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victorgau committed Mar 24, 2017
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479 changes: 479 additions & 0 deletions 01_basics/01. Python 簡介.ipynb
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624 changes: 624 additions & 0 deletions 01_basics/02. Python 安裝及使用.ipynb
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392 changes: 392 additions & 0 deletions 01_basics/03. Python 的變數.ipynb
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"# Python 程式設計教學\n",
"\n",
"## Victor Gau\n",
"\n",
"### [[email protected]](\"mailto:[email protected]?subject=[Question]QF20170311\")\n",
"\n",
"### 2017-03-11\n",
"\n"
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"# Python 的變數"
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"source": [
"## 變數的命名規則\n",
"\n",
"* 變數名稱最好以英文字母或底線做開頭 (數字不能做開頭)\n",
" - \\_variable, variable, variable\\_ \n",
"* 除開頭字元外，其他字元使用數字、底線、或英文字母\n",
" - _var123, var_123\n",
"* 變數會區分大小寫\n",
"* 避開 keywords\n",
"* 避開 [built-in objects](https://docs.python.org/3/library/builtins.html)"
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"字串 = \"Hello World!\"\n",
"\n",
"print(字串)\n",
"\n",
"# 咦... 可以用中文變數耶！！！\n",
"\n",
"# 但是請不要這樣用，因為在使用很多套件時，這樣的變數名稱可能會造成問題。"
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"import string\n",
"\n",
"# help(string)\n",
"\n",
"# ?string\n",
"\n",
"string.ascii_letters"
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"# Keywords\n",
"\n",
"import keyword\n",
"\n",
"print(keyword.kwlist)"
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"# https://docs.python.org/3/reference/executionmodel.html\n",
"\n",
"# built-in objects\n",
"\n",
"# Python 2.7.x\n",
"#import __builtin__\n",
"#\n",
"#dir(__builtin__)\n",
"\n",
"# Python 3.5\n",
"\n",
"import builtins\n",
"\n",
"print(dir(builtins))"
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"### 兩個好用的函數：\n",
"\n",
"* type()\n",
"* dir()"
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"# 使用 type() 列出變數型別\n",
"\n",
"a = 1\n",
"\n",
"type(a)"
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"b = '123'\n",
"\n",
"type(b)"
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"# 使用 dir() 列出 local scope 裡面有那些變數或模組等\n",
"dir()\n",
"\n",
"# 關於 magic methods\n",
"# http://minhhh.github.io/posts/a-guide-to-pythons-magic-methods"
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"# 使用 dir(module) 列出模組可以使用的屬性及方法等\n",
"\n",
"dir(sys)"
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"# 使用 dir() 列出物件的方法及屬性\n",
"\n",
"print(dir(b))"
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