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@mrocklin
Created July 13, 2019 16:46
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{
"cells": [
{
"cell_type": "code",
"execution_count": 1,
"metadata": {},
"outputs": [],
"source": [
"import threading\n",
"\n",
"class MyClass:\n",
" def __init__(self, x):\n",
" self.lock = threading.Lock()\n",
" self.x = x\n",
" \n",
" def __repr__(self):\n",
" return \"<MyClass: %s>\" % self.x"
]
},
{
"cell_type": "code",
"execution_count": 2,
"metadata": {},
"outputs": [
{
"data": {
"text/plain": [
"<MyClass: 123>"
]
},
"execution_count": 2,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"import pickle\n",
"\n",
"obj = MyClass(123)\n",
"obj"
]
},
{
"cell_type": "code",
"execution_count": 3,
"metadata": {},
"outputs": [
{
"ename": "TypeError",
"evalue": "can't pickle _thread.lock objects",
"output_type": "error",
"traceback": [
"\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
"\u001b[0;31mTypeError\u001b[0m Traceback (most recent call last)",
"\u001b[0;32m<ipython-input-3-9170076bb054>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mpickle\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mdumps\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mobj\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
"\u001b[0;31mTypeError\u001b[0m: can't pickle _thread.lock objects"
]
}
],
"source": [
"pickle.dumps(obj)"
]
},
{
"cell_type": "code",
"execution_count": 4,
"metadata": {},
"outputs": [],
"source": [
"class MyClass:\n",
" def __init__(self, x):\n",
" self.lock = threading.Lock()\n",
" self.x = x\n",
" \n",
" def __getstate__(self):\n",
" return (self.x,)\n",
" \n",
" def __setstate__(self, state):\n",
" self.lock = threading.Lock()\n",
" self.x = state[0]\n",
" \n",
" def __repr__(self):\n",
" return \"<MyClass: %s>\" % self.x"
]
},
{
"cell_type": "code",
"execution_count": 5,
"metadata": {},
"outputs": [
{
"data": {
"text/plain": [
"<MyClass: 123>"
]
},
"execution_count": 5,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"obj = MyClass(123)\n",
"obj"
]
},
{
"cell_type": "code",
"execution_count": 6,
"metadata": {},
"outputs": [
{
"data": {
"text/plain": [
"b'\\x80\\x03c__main__\\nMyClass\\nq\\x00)\\x81q\\x01K{\\x85q\\x02b.'"
]
},
"execution_count": 6,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"pickle.dumps(obj)"
]
},
{
"cell_type": "code",
"execution_count": 7,
"metadata": {},
"outputs": [
{
"data": {
"text/plain": [
"<MyClass: 123>"
]
},
"execution_count": 7,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"pickle.loads(_)"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.7.1"
}
},
"nbformat": 4,
"nbformat_minor": 2
}
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