目 錄
篇準(zhǔn)備工作
1 為什么要學(xué)習(xí)Python，學(xué)習(xí)Python 的什么.............................................................................. 3
2 學(xué)習(xí)Python 之前需要準(zhǔn)備的工作.............................................................................................. 6
3 如何看懂和運(yùn)行本書(shū)代碼............................................................................................................ 8
3.1 輸入部分..................................................................................................................................8
3.2 輸出部分............................................................................................................................... 10
3.3 錯(cuò)誤與異常信息.................................................................................................................. 11
3.4 外部數(shù)據(jù)文件.......................................................................................................................12
3.5 注意事項(xiàng)............................................................................................................................... 14
第二篇Python 基礎(chǔ)
4 數(shù)據(jù)類型......................................................................................................................................19
4.1 查看數(shù)據(jù)類型的方法.......................................................................................................... 20
4.2 判斷數(shù)據(jù)類型的方法...........................................................................................................21
4.3 轉(zhuǎn)換數(shù)據(jù)類型的方法...........................................................................................................22
4.4 特殊數(shù)據(jù)類型.......................................................................................................................23
4.5 序列類型...............................................................................................................................26
5 變量..............................................................................................................................................28
5.1 變量的定義方法...................................................................................................................29
5.2 Python 是動(dòng)態(tài)類型語(yǔ)言.....................................................................................................29
5.3 Python 是強(qiáng)類型語(yǔ)言........................................................................................................ 30
5.4 Python 中的變量名是引用.................................................................................................31
5.5 Python 中區(qū)分大小寫.........................................................................................................32
5.6 變量命名規(guī)范.......................................................................................................................32
5.7 iPython 的特殊變量............................................................................................................33
5.8 查看Python 關(guān)鍵字的方法............................................................................................... 34
5.9 查看已定義的所有變量.......................................................................................................35
5.10 刪除變量.............................................................................................................................37
6 語(yǔ)句書(shū)寫規(guī)范..............................................................................................................................39
6.1 一行一句............................................................................................................................... 40
6.2 一行多句............................................................................................................................... 40
vi
目 錄
6.3 一句多行............................................................................................................................... 41
6.4 復(fù)合語(yǔ)句.............................................................................................................................. 42
6.5 空語(yǔ)句................................................................................................................................... 43
7 賦值語(yǔ)句.......................................................................................................................................44
7.1 賦值語(yǔ)句在Python 中的重要地位................................................................................... 45
7.2 鏈?zhǔn)劫x值語(yǔ)句...................................................................................................................... 45
7.3 復(fù)合賦值語(yǔ)句...................................................................................................................... 46
7.4 序列的拆包式賦值.............................................................................................................. 46
7.5 兩個(gè)變量值的調(diào)換.............................................................................................................. 47
8 注釋語(yǔ)句......................................................................................................................................48
8.1 注釋方法............................................................................................................................... 48
8.2 注意事項(xiàng)............................................................................................................................... 49
9 運(yùn)算符..........................................................................................................................................50
9.1 特殊運(yùn)算符...........................................................................................................................53
9.2 內(nèi)置函數(shù)................................................................................................................................57
9.3 math 模塊.............................................................................................................................58
9.4 優(yōu)先級(jí)與結(jié)合方向...............................................................................................................59
10 if 語(yǔ)句...........................................................................................................................................61
10.1 基本語(yǔ)法.............................................................................................................................61
10.2 elif 語(yǔ)句..............................................................................................................................62
10.3 if 與三元運(yùn)算......................................................................................................................63
10.4 注意事項(xiàng)............................................................................................................................ 64
11 for 語(yǔ)句.........................................................................................................................................66
11.1 基本語(yǔ)法.............................................................................................................................67
11.2 range()函數(shù)........................................................................................................................67
11.3 注意事項(xiàng).............................................................................................................................68
12 while 語(yǔ)句....................................................................................................................................71
12.1 基本語(yǔ)法.....................................................................