You have a bug in your code. "attr_data" is being initialized once at the
start of your function, and then you update it during each loop and assign
it to your "all_data" dict. But I believe you are thinking that each time
you assign it, that it is automatically doing a deep copy for you. This is
not the case. You are assigning a reference to the same dictionary each
time, and basically overwriting it on each loop (which is overwritting the
reference to that same dictionary in your "all_data"
Change it from this:
def export_keyframe(sel):
attr_data = {}
...
To this:
def export_keyframe(sel):
...
for time in range(start_frame , (end_frame + 1)):
attr_data = {}
...
Justin
On Tue, Dec 20, 2016 at 1:47 PM likage <[email protected]> wrote:
> Hi all, I am trying to export out the animation keyframes of some of the
> channel attributes of objects.
> While my code does works, however it is not exporting out the whole range
> (I am exporting them based on the time slider values).
>
> import maya.cmds as cmds
> import json
> # Specify your directory..
> file_export_dir = 'C:\Users\abc\Desktop\export_test.txt'
>
> all_data = {}
> attributes = ['translateX', 'translateY', 'translateZ', 'rotateX',
> 'rotateY', 'rotateZ']
>
> def get_frame_range():
> # get the frame range in the time slider
> start_frame = int(cmds.playbackOptions(query=True, min=True))
> end_frame = int(cmds.playbackOptions(query=True, max=True))
> return(start_frame, end_frame)
>
> def export_keyframe(sel):
> attr_data = {}
> (start_frame, end_frame) = get_frame_range()
>
> for time in range(start_frame , (end_frame + 1)):
> #>>> print "Frames iteration : ", time
> cmds.currentTime(time)
> # Get the value in each attribute
> attr_data['frame'] = str(time)
> for attribute in attributes:
> attr_value = cmds.getAttr( sel + '.' + attribute)
> # Assign the value into the dict
> attr_data[attribute] = str(attr_value)
> # Store the data into the main
> all_data[sel] = attr_data
> # Write the overall data into file
> with open(file_export_dir, 'w') as outfile:
> outfile.write(json.dumps(all_data, indent=4, sort_keys=True))
>
>
> def main():
> sels = cmds.ls(sl=True, l=True)
> if not len(sels):
> cmds.warning('Nothing is selected!')
>
> # Create the key and assign an empty value
> all_data[str(sel)] = None
> export_keyframe(sel)
>
> I am using nested dictionaries to store my data, where dict `attr_data`
> will stores the frame number and the values of the channel attributes, then
> this dict will then later be 'added' as a value to the dict `all_data`
> In the text file, te results will be displayed as:
> {
> "|locator2": {
> "frame": "5",
> "rotateX": "2.0",
> "rotateY": "2.0",
> "rotateZ": "2.0",
> "translateX": "2.5",
> "translateY": "2.5",
> "translateZ": "2.5"
> }
> }
>
> In this text file of mine, as I mentioned earlier that it works, it is
> only exporting out the values of the last frame as determined in the time
> slider. If I replaced `attr_data` from dict to list, I will then be able to
> get all the attribute, names and frames exported correctly however, it will
> be in the form of '<attribute name> <attribute value> <frame number> \n'
>
> I used dictionary thinking that it will be easier for me to get the values
> easily and if there is a need for me to debug, it will be easier to see too
> (the list method I had, simply prints all out with no indentation)
>
> How can I improve this code of mine?
>
> To test the code, simply create a locator, set the time slider to '1' to
> '5', add in some keyframes in the attributes - namely the translate and
> rotate attributes..
>
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