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PythonÖÐÎļþ²Ù×÷¿ÉÒÔͨ¹ýopenº¯Êý£¬ÕâµÄÈ·ºÜÏñCÓïÑÔÖеÄfopen¡£Í¨¹ýopenº¯Êý»ñȡһ¸öfile object£¬È»ºóµ÷ÓÃread()£¬write()µÈ·½·¨¶ÔÎļþ½øÐжÁд²Ù×÷¡£
1.open
ʹÓÃopen´ò¿ªÎļþºóÒ»¶¨Òª¼ÇµÃµ÷ÓÃÎļþ¶ÔÏóµÄclose()·½·¨¡£±ÈÈç¿ÉÒÔÓÃtry/finallyÓï¾äÀ´È·±£×îºóÄܹرÕÎļþ¡£
file_object = open('thefile.txt')
try:
    all_the_text = file_object.read( )
finally:
    file_object.close( )
×¢£º²»ÄܰÑopenÓï¾ä·ÅÔÚtry¿éÀÒòΪµ±´ò¿ªÎļþ³öÏÖÒ쳣ʱ£¬Îļþ¶ÔÏófile_objectÎÞ·¨Ö´ÐÐclose()·½·¨¡£
2.¶ÁÎļþ
¶ÁÎı¾Îļþ
input = open('data', 'r')
#µÚ¶þ¸ö²ÎÊýĬÈÏΪr
input = open('data')
¶Á¶þ½øÖÆÎļþ: ´ò¿ª¶þ½øÖÆÎļþÒª¼Ó'b'±ê¼Ç
input = open('data', 'rb')
¶ÁÈ¡ËùÓÐÄÚÈÝ
file_object = open('thefile.txt')
try:
    all_the_text = file_object.read( )
finally:
    file_object.close( )
¶Á¹Ì¶¨×Ö½Ú
file_object = open('abinfile', 'rb')
try:
    while True:
        chunk = file_object.read(100)
        if not chunk:
            break
        do_something_with(chunk)
finally:
    file_object.close( )
¶ÁÿÐÐ
list_of_all_the_lines = file_object.readlines( )
Èç¹ûÎļþÊÇÎı¾Îļþ£¬»¹¿ÉÒÔÖ±½Ó±éÀúÎļþ¶ÔÏó»ñȡÿÐУº
for line in file_object:
    process line
3.дÎļþ
дÎı¾Îļþ
output = open('data', 'w')
д¶þ½øÖÆÎļþ
output = open('data', 'wb')
×·¼ÓдÎļþ
output = open('data', 'w+')
дÊý¾Ý
file_object = open('thefile.txt', 'w')
file_object.write(all_the_text)
file_object.close( )
дÈë¶àÐÐ
file_object.writelines(list_of_text_strings


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