row_input的使用：>>> name=raw_input("please input your name:")

please input your name:xiaobai

>>> name

'xiaobai'

編寫小程序，詢問用戶姓名，性別，年齡，工作，工資，以格式化的方式輸出：

Information of company stuff：

Name：

Age：

Sex：

Job：

代碼：[root@nfs-server ~]# vim information_of_stuff.py

#!/bin/python

name=raw_input("Please input your name:")

age=raw_input("Please input your age:")

sex=raw_input("Please input your sex:")

job=raw_input("Please input your job:")

print '''

==============================

Information of company stuff:

Name: %s

Age: %s

Sex: %s

Job: %s

=============================='''%(name,age,sex,job)

執行：[root@nfs-server ~]# python information_of_stuff.py

Please input your name:xiaobai

Please input your age:25

Please input your sex:male

Please input your job:engineer

==============================

Information of company stuff:

Name: xiaobai

Age: 25

Sex: male

Job: engineer

==============================

輸入一個0~100直接的數字讓用戶猜，并且猜測次數不能大于三次。[root@nfs-client2 ~]# vim guess_num.py

#!/bin/python

import os

os.system('clear') #執行時先清屏

real_num=int(raw_input("please input the real_num from 0 to 100:"))

os.system('clear') #輸入讓用戶猜的數字后清屏

retry_count=0 #設定循環關閉條件

while retry_count<3: #后面加冒號

guess_num=int(raw_input("Please input a number from 0 to 100:"))

if guess_num>real_num:

print "Wrong! Please try smaller!"

retry_count+=1 #自增

elif guess_num

print "Wrong! Please try bigger!"

retry_count+=1

else: #最后一個條件用

print "Congurations! You got it!"

break #跳出循環

else:

print "Too much times!"

Python不像shell，沒有fi循環關閉符號，而是通過縮進控制代碼層級，同一級代碼縮進應保持一致，if和else不屬于同一級，縮進不同也可執行，但不符合書寫規范。

raw_input輸入的是字符串，字符串與數字比較時會自動轉為ASCII值進行比較，因此要使用int將其轉換為整數類型，break為跳出循環。

ord：將字符串轉換為ASCII對應的值。>>> print ord("a")

97

>>> print ord("1")

49

優化代碼，以上代碼輸入回車或字符串會報錯，且數字不是隨機值，需要優化。[root@nfs-client2 ~]# vim guess_num.py

#!/bin/python

import os

import random

os.system('clear')

real_num=random.randrange(100)

os.system('clear')

retry_count=0

while retry_count<3:

guess_num=raw_input("Please input a number from 0 to 100:").strip() #去空格回車

if len(guess_num)==0: #判斷字符串長度是否為0

continue

if guess_num.isdigit(): #判斷是否全為數字

guess_num=int(guess_num)

else:

print "You should input a number instead of string!"

continue #跳出當前循環，進行下一次循環

if guess_num>real_num:

print "Wrong! Please try smaller!"

elif guess_num

print "Wrong! Please try bigger!"

else:

print "Congurations! You got the real number %d !"%real_num

break

retry_count+=1

else:

print "Too much times! The real number is",real_num

.strip()表示將輸入的空格和回車去掉；

len（guess_num）表示計算字符串的長度；

continue表示跳出當前循環，進行下一次循環；

isdigit()表示判斷是否全是數字；

將上述循環更改為for循環：[root@nfs-client2 ~]# vim guess_num_for.py

#!/bin/python

import os

import random

os.system('clear')

real_num=random.randrange(100)

os.system('clear')

for i in range(3):

guess_num=raw_input("Please input a number from 0 to 100:").strip()

if len(guess_num)==0:

continue

if guess_num.isdigit():

guess_num=int(guess_num)

else:

print "You should input a number instead of string!"

continue

if guess_num>real_num:

print "Wrong! Please try smaller!"

elif guess_num

print "Wrong! Please try bigger!"

else:

print "Congurations! You got the real number %d !"%real_num

break

else:

print "Too much times! The real number is",real_num

range為數組，其參數分別為起始值，末尾值，步長。>>> range(10)

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

>>> range(2,10,2)

[2, 4, 6, 8]

>>> range(2,20,5)

[2, 7, 12, 17]

設計一個多層循環，用戶輸入密碼正確的話進入目錄進行選擇，并能退出循環。[root@nfs-client2 ~]# cat mulit_loop.py

#!/bin/python

passwd="test"

logout=False #加跳出的flag

for i in range(3):

password=raw_input("Please input your password:").strip()

if len(password)==0:

continue

if password==passwd:

print "Welcome to login!"

while True:

user_select=raw_input('''

====================================

Please input a number to continue

1.Send files;

2.Send emalis;

3.exit this level;

4.exit the whole loop.

====================================

''').strip()

user_select=int(user_select)

if user_select==1:

print "Sending files as you wish!"

if user_select==2:

print "Sending emails as you wish!"

if user_select==3:

print "Exit this level,please re-input the password!"

break

if user_select==4:

print "Ok, let's have a break!"

logout=True

break

if logout==True:

break

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