在使用 PyQt 解析 Python 文件并生成指令按钮时，可以通过读取 Python 文件中的函数或类定义来动态生成按钮，并将这些按钮以固定宽度排列，同时支持根据界面宽度自动换行。以下是实现该功能的关键步骤和示例代码。 ### 动态解析 Python 文件生成按钮 可以通过 `inspect` 模块解析 Python 文件中的函数或类定义。读取文件后，提取其中的函数名或类名，并为每个名称创建一个按钮。将这些按钮添加到一个可自动换行的布局中。 ```python import os import importlib.util import inspect from PyQt5.QtWidgets import QWidget, QPushButton, QVBoxLayout, QScrollArea, QFlowLayout from PyQt5.QtCore import Qt class FunctionButtonGenerator(QWidget): def __init__(self, file_path): super().__init__() self.file_path = file_path self.init_ui() def init_ui(self): main_layout = QVBoxLayout(self) scroll_area = QScrollArea() scroll_area.setWidgetResizable(True) content_widget = QWidget() self.flow_layout = QFlowLayout(content_widget) scroll_area.setWidget(content_widget) main_layout.addWidget(scroll_area) self.load_functions() def load_functions(self): module_name = os.path.splitext(os.path.basename(self.file_path))[0] spec = importlib.util.spec_from_file_location(module_name, self.file_path) module = importlib.util.module_from_spec(spec) spec.loader.exec_module(module) for name, obj in inspect.getmembers(module): if inspect.isfunction(obj) and obj.__module__ == module_name: button = QPushButton(name) button.setFixedWidth(120) # 固定按钮宽度 button.clicked.connect(lambda _, func=obj: self.execute_function(func)) self.flow_layout.addWidget(button) def execute_function(self, func): try: result = func() print("Function returned:", result) except Exception as e: print("Error executing function:", e) ``` ### 实现自动换行布局 PyQt 并没有内置的 `FlowLayout`，但可以通过自定义布局类实现类似效果。以下是 `QFlowLayout` 的实现： ```python from PyQt5.QtWidgets import QLayout, QWidgetItem, QWidget from PyQt5.QtCore import Qt, QRect, QSize class QFlowLayout(QLayout): def __init__(self, parent=None, margin=0, spacing=-1): super().__init__(parent) if parent is not None: self.setContentsMargins(margin, margin, margin, margin) self.setSpacing(spacing) self.item_list = [] def __del__(self): item = self.takeAt(0) while item: item = self.takeAt(0) def addItem(self, item): self.item_list.append(item) def count(self): return len(self.item_list) def itemAt(self, index): if 0 <= index < len(self.item_list): return self.item_list[index] return None def takeAt(self, index): if 0 <= index < len(self.item_list): return self.item_list.pop(index) return None def hasHeightForWidth(self): return True def heightForWidth(self, width): height = self.do_layout(QRect(0, 0, width, 0), True) return height def setGeometry(self, rect): super().setGeometry(rect) self.do_layout(rect, False) def sizeHint(self): return self.minimumSize() def minimumSize(self): size = QSize() for item in self.item_list: size = size.expandedTo(item.minimumSize()) margin = self.contentsMargins() size += QSize(margin.left() + margin.right(), margin.top() + margin.bottom()) return size def do_layout(self, rect, test_only): x = rect.x() y = rect.y() line_height = 0 for item in self.item_list: wid = item.widget() space_x = self.spacing() space_y = self.spacing() next_x = x + item.sizeHint().width() + space_x if next_x - space_x > rect.right() and line_height > 0: x = rect.x() y += line_height + space_y line_height = 0 if not test_only: item.setGeometry(QRect(QPoint(x, y), item.sizeHint())) x += item.sizeHint().width() + space_x line_height = max(line_height, item.sizeHint().height()) return y + line_height - rect.y() ``` ### 使用示例 在主窗口中调用 `FunctionButtonGenerator`，传入 Python 文件路径即可： ```python from PyQt5.QtWidgets import QApplication, QMainWindow if __name__ == "__main__": import sys app = QApplication(sys.argv) window = QMainWindow() generator = FunctionButtonGenerator("example.py") # 替换为你的Python文件路径 window.setCentralWidget(generator) window.resize(600, 400) window.show() sys.exit(app.exec_()) ``` ###