python基础教程（自编精品）

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s=\www.jeapedu.com\*5n=s.count(\jeapedu\i=0pos=-1while

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pos=s.index(\jeapedu\,pos+1)print’find\\\jeapedu\\\ins:’,posi+=1

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find\jeapedu\ins:find\jeapedu\ins:find\jeapedu\ins:find\jeapedu\ins:find\jeapedu\ins:

??indexU???¤k??”jeapedu”??vk???o??count?êúO???i?Gpk????§???????é?g???????\XJòi?nU¤i?=nò??ì???é?g?????\

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s=\www.jeapedu.com\*5n=s.count(\jeapedu\i=0pos=-1

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whilei<=n:

pos=s.index(\jeapedu\,pos+1)print’find\\\jeapedu\\\ins:’,posi+=1

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find\jeapedu\ins:find\jeapedu\ins:find\jeapedu\ins:find\jeapedu\ins:find\jeapedu\ins:

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Traceback(mostrecentcalllast):

File\:/Python27/code/mytest.py\line17,in

pos=s.index(\jeapedu\,pos+1)ValueError:substringnotfound

e?′replace?ê??|^?~\

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s=\www.jeapedu.com\*3

prints

s=s.replace(’j’,’J’,2)prints

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www.jeapedu.comwww.jeapedu.comwww.jeapedu.comwww.Jeapedu.comwww.Jeapedu.comwww.jeapedu.com

6.6i?G?:?S6.6.1??i?G

1?<-x=12.??

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s=\=12\

prints

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12

x=12

print\=\,x

?K^i?G\\{

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x=\12\s=\=\+xprints

?K^i?G?az??

12

x=12

print\=%d\%(x)

2?<-www.jeapedu.comwww.jeapedu.com......www.jeapedu.com.??

ù￥-www.jeapedu.com’-E?zg\

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s=\www.jeapedu.com\w=\i=0

whilei<100:

w+=si+=1printw

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s=\www.jeapedu.com\*100prints

3?

”http://www.http://www.diyifanwen.net//s?wd=latex&pn=10&tn=baiduhomepg&ie=utf-8&usm=1”

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m?oc.??udêe?eapj.www”http://www.http://www.diyifanwen.net//s?wd=latex&pn=300&tn=baiduhomepg&ie=utf-8&usm=1”

Cz??′pn????êil10～300\

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x=10

whilex<=300:

x=x+10

sb=\http://www.http://www.diyifanwen.net//s?wd=latex&pn=\str(x)+\tn=baiduhome_pg&ie=utf-8&usm=1\printsb

5

6.6.2i?G?\\

1input?ê?\\êi123??

12

a=input(\plzinputyourage:\printa

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2rawinput?ê?\\i?G-jeapedu.com.??

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name=raw_input(\plzinputyourname:\printname

3rawinput?ê?\\êi.i?G-123.?n¤??/123??

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age=input(\plzinputyourage:\t=int(age)printt

6.6.3i?G￠ú

1?Lindex￠ú–ˉi?Gpi1-j.??

12

s=\hello’jack’...\

prints[7]

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s=\hello’jack’...\prints[s.find(’j’)]

6.6.4i?G??

1??iG’jeapedu’??

12

s=\www.jeapedu.com\prints[4:11]

m?oc.??udêe?eapj.www??^?ndúindex?êé??’j’ú’.’?? ?

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s=\www.jeapedu.com\b=s.find(’j’)e=s.find(’.’,b)

prints[b:e]

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s=\www.jeapedu.com\sub=’jeapedu’

n=len(sub)

prints[s.find(’j’):s.find(’j’)+n]

?K

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6.6.i?G?:?S

12

s=\www.jeapedu.com\

prints[4]+s[5]+s[6]+s[7]+s[8]+s[9]+s[10]

?K?L??é’ed’5??’jeapedu’i?G

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s=\www.jeapedu.com\ed=s.find(’ed’)

prints[ed-4:ed+3]

2òi?Gp??????’j’?¤?????’J’??

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s=\www.jeapedu.com\

b=s.find(’j’)

s=s[:b]+’J’+s[b+1:]prints

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12

s=\www.jeapedu.com\

s=s[:s.find(’j’)]+’J’+s[s.find(’j’)+1:]

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12

s=\www.jeapedu.com\

s=s[:s.index(’j’)]+’J’+s[s.index(’j’)+1:]

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12

s=\www.jeapedu.com\

s=s.replace(’j’,’J’,1)

m?oc.??udêe?eapj.www3O?K??????’j’?¤?????’J’??

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s=\www.jeapedu.com\*10

i=0b=-1

whilei<10:

b=s.find(’j’,b+1)

s=s[:b]+’J’+s[b+1:]printsi=i+1

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12

s=\www.jeapedu.com\*10s=s.replace(’j’,’J’,10)

43

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