCD'))
w.append_dataframe(df)
def after_show():
df = pd.DataFrame(np.random.randint(0, 100,size=(4, 4)), columns=list('ABCD'))
w.append_dataframe(df)
QtCore.QTimer.singleShot(2*1000, after_show)
w.resize(640, 480)
w.show()
sys.exit(app.exec_())
更新:
观察者在另一个线程上运行,因此无法从该线程更新GUI,因此必须使用信号传输信息:
import os
import time
import pandas as pd
from watchdog.observers import Observer
from watchdog.events import PatternMatchingEventHandler
from PyQt5 import QtCore, QtWidgets
from Append_Function import append_df_to_excel
class Emitter(QtCore.QObject):
newDataFrameSignal = QtCore.pyqtSignal(pd.DataFrame)
class Watcher:
def __init__(self, filename):
self.watch_dir = os.getcwd()
self.directory_to_watch = os.path.join(self.watch_dir, filename)
self.emitter = Emitter()
self.observer = Observer()
self.event_handler = Handler(
emitter=self.emitter,
patterns=["*.CSV"],
ignore_patterns=["*.tmp"],
ignore_directories=True
)
def run(self):
self.observer.schedule(self.event_handler, self.directory_to_watch, recursive=False)
self.observer.start()
class Handler(PatternMatchingEventHandler):
def __init__(self, *args, emitter=None, **kwargs):
super(Handler, self).__init__(*args, **kwargs)
self._emitter = emitter
def on_any_event(self, event):
if event.is_directory:
return None
elif event.event_type == 'created':
# Take any action here when a file is first created.
print("Received created event - %s." % event.src_path)
df = pd.read_csv(event.src_path, header=1)
self._emitter.newDataFrameSignal.emit(df.copy())
df.set_index(df.columns.values.tolist()[0], inplace=True)
append_df_to_excel(os.path.join(os.getcwd(), "myfile.xlsx"), df)
elif event.event_type == 'modified':
# Taken any actionc here when a file is modified.
df = pd.read_csv(event.src_path, header=1)
self._emitter.newDataFrameSignal.emit(df.copy())
df.set_index(df.columns.values.tolist()[0], inplace=True)
append_df_to_excel(os.path.join(os.getcwd(), "myfile.xlsx"), df)
print("Received modified event - %s." % event.src_path)
class DataFrameTableWidget(QtWidgets.QTableWidget):
@QtCore.pyqtSlot(pd.DataFrame)
def append_dataframe(self, df):
df = df.copy()
if df.columns.size > self.columnCount():
self.setColumnCount(df.columns.size)
r = self.rowCount()
self.insertRow(r)
for c, column in enumerate(df):
it = QtWidgets.QTableWidgetItem(column)
self.setItem(r, c, it)
i = self.rowCount()
for r, row in df.iterrows():
self.insertRow(self.rowCount())
for c, (column, value) in enumerate(row.iteritems()):
it = QtWidgets.QTableWidgetItem(str(value))
self.setItem(i+r , c, it)
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
w = DataFrameTableWidget()
w.resize(640, 480)
w.show()
watcher = Watcher(sys.argv[1])
watcher.run()
watcher.emitter.newDataFrameSignal.connect(w.append_dataframe)
sys.exit(app.exec_())
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如果您的CSV文件具有相同的标题,您可能希望将数据连接到以供查看。是否将CSV中的数据直接读取到数据框中?你只是想要一种可视化的方式吗?是的,这正是我想要做的。你想要一个带有表格小部件(可以实时更新)的完整GUI吗?我可能会推荐pyqt5:。否则,如果你想要一些轻量的东西,请看。@Error-syntactical懊悔谢谢,我一定会看的。@S.Nick当然,先生,我会更新我的postWow!你这么快就实现了!太棒了!让我试试,我会让你知道的!我还需要使用PandaModel类吗?@ViralParmar这是不必要的。现在我有一个问题,我想在视图中添加一个数据帧后更新Pyqt表视图小部件,依此类推。您在这里所做的是附加所有数据,然后显示表视图。@ViralParamr我修改了示例,以便您可以看到数据帧可以在小部件显示之前或之后添加。我能否在CSV查看器的下一行中逐个添加数据帧?不,它是查看器,不是编辑器。如果你想共同链接你的文件,看看我答案中的最后一个链接。我正在更新我的问题,那么我想你会知道确切的问题。