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a is b oddity explained

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rasbt 2014-04-15 14:18:42 -04:00
parent 96f7d72972
commit ff938c4ac7
2 changed files with 15 additions and 9 deletions
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14
.ipynb_checkpoints/not_so_obvious_python_stuff-checkpoint.ipynb
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@ -1,7 +1,7 @@
{
"metadata": {
"name": "",
"signature": "sha256:437ca0df14a08cf4fd584f91122010286928f287ae14c5ac1ce8230abe9dbf9a"
"signature": "sha256:43a74f5daf674621e35388775c4372dd9587ddf80df1e26c2c8301ae66424581"
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@ -13,7 +13,9 @@
"metadata": {},
"source": [
"Sebastian Raschka \n",
"last updated: 04/15/2014"
"last updated: 04/15/2014\n",
"\n",
"[Link to this IPython Notebook on GitHub](https://github.com/rasbt/python_reference/blob/master/not_so_obvious_python_stuff.ipynb)"
]
},
{
@ -38,7 +40,7 @@
"- [The C3 class resolution algorithm for multiple class inheritance](#c3_class_res)\n",
"- [The behavior of += for lists](#pm_in_lists)\n",
"- [`True` and `False` in the datetime module](#datetime_module)\n",
"- [Some Python Oddity that I cannot explain, yet](#python_oddity)\n",
"- [Python reuses objects for small integers](#python_small_int)\n",
"- [Shallow vs. deep copies if list contains other structures and objects](#shallow_vs_deep)\n",
"- [Picking True values from and and or expressions](#false_true_expressions)"
]
@ -186,8 +188,10 @@
"source": [
"<br>\n",
"<br>\n",
"<a name='python_oddity'></a>\n",
"## Some Python Oddity that I cannot explain, yet"
"<a name='python_small_int'></a>\n",
"## Python reuses objects for small integers \n",
"\n",
"This oddity occurs, because Python tends to stores small integers as the same object, but not so for larger ones!"
]
},
{

10
not_so_obvious_python_stuff.ipynb
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@ -1,7 +1,7 @@
{
"metadata": {
"name": "",
"signature": "sha256:466467169d92398c710c1b7969b363ee4c4d32dcf96afa519dd8fb9162785cc4"
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@ -40,7 +40,7 @@
"- [The C3 class resolution algorithm for multiple class inheritance](#c3_class_res)\n",
"- [The behavior of += for lists](#pm_in_lists)\n",
"- [`True` and `False` in the datetime module](#datetime_module)\n",
"- [Some Python Oddity that I cannot explain, yet](#python_oddity)\n",
"- [Python reuses objects for small integers](#python_small_int)\n",
"- [Shallow vs. deep copies if list contains other structures and objects](#shallow_vs_deep)\n",
"- [Picking True values from and and or expressions](#false_true_expressions)"
]
@ -188,8 +188,10 @@
"source": [
"<br>\n",
"<br>\n",
"<a name='python_oddity'></a>\n",
"## Some Python Oddity that I cannot explain, yet"
"<a name='python_small_int'></a>\n",
"## Python reuses objects for small integers \n",
"\n",
"This oddity occurs, because Python tends to stores small integers as the same object, but not so for larger ones!"
]
},
{