这段代码的目的是使用 QPushButton 创建一个按钮，然后使用 Pyfluidsynth 库创建一个声音。我已经导入了 time 和 pyfluidsynth，但我也尝试导入了 fluidsynth（该选项在那里，但我不知道有什么区别，两者都与我安装的一个库一起提供）。这是代码：
import sys
import time
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton
from PyQt5.QtGui import QIcon
from PyQt5.QtCore import pyqtSlot
import pyfluidsynth
class App(QWidget):
def __init__(self):
super().__init__()
self.title = 'PyQt5 button - pythonspot.com'
self.left = 10
self.top = 10
self.width = 320
self.height = 200
self.initUI()
def initUI(self):
self.setWindowTitle(self.title)
self.setGeometry(self.left, self.top, self.width, self.height)
button = QPushButton('PyQt5 button', self)
button.setToolTip('This is an example button')
button.move(100, 70)
button.clicked.connect(self.PlayNote)
self.show()
def PlayNote(self):
fs = pyfluidsynth.Synth()
fs.start()
sfid = fs.sfload("acoustic_grand_piano_ydp_20080910.sf2")
fs.program_select(0, sfid, 0, 0)
fs.noteon(0, 60, 30)
time.sleep(1.0)
fs.delete()
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = App()
sys.exit(app.exec_())
但是，运行时，结果是 ImportError：
Traceback (most recent call last):
File "/Volumes/T7/MIDI Project/MIDI calculation.py", line 6, in <module>
import pyfluidsynth
File "/Users/ricochetnkweso/Library/Python/3.7/lib/python/site-packages/pyfluidsynth.py", line 43, in <module>
raise ImportError("Couldn't find the FluidSynth library.")
ImportError: Couldn't find the FluidSynth library.