python文法学習練習1

python文法学習練習1

Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.

    ****************************************************************
    Personal firewall software may warn about the connection IDLE
    makes to its subprocess using this computer's internal loopback
    interface.  This connection is not visible on any external
    interface and no data is sent to or received from the Internet.
    ****************************************************************
    
IDLE 1.2.1      
>>> ================================ RESTART ================================
>>> s ='abc'
>>> for a in s:
	print a
	;
	
SyntaxError: invalid syntax
>>> print s
abc
>>> for a in a:print a


Traceback (most recent call last):
  File "<pyshell#6>", line 1, in <module>
    for a in a:print a
NameError: name 'a' is not defined
>>> for a in s:print a

a
b
c
>>> str='akakak'
>>> str=str.replace('k',' 8')
>>> print str
a 8a 8a 8
>>> str='akakak'str=str.replace('k',' 8')str='akakak'
SyntaxError: invalid syntax
>>> str='akakak'
>>> str=str.replace('k','8')
>>> print str
a8a8a8
>>> str='a,hello'
>>> print str.find('hello')
2
>>> str='a,b,c,d'
>>> strlist=str.split(',')
>>> for value in strlist: print value

a
b
c
d
>>> def getclass(txt_s):
	str_array=txt_s.split('#')
	return str_array[0]

>>> print getclass('chen3#4.6men')
chen3
>>> print getclass('       ?# ?
     38.42 ?)
	       
SyntaxError: EOL while scanning single-quoted string
>>> print getclass('       ?# ?)
       ?
>>> t=getclass('       ?# ?)
>>> print t
       ?
>>> for a in t:print a

?
?
?
?
?
?
?
?
?
?
1
>>> num=-1
>>> print num
-1
>>> for a in t:
	if(a>=0 && a<=9):
		
SyntaxError: invalid syntax
>>> for a in t:
	if(a>=0 and a<=9):
		print a

		
>>> for a int t:
	
SyntaxError: invalid syntax
>>> for a in t:
	if(a==1) print a
	
SyntaxError: invalid syntax
>>> for a in t:
	if(a=='1'): print a

	
1
>>> dkbh=''
>>> for a in t:
	if(a=='1'):
		if(dkbh==''):
			dkbh=a
		else
		
SyntaxError: invalid syntax
>>> i=1
>>> while i<10:
	i+=1
	if i%2>0:
		continue
	print i

	
2
4
6
8
10
>>> print i
10
>>> i=1
>>> while 1:
	print i
	i+=1
	if(i>10):
		break

	
1
2
3
4
5
6
7
8
9
10
>>> def getclass(txt_s):
dkbh=''
for a in t:
	if(a=='1' or a=='2' or a=='3' or a=='4'):
		if(dkbh==''):
			dkbh=a
        else:		
            dkbh+=a
return dkbh
  File "<pyshell#68>", line 2
    dkbh=''
       ^
IndentationError: expected an indented block
>>> str='a,b,c,d'
>>> strlist=str.split(',')
>>> for value in strlist:
	print value

	
a
b
c
d
>>> def myadd(a=1,b=100):
	result=0
	i=a
	while i<=b:
		result+=i
		i+=1
	return result

>>> print myadd(1,10)
55
>>> print myadd()
5050
>>> print myadd(50)
3825
>>>  def getclass(txt_s):
dkbh=''
for a in txt_s:
	if(a=='1' or a=='2' or a=='3' or a=='4'):
		if(dkbh==''):
			dkbh=a
        else:		
            dkbh+=a
return dkbh
  File "<pyshell#85>", line 1
    def getclass(txt_s):
   ^
IndentationError: unexpected indent
>>> ================================ RESTART ================================
>>> a=1
>>> a.isnumeric()

Traceback (most recent call last):
  File "<pyshell#87>", line 1, in <module>
    a.isnumeric()
AttributeError: 'int' object has no attribute 'isnumeric'
>>> a.isnumeric

Traceback (most recent call last):
  File "<pyshell#88>", line 1, in <module>
    a.isnumeric
AttributeError: 'int' object has no attribute 'isnumeric'
>>> txt_s='sfsfsd3#2.6'
>>> print txt_s
sfsfsd3#2.6
>>> t=txt_s[0:txt_s.find('#')]
>>> print t
sfsfsd3
>>> print t.isdigit()
False
>>> for a in t: print a.isdigit()

False
False
False
False
False
False
True
>>> print t
sfsfsd3
>>> dkbh=''
>>> for a in t:
	if(a.isdigit()==true):
		if(dkbh==''):
			dkbh=a
		else
		
SyntaxError: invalid syntax
>>> for a in t:
	if(a.isdigit()==true):
		if(dkbh==''):
			dkbh=a
		else:
			dkbh+=a

    

Traceback (most recent call last):
  File "<pyshell#105>", line 2, in <module>
    if(a.isdigit()==true):
NameError: name 'true' is not defined
>>> for a in t:
	if(a.isdigit()==True):
		if(dkbh==''):
			dkbh=a
		else:
			dkbh+=a

			
>>> print dkbh
3
>>> 

getclass5(!RefName!) def getclass5(txt_s):          t=txt_s          t=t[0:t.find('#')]          dkbh=''          for a in t:              if(a.isdigit()==True):                  if(dkbh==''):                       dkbh=a                  else:                       dkbh+=a          return dkbh     
--the--end--
---2012-03-09---