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new_types.ipynb
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{ | |
"cells": [ | |
{ | |
"cell_type": "code", | |
"execution_count": 1, | |
"metadata": {}, | |
"outputs": [ | |
{ | |
"data": { | |
"text/plain": [ | |
"Student(name='Tommy Johnson', address='Main street', age=22, sex='M')" | |
] | |
}, | |
"execution_count": 1, | |
"metadata": {}, | |
"output_type": "execute_result" | |
} | |
], | |
"source": [ | |
"from typing import NamedTuple\n", | |
"\n", | |
"class Student(NamedTuple):\n", | |
" name: str\n", | |
" address: str\n", | |
" age: int\n", | |
" sex: str\n", | |
" \n", | |
"tommy = Student(name='Tommy Johnson', address='Main street', age=22, sex='M')\n", | |
"tommy" | |
] | |
}, | |
{ | |
"cell_type": "code", | |
"execution_count": 2, | |
"metadata": {}, | |
"outputs": [ | |
{ | |
"name": "stdout", | |
"output_type": "stream", | |
"text": [ | |
"True\n" | |
] | |
}, | |
{ | |
"data": { | |
"text/plain": [ | |
"'Tommy Johnson'" | |
] | |
}, | |
"execution_count": 2, | |
"metadata": {}, | |
"output_type": "execute_result" | |
} | |
], | |
"source": [ | |
"print(isinstance(tommy, tuple))\n", | |
"tommy[0]" | |
] | |
}, | |
{ | |
"cell_type": "code", | |
"execution_count": 3, | |
"metadata": {}, | |
"outputs": [ | |
{ | |
"ename": "TypeError", | |
"evalue": "__new__() missing 1 required positional argument: 'sex'", | |
"output_type": "error", | |
"traceback": [ | |
"\u001b[1;31m---------------------------------------------------------------------------\u001b[0m", | |
"\u001b[1;31mTypeError\u001b[0m Traceback (most recent call last)", | |
"\u001b[1;32m<ipython-input-3-c36c04942fdd>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[0;32m 2\u001b[0m \u001b[0msex\u001b[0m\u001b[1;33m:\u001b[0m \u001b[0mstr\u001b[0m \u001b[1;33m=\u001b[0m \u001b[1;34m'M'\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m 3\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 4\u001b[1;33m \u001b[0mMaleStudent\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mname\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;34m'Tommy Johnson'\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0maddress\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;34m'Main Street'\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mage\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;36m22\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m", | |
"\u001b[1;31mTypeError\u001b[0m: __new__() missing 1 required positional argument: 'sex'" | |
] | |
} | |
], | |
"source": [ | |
"class MaleStudent(Student):\n", | |
" sex: str = 'M'\n", | |
" \n", | |
"MaleStudent(name='Tommy Johnson', address='Main Street', age=22)" | |
] | |
} | |
], | |
"metadata": { | |
"kernelspec": { | |
"display_name": "Python [conda env:tea_facts]", | |
"language": "python", | |
"name": "conda-env-tea_facts-py" | |
}, | |
"language_info": { | |
"codemirror_mode": { | |
"name": "ipython", | |
"version": 3 | |
}, | |
"file_extension": ".py", | |
"mimetype": "text/x-python", | |
"name": "python", | |
"nbconvert_exporter": "python", | |
"pygments_lexer": "ipython3", | |
"version": "3.6.4" | |
} | |
}, | |
"nbformat": 4, | |
"nbformat_minor": 2 | |
} |
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