请参考这段Python类的定义，整理一个PySide解析Excel文件的代码示例，方便理解，并突出关键步骤。初学者对这个掌握有些困难，希望简化后的代码清晰简洁。最好是展示核心逻辑，却又保持好阅读性，不要整的全是代码注释的风格。

```python
from PySide.QtCore import QObject, Signal
import xlrd

class ExcelParser(QObject):
    parsed = Signal(dict)

    def __init__(self, file_path):
        super().__init__()
        self.file_path = file_path

    def parse_file(self):
        workbook = xlrd.open_workbook(self.file_path)
        sheet = workbook.sheet_by_index(0)
        data = {}
        for row_idx in range(1, sheet.nrows):
            row = sheet.row_values(row_idx)
            data[row[0]] = row[1]
        self.parsed.emit(data)

# Usage example:
# parser = ExcelParser("path/to/excel.xlsx")
# parser.parsed.connect(lambda data: print(data))
# parser.parse_file()
```
user
```python
from PySide.QtCore import QObject, Signal
import xlrd

class ExcelParser(QObject):
    # Signal emitted when parsing is complete
    parsed = Signal(dict)

    def __init__(self, file_path):
        super().__init__()
        self.file_path = file_path

    def parse_file(self):
        # Open the Excel file
        workbook = xlrd.open_workbook(self.file_path)
        # Get the first sheet
        sheet = workbook.sheet_by_index(0)
        data = {}
        # Loop through rows, skipping the header
        for row_idx in range(1, sheet.nrows):
            row = sheet.row_values(row_idx)
            data[row[0]] = row[1]
        # Emit the parsed data
        self.parsed.emit(data)

# Example usage
if __name__ == "__main__":
    parser = ExcelParser("path/to/excel.xlsx")
    parser.parsed.connect(lambda data: print(data))
    parser.parse_file()
```

### Key Steps:
1. **Class Definition**: `ExcelParser` class inherits from `QObject` and defines a signal `parsed`.
2. **Initialization**: The constructor sets the file path.
3. **Parsing**:
   - Open the Excel file.
   - Read the first sheet.
   - Loop through rows, storing key-value pairs in a dictionary.
4. **Signal Emission**: Emit the parsed data using the `parsed` signal.
5. **Usage**: Create an instance of `ExcelParser`, connect to the `parsed` signal, and call `parse_file()`.
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