python3+PyQt5 使用三种不同的简便项窗口部件显示数据的方法

 更新时间:2019年06月17日 11:08:27   作者:basisworker  
今天小编就为大家分享一篇python3+PyQt5 使用三种不同的简便项窗口部件显示数据的方法,具有很好的参考价值,希望对大家有所帮助。一起跟随小编过来看看吧

本文通过将同一个数据集在三种不同的简便项窗口部件中显示。三个窗口的数据得到实时的同步,数据和视图分离。当添加或删除数据行,三个不同的视图均保持同步。数据将保存在本地文件中,而非数据库。对于小型和临时性数据集来说,这些简便窗口部件非常有用,可以用在非单独数据集中-数据自身的显示,编辑和存储。

所使用的数据集:

/home/yrd/eric_workspace/chap14/ships_conv/ships.py

#!/usr/bin/env python3

import platform
from PyQt5.QtCore import QDataStream, QFile,QIODevice,Qt
from PyQt5.QtWidgets import QApplication
NAME, OWNER, COUNTRY, DESCRIPTION, TEU = range(5)

MAGIC_NUMBER = 0x570C4
FILE_VERSION = 1


class Ship(object):

  def __init__(self, name, owner, country, teu=0, description=""):
    self.name = name
    self.owner = owner
    self.country = country
    self.teu = teu
    self.description = description


  def __hash__(self):
    return super(Ship, self).__hash__()


  def __lt__(self, other):
    return bool(self.name.lower()<other.name.lower())


  def __eq__(self, other):
    return bool(self.name.lower()==other.name.lower())


class ShipContainer(object):

  def __init__(self, filename=""):
    self.filename = filename
    self.dirty = False
    self.ships = {}
    self.owners = set()
    self.countries = set()


  def ship(self, identity):
    return self.ships.get(identity)


  def addShip(self, ship):
    self.ships[id(ship)] = ship
    self.owners.add(str(ship.owner))
    self.countries.add(str(ship.country))
    self.dirty = True


  def removeShip(self, ship):
    del self.ships[id(ship)]
    del ship
    self.dirty = True


  def __len__(self):
    return len(self.ships)


  def __iter__(self):
    for ship in self.ships.values():
      yield ship


  def inOrder(self):
    return sorted(self.ships.values())


  def inCountryOwnerOrder(self):
    return sorted(self.ships.values(),
           key=lambda x: (x.country, x.owner, x.name))


  def load(self):
    exception = None
    fh = None
    try:
      if not self.filename:
        raise IOError("no filename specified for loading")
      fh = QFile(self.filename)
      if not fh.open(QIODevice.ReadOnly):
        raise IOError(str(fh.errorString()))
      stream = QDataStream(fh)
      magic = stream.readInt32()
      if magic != MAGIC_NUMBER:
        raise IOError("unrecognized file type")
      fileVersion = stream.readInt16()
      if fileVersion != FILE_VERSION:
        raise IOError("unrecognized file type version")
      self.ships = {}
      while not stream.atEnd():
        name = ""
        owner = ""
        country = ""
        description = ""
        name=stream.readQString()
        owner=stream.readQString()
        country=stream.readQString()
        description=stream.readQString()
        teu = stream.readInt32()
        ship = Ship(name, owner, country, teu, description)
        self.ships[id(ship)] = ship
        self.owners.add(str(owner))
        self.countries.add(str(country))
      self.dirty = False
    except IOError as e:
      exception = e
    finally:
      if fh is not None:
        fh.close()
      if exception is not None:
        raise exception


  def save(self):
    exception = None
    fh = None
    try:
      if not self.filename:
        raise IOError("no filename specified for saving")
      fh = QFile(self.filename)
      if not fh.open(QIODevice.WriteOnly):
        raise IOError(str(fh.errorString()))
      stream = QDataStream(fh)
      stream.writeInt32(MAGIC_NUMBER)
      stream.writeInt16(FILE_VERSION)
      stream.setVersion(QDataStream.Qt_5_7)
      for ship in self.ships.values():
        stream.writeQString(ship.name)
        stream.writeQString(ship.owner)
        stream.writeQString(ship.country)
        stream.writeQString(ship.description)
        stream.writeInt32(ship.teu)
      self.dirty = False
    except IOError as e:
      exception = e
    finally:
      if fh is not None:
        fh.close()
      if exception is not None:
        raise exception



def generateFakeShips():
  for name, owner, country, teu, description in (
("Emma M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 151687,
 "<b>W\u00E4rtsil\u00E4-Sulzer RTA96-C</b> main engine,"
 "<font color=green>109,000 hp</font>"),
("MSC Pamela", "MSC", "Liberia", 90449,
 "Draft <font color=green>15m</font>"),
("Colombo Express", "Hapag-Lloyd", "Germany", 93750,
 "Main engine, <font color=green>93,500 hp</font>"),
("Houston Express", "Norddeutsche Reederei", "Germany", 95000,
 "Features a <u>twisted leading edge full spade rudder</u>. "
 "Sister of <i>Savannah Express</i>"),
("Savannah Express", "Norddeutsche Reederei", "Germany", 95000,
 "Sister of <i>Houston Express</i>"),
("MSC Susanna", "MSC", "Liberia", 90449, ""),
("Eleonora M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 151687,
 "Captain <i>Hallam</i>"),
("Estelle M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 151687,
 "Captain <i>Wells</i>"),
("Evelyn M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 151687,
 "Captain <i>Byrne</i>"),
("Georg M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 97933, ""),
("Gerd M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 97933, ""),
("Gjertrud M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 97933, ""),
("Grete M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 97933, ""),
("Gudrun M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 97933, ""),
("Gunvor M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 97933, ""),
("CSCL Le Havre", "Danaos Shipping", "Cyprus", 107200, ""),
("CSCL Pusan", "Danaos Shipping", "Cyprus", 107200,
 "Captain <i>Watts</i>"),
("Xin Los Angeles", "China Shipping Container Lines (CSCL)",
 "Hong Kong", 107200, ""),
("Xin Shanghai", "China Shipping Container Lines (CSCL)", "Hong Kong",
 107200, ""),
("Cosco Beijing", "Costamare Shipping", "Greece", 99833, ""),
("Cosco Hellas", "Costamare Shipping", "Greece", 99833, ""),
("Cosco Guangzho", "Costamare Shipping", "Greece", 99833, ""),
("Cosco Ningbo", "Costamare Shipping", "Greece", 99833, ""),
("Cosco Yantian", "Costamare Shipping", "Greece", 99833, ""),
("CMA CGM Fidelio", "CMA CGM", "France", 99500, ""),
("CMA CGM Medea", "CMA CGM", "France", 95000, ""),
("CMA CGM Norma", "CMA CGM", "Bahamas", 95000, ""),
("CMA CGM Rigoletto", "CMA CGM", "France", 99500, ""),
("Arnold M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 93496,
 "Captain <i>Morrell</i>"),
("Anna M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 93496,
 "Captain <i>Lockhart</i>"),
("Albert M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 93496,
 "Captain <i>Tallow</i>"),
("Adrian M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 93496,
 "Captain <i>G. E. Ericson</i>"),
("Arthur M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 93496, ""),
("Axel M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 93496, ""),
("NYK Vega", "Nippon Yusen Kaisha", "Panama", 97825, ""),
("MSC Esthi", "MSC", "Liberia", 99500, ""),
("MSC Chicago", "Offen Claus-Peter", "Liberia", 90449, ""),
("MSC Bruxelles", "Offen Claus-Peter", "Liberia", 90449, ""),
("MSC Roma", "Offen Claus-Peter", "Liberia", 99500, ""),
("MSC Madeleine", "MSC", "Liberia", 107551, ""),
("MSC Ines", "MSC", "Liberia", 107551, ""),
("Hannover Bridge", "Kawasaki Kisen Kaisha", "Japan", 99500, ""),
("Charlotte M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 91690, ""),
("Clementine M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 91690, ""),
("Columbine M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 91690, ""),
("Cornelia M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 91690, ""),
("Chicago Express", "Hapag-Lloyd", "Germany", 93750, ""),
("Kyoto Express", "Hapag-Lloyd", "Germany", 93750, ""),
("Clifford M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 91690, ""),
("Sally M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 91690, ""),
("Sine M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 91690, ""),
("Skagen M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 91690, ""),
("Sofie M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 91690, ""),
("Sor\u00F8 M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 91690, ""),
("Sovereing M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 91690, ""),
("Susan M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 91690, ""),
("Svend M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 91690, ""),
("Svendborg M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 91690, ""),
("A.P. M\u00F8ller", "M\u00E6rsk Line", "Denmark", 91690,
 "Captain <i>Ferraby</i>"),
("Caroline M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 91690, ""),
("Carsten M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 91690, ""),
("Chastine M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 91690, ""),
("Cornelius M\u00E6rsk", "M\u00E6rsk Line", "Denmark", 91690, ""),
("CMA CGM Otello", "CMA CGM", "France", 91400, ""),
("CMA CGM Tosca", "CMA CGM", "France", 91400, ""),
("CMA CGM Nabucco", "CMA CGM", "France", 91400, ""),
("CMA CGM La Traviata", "CMA CGM", "France", 91400, ""),
("CSCL Europe", "Danaos Shipping", "Cyprus", 90645, ""),
("CSCL Africa", "Seaspan Container Line", "Cyprus", 90645, ""),
("CSCL America", "Danaos Shipping ", "Cyprus", 90645, ""),
("CSCL Asia", "Seaspan Container Line", "Hong Kong", 90645, ""),
("CSCL Oceania", "Seaspan Container Line", "Hong Kong", 90645,
 "Captain <i>Baker</i>"),
("M\u00E6rsk Seville", "Blue Star GmbH", "Liberia", 94724, ""),
("M\u00E6rsk Santana", "Blue Star GmbH", "Liberia", 94724, ""),
("M\u00E6rsk Sheerness", "Blue Star GmbH", "Liberia", 94724, ""),
("M\u00E6rsk Sarnia", "Blue Star GmbH", "Liberia", 94724, ""),
("M\u00E6rsk Sydney", "Blue Star GmbH", "Liberia", 94724, ""),
("MSC Heidi", "MSC", "Panama", 95000, ""),
("MSC Rania", "MSC", "Panama", 95000, ""),
("MSC Silvana", "MSC", "Panama", 95000, ""),
("M\u00E6rsk Stralsund", "Blue Star GmbH", "Liberia", 95000, ""),
("M\u00E6rsk Saigon", "Blue Star GmbH", "Liberia", 95000, ""),
("M\u00E6rsk Seoul", "Blue Star Ship Managment GmbH", "Germany",
 95000, ""),
("M\u00E6rsk Surabaya", "Offen Claus-Peter", "Germany", 98400, ""),
("CMA CGM Hugo", "NSB Niederelbe", "Germany", 90745, ""),
("CMA CGM Vivaldi", "CMA CGM", "Bahamas", 90745, ""),
("MSC Rachele", "NSB Niederelbe", "Germany", 90745, ""),
("Pacific Link", "NSB Niederelbe", "Germany", 90745, ""),
("CMA CGM Carmen", "E R Schiffahrt", "Liberia", 89800, ""),
("CMA CGM Don Carlos", "E R Schiffahrt", "Liberia", 89800, ""),
("CMA CGM Don Giovanni", "E R Schiffahrt", "Liberia", 89800, ""),
("CMA CGM Parsifal", "E R Schiffahrt", "Liberia", 89800, ""),
("Cosco China", "E R Schiffahrt", "Liberia", 91649, ""),
("Cosco Germany", "E R Schiffahrt", "Liberia", 89800, ""),
("Cosco Napoli", "E R Schiffahrt", "Liberia", 89800, ""),
("YM Unison", "Yang Ming Line", "Taiwan", 88600, ""),
("YM Utmost", "Yang Ming Line", "Taiwan", 88600, ""),
("MSC Lucy", "MSC", "Panama", 89954, ""),
("MSC Maeva", "MSC", "Panama", 89954, ""),
("MSC Rita", "MSC", "Panama", 89954, ""),
("MSC Busan", "Offen Claus-Peter", "Panama", 89954, ""),
("MSC Beijing", "Offen Claus-Peter", "Panama", 89954, ""),
("MSC Toronto", "Offen Claus-Peter", "Panama", 89954, ""),
("MSC Charleston", "Offen Claus-Peter", "Panama", 89954, ""),
("MSC Vittoria", "MSC", "Panama", 89954, ""),
("Ever Champion", "NSB Niederelbe", "Marshall Islands", 90449,
 "Captain <i>Phillips</i>"),
("Ever Charming", "NSB Niederelbe", "Marshall Islands", 90449,
 "Captain <i>Tonbridge</i>"),
("Ever Chivalry", "NSB Niederelbe", "Marshall Islands", 90449, ""),
("Ever Conquest", "NSB Niederelbe", "Marshall Islands", 90449, ""),
("Ital Contessa", "NSB Niederelbe", "Marshall Islands", 90449, ""),
("Lt Cortesia", "NSB Niederelbe", "Marshall Islands", 90449, ""),
("OOCL Asia", "OOCL", "Hong Kong", 89097, ""),
("OOCL Atlanta", "OOCL", "Hong Kong", 89000, ""),
("OOCL Europe", "OOCL", "Hong Kong", 89097, ""),
("OOCL Hamburg", "OOCL", "Marshall Islands", 89097, ""),
("OOCL Long Beach", "OOCL", "Marshall Islands", 89097, ""),
("OOCL Ningbo", "OOCL", "Marshall Islands", 89097, ""),
("OOCL Shenzhen", "OOCL", "Hong Kong", 89097, ""),
("OOCL Tianjin", "OOCL", "Marshall Islands", 89097, ""),
("OOCL Tokyo", "OOCL", "Hong Kong", 89097, "")):
    yield Ship(name, owner, country, teu, description)

/home/yrd/eric_workspace/chap14/ships_conv/ships-dict.pyw

#!/usr/bin/env python3

import sys
from PyQt5.QtCore import QFile, QTimer, Qt
from PyQt5.QtWidgets import (QApplication, QDialog, QHBoxLayout, QLabel,
    QListWidget, QListWidgetItem, QMessageBox, QPushButton,
    QSplitter, QTableWidget, QTableWidgetItem, QTreeWidget,
    QTreeWidgetItem, QVBoxLayout, QWidget)
import ships

MAC = True
try:
  from PyQt5.QtGui import qt_mac_set_native_menubar
except ImportError:
  MAC = False


class MainForm(QDialog):

  def __init__(self, parent=None):
    super(MainForm, self).__init__(parent)

    listLabel = QLabel("&List")
    self.listWidget = QListWidget()
    listLabel.setBuddy(self.listWidget)

    tableLabel = QLabel("&Table")
    self.tableWidget = QTableWidget()
    tableLabel.setBuddy(self.tableWidget)

    treeLabel = QLabel("Tre&e")
    self.treeWidget = QTreeWidget()
    treeLabel.setBuddy(self.treeWidget)

    addShipButton = QPushButton("&Add Ship")
    removeShipButton = QPushButton("&Remove Ship")
    quitButton = QPushButton("&Quit")
    if not MAC:
      addShipButton.setFocusPolicy(Qt.NoFocus)
      removeShipButton.setFocusPolicy(Qt.NoFocus)
      quitButton.setFocusPolicy(Qt.NoFocus)

    splitter = QSplitter(Qt.Horizontal)
    vbox = QVBoxLayout()
    vbox.addWidget(listLabel)
    vbox.addWidget(self.listWidget)
    widget = QWidget()
    widget.setLayout(vbox)
    splitter.addWidget(widget)
    vbox = QVBoxLayout()
    vbox.addWidget(tableLabel)
    vbox.addWidget(self.tableWidget)
    widget = QWidget()
    widget.setLayout(vbox)
    splitter.addWidget(widget)
    vbox = QVBoxLayout()
    vbox.addWidget(treeLabel)
    vbox.addWidget(self.treeWidget)
    widget = QWidget()
    widget.setLayout(vbox)
    splitter.addWidget(widget)
    buttonLayout = QHBoxLayout()
    buttonLayout.addWidget(addShipButton)
    buttonLayout.addWidget(removeShipButton)
    buttonLayout.addStretch()
    buttonLayout.addWidget(quitButton)
    layout = QVBoxLayout()
    layout.addWidget(splitter)
    layout.addLayout(buttonLayout)
    self.setLayout(layout)

    self.tableWidget.itemChanged[QTableWidgetItem].connect(self.tableItemChanged)
    addShipButton.clicked.connect(self.addShip)
    removeShipButton.clicked.connect(self.removeShip)
    quitButton.clicked.connect(self.accept)

    self.ships = ships.ShipContainer("ships.dat")
    self.setWindowTitle("Ships (dict)")
    QTimer.singleShot(0, self.initialLoad)


  def initialLoad(self):
    if not QFile.exists(self.ships.filename):
      for ship in ships.generateFakeShips():
        self.ships.addShip(ship)
      self.ships.dirty = False
    else:
      try:
        self.ships.load()
      except IOError as e:
        QMessageBox.warning(self, "Ships - Error",
            "Failed to load: {0}".format(e))
    self.populateList()
    self.populateTable()
    self.tableWidget.sortItems(0)
    self.populateTree()


  def reject(self):
    self.accept()


  def accept(self):
    if (self.ships.dirty and
      QMessageBox.question(self, "Ships - Save?",
          "Save unsaved changes?",
          QMessageBox.Yes|QMessageBox.No) ==
          QMessageBox.Yes):
      try:
        self.ships.save()
      except IOError as e:
        QMessageBox.warning(self, "Ships - Error",
            "Failed to save: {0}".format(e))
    QDialog.accept(self)


  def populateList(self, selectedShip=None):
    selected = None
    self.listWidget.clear()
    for ship in self.ships.inOrder():
      item = QListWidgetItem("{0} of {1}/{2} ({3:,})".format(ship.name,ship.owner,ship.country,int(ship.teu)))
      self.listWidget.addItem(item)
      if selectedShip is not None and selectedShip == id(ship):
        selected = item
    if selected is not None:
      selected.setSelected(True)
      self.listWidget.setCurrentItem(selected)


  def populateTable(self, selectedShip=None):
    selected = None
    self.tableWidget.clear()
    self.tableWidget.setSortingEnabled(False)
    self.tableWidget.setRowCount(len(self.ships))
    headers = ["Name", "Owner", "Country", "Description", "TEU"]
    self.tableWidget.setColumnCount(len(headers))
    self.tableWidget.setHorizontalHeaderLabels(headers)
    for row, ship in enumerate(self.ships):
      item = QTableWidgetItem(ship.name)
      item.setData(Qt.UserRole, id(ship))
      if selectedShip is not None and selectedShip == id(ship):
        selected = item
      self.tableWidget.setItem(row, ships.NAME, item)
      self.tableWidget.setItem(row, ships.OWNER,
          QTableWidgetItem(ship.owner))
      self.tableWidget.setItem(row, ships.COUNTRY,
          QTableWidgetItem(ship.country))
      self.tableWidget.setItem(row, ships.DESCRIPTION,
          QTableWidgetItem(ship.description))
      item = QTableWidgetItem("{0:>8}".format(ship.teu))
      item.setTextAlignment(Qt.AlignRight|Qt.AlignVCenter)
      self.tableWidget.setItem(row, ships.TEU, item)
    self.tableWidget.setSortingEnabled(True)
    self.tableWidget.resizeColumnsToContents()
    if selected is not None:
      selected.setSelected(True)
      self.tableWidget.setCurrentItem(selected)


  def populateTree(self, selectedShip=None):
    selected = None
    self.treeWidget.clear()
    self.treeWidget.setColumnCount(2)
    self.treeWidget.setHeaderLabels(["Country/Owner/Name", "TEU"])
    self.treeWidget.setItemsExpandable(True)
    parentFromCountry = {}
    parentFromCountryOwner = {}
    for ship in self.ships.inCountryOwnerOrder():
      ancestor = parentFromCountry.get(ship.country)
      if ancestor is None:
        ancestor = QTreeWidgetItem(self.treeWidget, [ship.country])
        parentFromCountry[ship.country] = ancestor
      countryowner = ship.country + "/" + ship.owner
      parent = parentFromCountryOwner.get(countryowner)
      if parent is None:
        parent = QTreeWidgetItem(ancestor, [ship.owner])
        parentFromCountryOwner[countryowner] = parent
      item = QTreeWidgetItem(parent, [ship.name,"{0}".format(ship.teu)])
      item.setTextAlignment(1, Qt.AlignRight|Qt.AlignVCenter)
      if selectedShip is not None and selectedShip == id(ship):
        selected = item
      self.treeWidget.expandItem(parent)
      self.treeWidget.expandItem(ancestor)
    self.treeWidget.resizeColumnToContents(0)
    self.treeWidget.resizeColumnToContents(1)
    if selected is not None:
      selected.setSelected(True)
      self.treeWidget.setCurrentItem(selected)
    print(parentFromCountry)
    print(parentFromCountryOwner)


  def addShip(self):
    ship = ships.Ship(" Unknown", " Unknown", " Unknown")
    self.ships.addShip(ship)
    self.populateList()
    self.populateTree()
    self.populateTable(id(ship))
    self.tableWidget.setFocus()
    self.tableWidget.editItem(self.tableWidget.currentItem())


  def tableItemChanged(self, item):
    ship = self.currentTableShip()
    if ship is None:
      return
    column = self.tableWidget.currentColumn()
    if column == ships.NAME:
      ship.name = item.text().strip()
    elif column == ships.OWNER:
      ship.owner = item.text().strip()
    elif column == ships.COUNTRY:
      ship.country = item.text().strip()
    elif column == ships.DESCRIPTION:
      ship.description = item.text().strip()
    elif column == ships.TEU:
      ship.teu = item.text()
    self.ships.dirty = True
    self.populateList()
    self.populateTree()


  def currentTableShip(self):
    item = self.tableWidget.item(self.tableWidget.currentRow(), 0)
    if item is None:
      return None
    return self.ships.ship(
        item.data(Qt.UserRole))


  def removeShip(self):
    ship = self.currentTableShip()
    if ship is None:
      return
    if (QMessageBox.question(self, "Ships - Remove",
        "Remove {0} of {1}/{2}?".format(ship.name,ship.owner,ship.country),
        QMessageBox.Yes|QMessageBox.No) ==
        QMessageBox.No):
      return
    self.ships.removeShip(ship)
    self.populateList()
    self.populateTree()
    self.populateTable()


app = QApplication(sys.argv)
form = MainForm()
form.show()
app.exec_()

运行结果:

以上这篇python3+PyQt5 使用三种不同的简便项窗口部件显示数据的方法就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持脚本之家。

相关文章

  • Django 内置权限扩展案例详解

    Django 内置权限扩展案例详解

    这篇文章主要介绍了Django 内置权限扩展案例详解,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友们下面随着小编来一起学习学习吧
    2019-03-03
  • Pandas数据清洗的实现

    Pandas数据清洗的实现

    在处理数据的时候,需要对数据进行一个清洗过程,本文就来介绍一下Pandas数据清洗的实现,具有一定的参考价值,感兴趣的可以了解一下
    2023-11-11
  • Python中使用OpenCV库来进行简单的气象学遥感影像计算

    Python中使用OpenCV库来进行简单的气象学遥感影像计算

    这篇文章主要介绍了Python中使用OpenCV库来进行简单的气象学图像计算的例子,文中是用来进行光谱辐射定标、大气校正和计算反射率,需要的朋友可以参考下
    2016-02-02
  • Windows下Anaconda安装、换源与更新的方法

    Windows下Anaconda安装、换源与更新的方法

    这篇文章主要介绍了Windows下Anaconda安装、换源与更新的方法,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友们下面随着小编来一起学习学习吧
    2020-04-04
  • python3实现raspberry pi(树莓派)4驱小车控制程序

    python3实现raspberry pi(树莓派)4驱小车控制程序

    这篇文章主要为大家详细介绍了python3实现raspberry pi(树莓派)4驱小车控制程序,文中示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
    2020-02-02
  • Python 实现遥感影像波段组合的示例代码

    Python 实现遥感影像波段组合的示例代码

    这篇文章主要介绍了Python 实现遥感影像波段组合的示例代码,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友们下面随着小编来一起学习学习吧
    2019-08-08
  • Python使用PEfile模块实现分析PE文件

    Python使用PEfile模块实现分析PE文件

    PeFile模块是Python中一个强大的便携式第三方PE格式分析工具,用于解析和处理Windows可执行文件,本文主要就来讲讲如何使用PEfile模块实现分析PE文件,需要的可以参考下
    2023-08-08
  • 通过Python将MP4视频转换为GIF动画

    通过Python将MP4视频转换为GIF动画

    Python可用于读取常见的MP4视频格式并将其转换为GIF动画。本文将详细为大家介绍实现的过程,文中的代码具有一定的参考价值,感兴趣的小伙伴可以学习一下
    2021-12-12
  • python自定义函数实现最大值的输出方法

    python自定义函数实现最大值的输出方法

    今天小编就为大家分享一篇python自定义函数实现最大值的输出方法,具有很好的参考价值,希望对大家有所帮助。一起跟随小编过来看看吧
    2019-07-07
  • Python实现子类调用父类的方法

    Python实现子类调用父类的方法

    这篇文章主要介绍了Python实现子类调用父类的方法,解决子类覆盖父类初始化方法而出现的不确定问题,可通过调用超类构造方法的未绑定版本或者使用super函数来解决,需要的朋友可以参考下
    2014-11-11

最新评论