如何将字符串转换为浮点值

Question

我有这个脚本，我想根据用户选择复制动画并粘贴回偏移量。对于偏移量，我想使用用户的输入值，但我在字符串中出现错误以浮动，有人可以帮我解决这个问题吗？ 提前致谢

import maya.cmds as cmds

# Get the first selection
sel = cmds.ls(sl=True)[0]

# Get the animation curves from the first selection
animCurves = cmds.listConnections(sel, type='animCurve')

# Get the time range of the animation curves
startTime = cmds.findKeyframe(animCurves[0], which='first')
endTime = cmds.findKeyframe(animCurves[0], which='last')

# Get the offset value from user input
offset = float(cmds.promptDialog(title='Offset', message='Enter offset value:', button=['OK', 'Cancel'], defaultButton='OK', cancelButton='Cancel', dismissString='Cancel'))

# Loop through all other selections and paste animation with offset
for obj in cmds.ls(sl=True)[1:]:
    cmds.copyKey(sel, time=(startTime, endTime))
    cmds.pasteKey(obj, time=(startTime + offset, endTime + offset))