11、提問

print "How old are you?", 
age = raw_input()
print "So, you're %r old." % age
python ex11.py
How old are you? 35
So, you're '35' old

input()與raw_input()都是Python的內建函數，實現與用戶的交互，但是功能不同。

raw_input可代表任意字符串

input在字符串上要加‘ ’

int類型最好使用input

12、提示別人

對於 raw_input 而言，你還可以讓它顯示出一個提示，從而告訴別人應該輸入什麽東西。你可以在 () 之間放入一個你想要作為提示的字符串，如下所示：

y = raw_input("Name? ")

pydoc是python內置的官方文檔，類似於linux中的man

13、參數、解包、變量

from sys import argv 
script, first, second, third = argv 
print "The script is called:", script 
print "Your first variable is:", first 
print "Your second variable is:", second 
print "Your third variable is:", third
python ex13.py first 2nd 3rd
The script is called: ex13.py 
Your first variable is: first 
Your second variable is: 2nd 
Your third variable is: 3rd

14、提示和傳遞

from sys import argv
script, user_name = argv
prompt = '>'
print "Hi %s, I'm the %s script." % (user_name, script)
print "I'd like to ask you a few questions."
print "Do you like me %s?" % user_name
likes = raw_input(prompt)
print "Where do you live %s?" % user_name 
lives = raw_input(prompt) 
print "What kind of computer do you have?" 
computer = raw_input(prompt) 
print """ 
Alright, so you said %r about liking me. 
You live in %r. Not sure where that is. 
And you have a %r computer. Nice.
 """ % (likes, lives, computer)

$ python ex14.py Zed 
Hi Zed, I'm the ex14.py script. 
I'd like to ask you a few questions. 
Do you like me Zed? 
> yes Where do you live Zed? 
> America What kind of computer do you have? 
> Tandy 
Alright, so you said 'yes' about liking me. 
You live in 'America'. Not sure where that is. 
And you have a 'Tandy' computer. Nice.

15、讀取文件

$ vi ex15_sample.txt
This is stuff I typed into a file.
It is really cool stuff.
Lots and  lots of fun to have in here.

我們要做的是打開 ex15_sample.txt

from sys import argv
script, filename = argv
txt = open(filename)
print "Here's your file %r:" % filename
print txt.read()
print "Type the filename agein:"
file_again = raw_input(">")
txt_again = open(file_again)
print txt_again.read()

16、讀寫文件

from sys import argv
script, filename = argv
print "We're going to erase %r." %filename
print "If you don't want that, hit CRIL-C(^C)."
print "If you do want that, hit RETURN."
raw_input("?")
print "Opening the file..."
target = open(filename, 'w')
print "Truncating the file. Goodbye!"
target.truncate()
print "Now I'm going to ask you for three lines."
line1 = raw_input("line 1: ")
line2 = raw_input("line 2: ")
line3 = raw_input("line 3: ")
print "I'm going to write whese to the file."
target.write(line1)
target.write("\n")
target.write(line2)
target.write("\n")
target.write(line3)
target.write("\n")
print "And finally, we close it."
target.close()

17、更多文件操作

from os.path import exists

print "%r" % exists(to_file) #查看to_file有有沒用存在，會返回布爾值

print "d%" % len(indata) #查看有多少個字節

# 朝to_file裏寫入數據，寫入indata

output = open(to_file, 'w')

output.write(indata)

output.close() #關閉

18、命令、變量、代碼、函數

#coding:utf-8
def nan_nad_nv(nan_count,nv_count):
        print "我們IT男生有%d。" % nan_count
        print "我們IT女生有%d。" % nv_count
print "IT人員數目為："

>>> nan_nad_nv(60,20)
結果
IT人員數目為：
我們IT男生有60。
我們IT女生有20。

19、函數和變量

def cheese_and_crackers(cheese_count, boxes_of_crackers): 
    print "You have %d cheeses!" % cheese_count 
    print "You have %d boxes of crackers!" % boxes_of_crackers
cheese_and_crackers(20, 30)
結果
You have 20 cheeses!
You have 30 boxes of crackers!
amount_of_cheese = 10 
amount_of_crackers = 50 
cheese_and_crackers(amount_of_cheese, amount_of_crackers)
結果
You have 10 cheeses!
You have 50 boxes of crackers!

20、函數和文件

掌握以下參數意義

f.seek(0)

f.readline()

笨方法學習Python（11-20）