Question

我在返回函数时遇到了一些麻烦。我想创建一个Nuke脚本，询问用户一个目录，并在写入节点中使用当前日期，小时等自动设置该目录的路径。这部分非常简单（这是DateWrite()函数提供的代码）

现在，我想在渲染完成后打开这个目录。所以我必须使用Callbacks并调用一个打开给定目录的函数。

这是我遇到麻烦的地方：因为目录是在第一个函数中设置的，所以我试图用return来获取这个函数的值。

它有效，但它强迫我使用第一个函数两次（这部分是openDirectoryAfterRender()函数）

#Modules import
import nuke
import subprocess

# Create DateWrite function
def DateWrite():

    # Create Variables
    selectedNodes = nuke.selectedNodes() # Get Selection of all selected nodes

    if len(selectedNodes) == 1:
        filePath = nuke.getFilename('Set Output Directory') # Asks the user to set an OutPut directory for the Write Node

        writeNode = nuke.createNode("Write") # Create a Write Node
        writeNode['file'].setValue(filePath + "[file rootname [file tail [value root.name]]]_[date %y][date %m][date %d]_[date %H][date %M].png") # Set the Write Node with TCL
        writeNode['afterRender'].setValue('openDirectoryAfterRender()') # Add a callback which will call the function openDirectoryAfterRender()

    else:
        nuke.message("No node selected or more than one node are selected.\nPlease select only one node.")
    return filePath

# Create openDirectoryAfterRender
def openDirectoryAfterRender():
    directoryToOpen = DateWrite() # Get the returned directory from DateWrite() -but also execute DateWrite another time-
    directoryToOpen = directoryToOpen.replace('/','\\') # Replace the slashes with backslashes

    subprocess.Popen('explorer %s' % directoryToOpen) # Open the chosen directory

我对Python和代码一般都是新手，所以这可能是一个noob问题。我尝试了很多不同的解决方案，这是我能从我想要的最接近的解决方案。

非常感谢！

Answer 1

我觉得你对回调感到困惑。您应该从另一个函数或外部函数调用DataWrite。这是您的代码的更新版本，并在nuke中进行测试，它可以正常工作

import nuke
import subprocess

# Create DateWrite function
def DateWrite():

    # Create Variables
    selectedNodes = nuke.selectedNodes() # Get Selection of all selected nodes

    if len(selectedNodes) == 1:
        filePath = nuke.getFilename('Set Output Directory') # Asks the user to set an OutPut directory for the Write Node

        writeNode = nuke.createNode("Write") # Create a Write Node
        writeNode['file'].setValue(filePath + "[file rootname [file tail [value root.name]]]_[date %y][date %m][date %d]_[date %H][date %M].png") # Set the Write Node with TCL
        writeNode['afterRender'].setValue('openDirectoryAfterRender(%s)' % filePath) # Add a callback which will call the function openDirectoryAfterRender()

    else:
        nuke.message("No node selected or more than one node are selected.\nPlease select only one node.")

# Create openDirectoryAfterRender
def openDirectoryAfterRender(directoryToOpen):
    directoryToOpen = directoryToOpen.replace('/','\\') # Replace the slashes with backslashes

    subprocess.Popen('explorer %s' % directoryToOpen) # Open the chosen directory

directoryToOpen = DateWrite() # Get the returned directory from DateWrite() -but also execute DateWrite another time-

Python Nuke - 如何使用来自另一个函数的变量结果

1 个答案: