習題9：打印，打印，打印
話不多說，先熟悉下手感
ex9.py
# -*- coding: utf-8-*-
# Here's some new strange stuff,remember type it exactly.
days ="Mon Tue Wed Thu Fri SatSun"
months = "Jan\nFeb\nMar\nApr\nMay\nJun\nJul\nAug"
print "Here are the days: ", days
print "Here are the months: ", months
print """
There's something going on here.
With the three double-quotes.
We'll be able to type as much as welike.
Even 4 lines if we want, or 5, or 6.
"""
運行結果:
感悟與自我測試:
學習到了2個知識點：
1：\n表示換行
2：打印一段話，前後均用"""符號包裹住就好。
ex9_1.py
#-*- coding: utf-8-*-
name ="Jack Mary Kitty BlackTom"
hobbies = "singingg\nruningg\nclimbing"
print "I have some good friends.\nThey are" +name
print "In the weekend, I will do some thing:",hobbies
print "Inthe weekend, I will do some thing:"+hobbies #此處對比，+好和逗號看起來區別不大，本質上講+表連接，逗號表分隔參數
運行結果:
習題 10: 那是什麼？
上一個練習就是兩種讓字符串擴展到多行的方法：使用\n和轉義符（轉義序列）
ex10.py
# -*- coding: utf-8-*-
tabby_cat = "\tI'm tabbledin."
persian_cat = "I'm split\non aline."
backslash_cat = "I'm \\ a \\ cat."
fat_cat = """
I'll do a list:
\t* Cat food
\t* Fishies
\t* Catnip\n\t* Grass
"""
print tabby_cat
print persian_cat
print backslash_cat
print fat_cat
運行結果:
|
轉義符 |
功能 |
|
\\ |
Backslash() 反斜槓 |
|
\' |
Single quote (‘) 單引號 |
|
\" |
Double quote (”) 雙引號 |
|
\a |
ASCII Bell (BEL) 響鈴符 |
|
\b |
ASCII Backspace (BS) 退格符 |
|
\f |
ASCII Formfeed (FF) 進紙符 |
|
\n |
ASCII Linefeed (LF) 換行符 |
|
\N{name} |
Unicode 數據 庫中的字符名， 其中 name 就 是它的名字 (Unicode only) |
|
\r ASCII |
Carriage Return (CR) 回車符 |
|
\t ASCII |
Horizontal Tab (TAB) 水 平製表符 |
|
\uxxxx |
值爲 16 位十 六進制值 xxxx 的字符 (Unicode only) |
|
\Uxxxxxxxx |
值爲 32 位十 六進制值 xxxx 的字符 (Unicode |
|
\v |
ASCII Vertical Tab (VT) 垂直制 表符 |
|
\ooo |
爲八進制值 ooo 的字符 |
|
\xhh |
值爲十六進制 數 hh 的字符 |
ex10_1.py
# -*- coding: utf-8-*-
tabby_cat = "\tI'm tabbled in." #水平製表符，初始佔據第八列
persian_cat = "I'm split\non a line." #換行符號
backslash_cat = "I'm \\ a \\ cat." #\\表示一個字符串斜槓
fat_cat = """
I'll do a list:
\t* Cat food
\t* Fishies
\t* Catnip\n\t* Grass
"""
#水平製表符，初始佔據第八列
print tabby_cat
print persian_cat
print backslash_cat
print fat_cat
while True:
for i in["/","-","|","\\","|"]:
print "%s \r" % i,
#結果很好玩，出現一個| 一直轉，貌似是一個簡單的無限循環，將I中的定義字符串一直回車，挨個循環輸出貌似就形成了一直轉的狀態，實際是挨個輸出形成的視覺錯誤（個人感覺）
運行結果:
