[python] najdi, nahrad, uloz v ascii subore

[Leos Pol]

Ano, soubor se precte cely a pri opravdu velkych souborech to muze 
skoncit na pameti. Napada me pouze jeden zpusob, jak toto vyresit. 
Prochazet vstupni soubor po radcich, vzdy nacist cely block (NAME, 
CODE), pripadne pozmenit a vzdy to pridat do noveho souboru. Nakonec 
novy soubor prejmenovat na puvodni.
Leo

peter wrote:
> Diky moc,
>
> pokial som dobre pochopil z manualu tak
>
> content = fd.read()
>
> nacita cely obsah suboru do cache alebo bufferu, a to je prave to co ja
> nechcem, pretoze pracujem s velkymi subormi. Chcem sa vyhnut tomu ze
> nacitam vsetko do pamate, nahradim co potrebujem a potom to zase vsetko
> ulozim. Ale neviem ci je to vobec mozne, nie som az taky velky
> specialista v pythone. V mojom kode idem po jednotlivych riadkoch
> suboru....
>
>
> Leos Pol wrote:
>   
>> Ahoj,
>> omlouvam se, ale nedokazal jsem tvuj kod opravit, tak posilam alespon
>> svoje reseni:
>>
>>     import re
>>     fd = open('data.txt', 'r+')
>>     content = fd.read()
>>     delimiter = re.search('\$-+', content).group()
>>     blocks = re.split('\$-+', content)
>>     for idx in range(len(blocks)):
>>         if 'NAME=\'ALFA\'' in blocks[idx]:
>>             code = re.search('CODE=\'(.*)\'', blocks[idx]).groups()
>>             blocks[idx] = blocks[idx].replace('NAME=\'ALFA\'',
>>     'NAME=\'BETA%s\'' % code)
>>     fd.seek(0)
>>     fd.write(delimiter.join(blocks))
>>     fd.close()
>>
>> Doufam, ze to pomuze,
>> Leo
>> PS: nejspise ale asi hledas "seek" a "tell".
>>
>> peter wrote:
>>     
>>> Zdravim,
>>>
>>> potreboval by som poradit.
>>>
>>> Priklad (jeden blok v subore):
>>> $------------------------
>>> NAME='ALFA'
>>> CODE='x'
>>> $------------------------
>>>
>>> Takychto blokov je v subore vela s roznymi menami a kodmi. Potrebujem
>>> naprogramovat skript ktory prehlada cely subor a najde vyrazy s menami
>>> ALFA a podla toho co za kazdou ALFOU bude nasledovat (napr. x,y,z)
>>> zmeni meno ALFA na BETAx,BETAy, BETAz a zemeneny subor ulozi.
>>>
>>> Dostal som sa k tomu ze najdem vsetky vyrazy ktore potrebujem, podla
>>> kodu zmenim meno na BETAx,y alebo z ale uz neviem ako zapisat nove
>>> nazvy na rovnake miesto ako bola dana ALFA. Vzdy mi to zapise na koniec
>>> suboru. Tu je moj kod.
>>> Dakujem vopred za akukolvek pomoc.
>>>
>>> Moj kod:
>>>
>>>  import shutil
>>>
>>> NamFile="test2.nam"
>>> BackupNamFile = 1
>>> if BackupNamFile == 1:
>>>      shutil.copyfile(NamFile,NamFile.replace(".nam",".nam.bak"))
>>> LineNum=1
>>> LineNumQuantity=0
>>> ArrayCount=0
>>> LineNumArray=[]
>>> ReqArray=[]
>>> ReqName=""
>>> NamFileOpen=file(NamFile,"r+")
>>> for line in NamFileOpen:
>>>      LineTextFound1 = line.find("bk")
>>>      LineTextFound2 = line.find("_results")
>>>      if LineTextFound1 != -1 and LineTextFound2 != -1:
>>>           ReqName=line.split("'")[1]
>>>           print "Line: \t\t\t"+ str(LineNum)
>>>           print "Request Name: \t\t"+ ReqName
>>>           LineNumQuantity = LineNum + 2
>>>           ReqArray=[LineNum-2,ReqName]
>>>      if LineNum == LineNumQuantity:
>>>           QuantityName=line.split("'")[1]
>>>           print "Quantity Type: \t\t"+QuantityName
>>>           if QuantityName == "dx":
>>>                Suffix = "_disp"
>>>           elif QuantityName == "vx":
>>>               Suffix = "_velo"
>>>           elif QuantityName == "fx":
>>>                Suffix = "_force"
>>>           else:
>>>                Suffix = "_results"
>>>           print "Suffix: \t\t"+Suffix
>>>           NewReqName=ReqName.replace("_results",Suffix,1)
>>>           ReqArray.append(NewReqName)
>>>           LineNumArray.insert(ArrayCount,ReqArray)
>>>           ArrayCount+=1
>>>           print "New Request Name: \t"+NewReqName
>>>           print "-----------------------"
>>>      LineNum = LineNum+1
>>> print LineNumArray
>>> print len(LineNumArray)
>>> NamFileOpen.close()
>>>
>>> NamFileOpen2=file(NamFile,"r+")
>>> LineNum=1
>>> for i in LineNumArray:
>>>      print i
>>>      for line in NamFileOpen2:
>>>           print line
>>>           print LineNum
>>>           print i[1]
>>>           if i[0]== LineNum:
>>>                print i[0]
>>>                print LineNum
>>>                print line
>>>                Temp=line.replace(line.split("'")[1],i[2],1)
>>>                print Temp
>>>                NamFileOpen2.write(Temp)
>>>           LineNum=LineNum+1
>>> NamFileOpen2.close()
>>>
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>>>
>>>       
>> --
>> ----
>> Leos Pol
>> SW Engineer
>> Radiante Corp.
>>
>> If it can be imagined,
>> we can implement it
>>     
>
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>   


-- 
----
Leos Pol
SW Engineer
Radiante Corp.

If it can be imagined,
we can implement it