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當我嘗試在Python中同時讀取和寫入.txt文件時，結果非常奇怪。Python，當讀取+同時寫入文件時出現奇怪的文字
from sys import argv
script, filename = argv
print """The contents of this .txt file will now be erased.
if you don don't wish to do this. Hit CTRL+C.
if you want to do this. Just click ENTER.
"""
raw_input("> ")
target = open(filename, 'w+') #opens the file to read+write simultaneously
newline1 = raw_input("the first line: ") #three lines of strings to add to the .txt file
newline2 = raw_input("the second line: ")
newline3 = raw_input("the third line: ")
target.write(("%s\n%s\n%s") % (newline1, newline2, newline3)) #writes the lines to the file
print "this is what's currently written inside the .txt file:\n"
print target.read() #reads the contents of the file
target.close() #closes and saves the file
但隨後的文件只是讀出該jibberish（包括.txt文件裏面，當它在程序的讀取）的內容，而不是簡單的3線：
s· d Z d d l Z d e j f d „ ƒ YZ d e j f d „ ƒ YZ d e j f d „ ƒ YZ d e e j f d
„ ƒ YZ d e e j f d „ ƒ YZ d
„ Z d Z e j e ƒ Z
d S( sv Python Character Mapping Codec cp1252 generated from 'MAPPINGS/VENDORS/MICSFT/WINDOWS/CP1252.TXT' with gencodec.py.
iÿÿÿÿNt Codecc B s e Z d d „ Z d d „ Z RS( t strictc C s t j | | t ƒ S( N( t codecst charmap_encodet encoding_table( t selft inputt errors( ( s# C:\Python27\lib\encodings\cp1252.pyt encode s c C s t j | | t ƒ S( N( R t charmap_decodet decoding_table( R R R ( ( s# C:\Python27\lib\encodings\cp1252.pyt decode s ( t __name__t
__module__R R ( ( ( s# C:\Python27\lib\encodings\cp1252.pyR s t IncrementalEncoderc B s e Z e d „ Z RS( c C s t j | | j t ƒ d S( Ni ( R R R R ( R R t final( ( s# C:\Python27\lib\encodings\cp1252.pyR s ( R R
t FalseR ( ( ( s# C:\Python27\lib\encodings\cp1252.pyR s t IncrementalDecoderc B s e Z e d „ Z RS( c C s t j | | j t ƒ d S( Ni ( R R R R
( R R R ( ( s# C:\Python27\lib\encodings\cp1252.pyR s ( R R
R R ( ( ( s# C:\Python27\lib\encodings\cp1252.pyR s t StreamWriterc B s e Z RS( ( R R
( ( ( s# C:\Python27\lib\encodings\cp1252.pyR s t StreamReaderc B s e Z RS( ( R R
( ( ( s# C:\Python27\lib\encodings\cp1252.pyR s c C [email protected] t j d d d t ƒ j d t ƒ j d t d t d t d t ƒ S( Nt namet cp1252R R t incrementalencodert incrementaldecodert streamreadert streamwriter( R t CodecInfoR R R R R R R ( ( ( s# C:\Python27\lib\encodings\cp1252.pyt getregentry! s u–
!"#$%&'()*+,-./:;<=>[email protected][\]^_`abcdefghijklmnopqrstuvwxyz{|}~€￾‚ƒ„…†‡ˆ‰Š‹Œ￾Ž￾￾‘’“â€â€¢â€「â€」˜™š›Å「￾žŸ ¡¢£¤¥¦§¨©ª«¬Â®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÃÂÃÄÅÆÇÈÉÊËÌÃÃŽÃÃÑÒÃ「Ã」ÕÖ×ØÙÚÛÜÃÞßà áâãäåæçèéêëìÃîïðñòóôõö÷øùúûüýþÿ( t __doc__R R R R R R R R
t
charmap_buildR ( ( ( s# C:\Python27\lib\encodings\cp1252.pyt <module> s ÿ ó:›› ™øÌ pò åP§ü a^v– Qý LýHVzàý0DýI.*Èý ýJ²ã¨@ÏüðÒüK6=XÙü0Ùü NÆüü ËüOžç5˜¯üp¯ü±v%P¿õýüQöy€Íüàü•ë[email protected]ýMýSž@3 èü˜õü_å’Ï`FýøDý ßEïÐþüü¹ý¥t€ìüXþüXžf9`âü0Ùü Z2ðÀãüˆÛü O°s÷ÀýhØü]B] ìüþü^ÒÏZ€ýðý_NÅô Èü §ü GbP€åüÐÞüDÆí OüXþü[email protected]ýxGýH¯«ÐPBý ¬üeú¿ýüðüüf¾Àëü(üüeõ5¸óüóü ¼å»úXDý0Dý k®à áüÔülš¦ âü0¤ü n"éÍ@!ý8Aý½-ò¡àý¸ý q.&yxLýPLý s¦v8(×ü0Ôü ¾]ª[àÝü¸Ýü;
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編輯：在閱讀之前我添加了target.seek(0)行後，它工作。但是要知道是什麼原因導致亂語被寫出來仍然很有趣！
在閱讀之前試試target.seek（0）？ – Broseph
如果不倒帶文件位置標題，則無法寫入，然後讀取。使用'file.seek（）'來做（'file.seek（0）'回到開始）。 –
在print target.read（）之前添加'target.seek（0）'給我預期的輸出。即使沒有'seek'調用，我仍然可以在文本文件中看到正確的輸出，我不知道你是如何在文件中得到太多亂碼的。 – GWW