An interface Downloader is implemented through Pyqt5 to download various types of pictures through network request. You can enter the keywords of different pictures on the interface to download the pictures and save the downloaded pictures to the user-defined file path.
The source code and operation video are attached at the end of the paper
Before introducing the code block, let's take a look at the three-party python libraries that need to be used.
from PyQt5.QtWidgets import * from PyQt5.QtCore import * from PyQt5.QtGui import * import os from scripy_images import ScripyImages
The three modules imported from Pyqt5 have been mentioned in the introduction of the weather query system before. If you need to download the source code of Pyqt5 weather query system, please reply in the official account: "weather query system". The remaining two operation libraries are os module, which is mainly used for system file related operations, and scripy_ The images module is used to obtain and download images through network requests.
Next, we introduce the use of Pyqt5 related page definitions and other functions. Similarly, first add the required components on the Pyqt5 window, and finally add these components to the layout. The general implementation process follows this order.
def init_ui(self):
self.setWindowTitle('Baidu image extraction application')
grid = QGridLayout()
self.page_label = QLabel()
self.page_label.setText('Set the number of pages to crawl:')
self.page_line_text = QLineEdit()
self.page_line_text.setPlaceholderText('Enter integer')
self.page_line_text.setValidator(QIntValidator(1, 99))
self.page_line_text.setFocus()
self.keyword_label = QLabel()
self.keyword_label.setText('Set diagram Keywords:')
self.keyword_line_text = QLineEdit()
self.keyword_line_text.setValidator(QRegExpValidator(QRegExp('[\u4E00-\u9FA5]+')))
self.keyword_line_text.setMaxLength(6)
self.keyword_line_text.setPlaceholderText('Input Chinese characters')
self.file_path = QLineEdit()
self.file_path.setPlaceholderText('Custom file path')
self.file_path.setReadOnly(True)
self.file_path_button = QPushButton()
self.file_path_button.setText('Custom path')
self.file_path_button.clicked.connect(self.file_path_click)
self.request_button = QPushButton()
self.request_button.setText('Quickly start capturing pictures')
self.request_button.clicked.connect(self.download_image)
self.log_text = QTextEdit()
self.log_text.setPlaceholderText('Capture progress result display...')
self.log_text.setReadOnly(True)
self.log_text.setMaximumHeight(100)
self.version_msg_label = QLabel()
self.version_msg_label.setText('<font color=blue>Official account:[Python concentration camp] release</font>')
self.version_msg_label.setAlignment(Qt.AlignCenter)
grid.addWidget(self.page_label, 0, 0, 1, 1)
grid.addWidget(self.page_line_text, 0, 1, 1, 2)
grid.addWidget(self.keyword_label, 1, 0, 1, 1)
grid.addWidget(self.keyword_line_text, 1, 1, 1, 2)
grid.addWidget(self.file_path, 2, 0, 1, 2)
grid.addWidget(self.file_path_button, 2, 2, 1, 1)
grid.addWidget(self.request_button, 3, 0, 1, 3)
grid.addWidget(self.log_text, 4, 0, 1, 3)
grid.addWidget(self.version_msg_label, 5, 0, 1, 3)
self.setLayout(grid)Then, define the corresponding slot function. One of the two slot functions is to actually define the storage path of the file. When you need a slot function to obtain the file path. Another is to start the download process of Baidu pictures, and call the execution of the download module through this slot function.
def file_path_click(self):
self.cwd = os.getcwd()
directory = QFileDialog.getExistingDirectory(self, 'Select Folder', self.cwd)
print(directory)
self.file_path.setText(directory + '/')
def download_image(self):
check_param = False
self.log_text.setText("")
self.log_text.insertPlainText("-----Start mandatory parameter check-----\n")
if self.page_line_text.text().strip() != '' and \
self.keyword_line_text.text().strip() != '' and \
self.file_path.text().strip() != '':
self.log_text.insertPlainText("---Parameter check succeeded---\n")
check_param = True
else:
self.log_text.insertPlainText("---Parameter check failed---\n")
self.log_text.insertPlainText("Please fill in the required fields before continuing...\n")
check_param = False
self.log_text.insertPlainText("-----End mandatory parameter check-----\n")
if check_param is True:
self.log_text.insertPlainText("-----Start downloading Baidu pictures-----\n")
self.log_text.insertPlainText("---Please wait patiently---\n")
ScripyImages(page_num=self.page_line_text.text(),current=self.keyword_line_text.text(),file_path=self.file_path.text())
self.log_text.insertPlainText("-----End downloading Baidu pictures-----\n")Then it calls the main function to execute the whole logic.
if __name__ == '__main__':
app = QApplication(sys.argv)
baidu = baiduImage()
baidu.show()
sys.exit(app.exec_())The whole Pyqt5 calls execution process is like this, get the complete block of code, including the Baidu picture execution network request download part, in the official account reply to Baidu image download device to get the complete code block.
Operation video demonstration
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