Python

Python RSS

File Handling

Thread Solved

•

Join Date: Jul 2008

Posts: 23

Reputation: Zetlin is an unknown quantity at this point

Solved Threads: 1

Zetlin

Offline

Newbie Poster

File Handling

Jul 5th, 2009

Ok so I was working on file handling, nothing special just making new (.txt) files and putting some text in it. That works fine the problem is that when I try to read the file from within python nothing comes up and when I try to open the file once I close it from python it has all this weird letters along with what i wrote in that file. I know this doesn't make sense at all so here is an example of what is going on.

 Help with Code Tags 
 python Syntax (Toggle Plain Text) 
 
new_file = open("Test.txt", "w")
new_file.write("Hello World")
print new_file.read()
new_file.close()
new_file = open("Test.txt", "w")
new_file.write("Hello World")
print new_file.read()
new_file.close()

Ok so thats what I wrote into the IDlE, the first problem is that when I ask python to print what I wrote into that file, I dont get anything back just a blank line. Then when I go and check the new file this is what I get :

•

Hello World ¦’{á ª ù° §xÝã 4¶ ðF¸ ±ß) ‹œ p| ³(Êî`ü¶ 0á¸ µ kv€™ §™ Í3 x• x• ¸²Ê+ b¹ ð¹ »îí'(üº ð¹ ½š½ø„§ ð¹¾Z->`º Pžº ÂvÙÈw· °X· ÄÊú¬à|ž ÷° ÆÞ;0R§ ð¹ Èùoˆ&· ð¹É›ÀÈ˜ ð¼™ ÐD[| {ž °
¨ Ô¬Ð0n¸ 0æ¸ × Ö J˜ P ÙŽú< – €K— Û¬å "· ð¹ â"±„`¬› 0œ ã&¯Ö'² ps¨ å^Á×`|ž %Ÿ æò÷@Ðž ÐE§ èür¼0ùž ð¹ ë"
uX™ž E§ òœ÷˜ ¹ ð•¹ ß™ÌO h¸ ðN¸ ûNrÎà°¨ |¨ üîÄ¨ L— P™ ýFylà™µ °é¶ ß\Šç´ °µ uráàlº ð¹ Y®œ } ¥ ÿäXÄ– ð– ¯êÆ ¤› P| ‘Ãª ôª ð7¶ f¹ôž ð¹ !ÓP¹ F¹ $½(oÍ³ ð¹ )WÂ@A— ™ +'£] %Ÿ Ð%Ÿ ,y0€º ðÐº /m>³‰ © ÞŠv@Á˜ §™ ;ñYÝ· ð¹<_Õ`nº ð¹=Íì – ð¹ Bhk€7¶ 0è¶ I93•°± üª #7€M˜ PM˜ VwMÚÀ ¹ ð¹ ]ßàpÀ§ ð¹ _÷1+ ?¶ 0à¶ `ã8`§› °¨› fÃhk@ª ð]² gY3
ÀO— È¼ž kÕã´Ðn² ð¹ pC4¿ˆAº ð¹q¹ÄÔàóž ð¹ u1¯æ°ü™ s xAŒ}ø¤— pG— yYP˜ˆ† ðž ƒmÔ®Àö° Ðø° „Un,à™ ð£› …Si8† p¥ ‰WÒ º PÓº ™Š
œ Ðrž ’Ó¡°ñ¹ Ýº —£‹' K— pK— ›ÙÈ4 L¨ ð¹ ¢Ç1Øöº Öº FHJH¿¶ ð¹ òÜÎV`ûž ð¹ I‹gÀ ¼çf( À˜ 0™ À–`Ÿ ð¹ Â?jÀ@™ Ð°™ Ã›½œ@%Ÿ 0+Ÿ ÇóŒXàwž °wž È_Ëò §œ ð¹ ÈŠ°¸¨‰– ð– ÐU¥ÞàÖ– °Ö– ÑK‘H•¨ ð¹ ÕûŒFØK¨ pu¨ Ö³,²È³ °Ô³ ùKˆÏ ¶ ð¹ ¥ÏèÚ°#» ð¹ Þ £› ¨› ¥Á…û`D² °Z² §°†¯à ¹ °N¹ ìE‰¡ zž Ðyž í3´ ± V± ñ«ÿC@“ž 0yž ÷‡=ü |ž °Õž

Why is it that no human being knows the true meaning of life? For the reason that those who have found it are too caught up in their rage to understand that it ends.

•

Join Date: Feb 2007

Posts: 1,602

Reputation: scru has a spectacular aura about

Solved Threads: 130

scru

Offline

Posting Virtuoso

Re: File Handling

Jul 5th, 2009

Line four didn't get you anything? You should've gotten an IO error; you're not supposed to read from files you open for writing. If even you had opened the file as w+, you still should've gotten that blank line, because of the position you are in the file (past what you have written). Files are sequential.

As to that junk text, I have no idea what's going on there.

•

Join Date: Jul 2008

Posts: 23

Reputation: Zetlin is an unknown quantity at this point

Solved Threads: 1

Zetlin

Offline

Newbie Poster

Re: File Handling

Jul 5th, 2009

Well that was very simple i feel so dumb

Why is it that no human being knows the true meaning of life? For the reason that those who have found it are too caught up in their rage to understand that it ends.

•

Join Date: Feb 2007

Posts: 1,602

Reputation: scru has a spectacular aura about

Solved Threads: 130

scru

Offline

Posting Virtuoso

Re: File Handling

Jul 5th, 2009

Is everything okay now?

•

Join Date: Jul 2008

Posts: 23

Reputation: Zetlin is an unknown quantity at this point

Solved Threads: 1

Zetlin

Offline

Newbie Poster

Re: File Handling

Jul 5th, 2009

yea thank for the help

Why is it that no human being knows the true meaning of life? For the reason that those who have found it are too caught up in their rage to understand that it ends.