from maya import mel

mel.eval("FBXResetExport")  # Reset options.
mel.eval("FBXProperty Export|IncludeGrp|Animation -v true")
mel.eval("FBXProperty Export|IncludeGrp|Animation|ExtraGrp|RemoveSingleKey -v true")
mel.eval("FBXProperty Export|IncludeGrp|CameraGrp|Camera -v false")

mel.eval('FBXExport -f "C:/outfile.fbx" -s')  # '-s' for selected.

from mayafbx import FbxExportOptions, export_fbx

options = FbxExportOptions()
options.animation = True
options.remove_single_key = True
options.cameras = True
options.selected = True

export_fbx("C:/outfile.fbx", options)

from mayafbx import FbxExportOptions, export_fbx

options = FbxExportOptions(
    animation=True,
    remove_single_key=True,
    cameras=True,
    selected=True)

export_fbx("C:/outfile.fbx", options)

import tempfile, os
from maya import cmds
from mayafbx import FbxExportOptions, export_fbx
from mayafbx import FbxImportOptions, import_fbx, MergeMode

cmds.file(new=True, force=True)

# Create a cube with 2 keyframes.
cube = cmds.polyCube()[0]
cmds.setKeyframe(cube, attribute="translateX", time=1, value=0)
cmds.setKeyframe(cube, attribute="translateX", time=24, value=10)

# Setup options to export the scene with baked animation.
options = FbxExportOptions()
options.animation = True
options.bake_animation = True
options.bake_resample_all = True

# Export the scene as FBX.
filepath = os.path.join(tempfile.gettempdir(), "testcube.fbx")
export_fbx(filepath, options)

# Remove all keys from our cube.
cmds.cutKey(cube, attribute="translateX", option="keys")

# Setup options to import our animation back on our cube.
options = FbxImportOptions()
options.merge_mode = MergeMode.kMerge
options.animation = True

# Import our FBX.
import_fbx(filepath, options)