pyqt5 用jedi实现pythonIDE

使用Jedi可以实现Python的智能代码补全、函数跳转、代码重构等功能，结合PyQt5可以实现一个简单的Python IDE。下面是一个简单的示例：

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QTextEdit
from PyQt5.QtGui import QTextCursor
import jedi

class MainWindow(QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        self.text_edit = QTextEdit(self)
        self.text_edit.cursorPositionChanged.connect(self.on_cursor_position_changed)
        self.setCentralWidget(self.text_edit)
        self.jedi_script = jedi.Script('', 1, 1, '')
        
    def on_cursor_position_changed(self):
        cursor = self.text_edit.textCursor()
        line_number = cursor.blockNumber() + 1
        column_number = cursor.columnNumber()
        source_code = self.text_edit.toPlainText()
        self.jedi_script = jedi.Script(source_code, line_number, column_number, '')
        completions = self.jedi_script.completions()
        if completions:
            self.show_completions(completions)
        else:
            self.text_edit.clear()

    def show_completions(self, completions):
        cursor = self.text_edit.textCursor()
        cursor.movePosition(QTextCursor.StartOfWord)
        cursor.movePosition(QTextCursor.EndOfWord, QTextCursor.KeepAnchor)
        word_under_cursor = cursor.selectedText()
        completion_list = [c.name for c in completions if c.name.startswith(word_under_cursor)]
        self.text_edit.clear()
        self.text_edit.insertPlainText('\n'.join(completion_list))

if __name__ == '__main__':
    app = QApplication(sys.argv)
    main_window = MainWindow()
    main_window.show()
    sys.exit(app.exec_())

这个例子中，我们使用QTextEdit作为文本编辑器，利用jedi实现了在光标所在位置的代码自动补全功能。当光标位置改变时，我们先利用QTextEdit的textCursor方法获取光标位置，然后获取所在行、列的信息和整个代码，再使用jedi的Script类生成一个脚本对象，最后调用completions方法获取自动补全列表。我们将自动补全列表显示在QTextEdit中，方便用户选择。