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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( )
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2.¶ÁÎļþ
¶ÁÎı¾Îļþ
input = open('data', 'r')
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input = open('data')
¶Á¶þ½øÖÆÎļþ
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( )
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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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>>> x=int(raw_input("please enter an integer:"))
please enter an integer:-8
>>> if x<0:
... print 'negative'
... elif x==0:
... print 'zero'
... else:
... print 'positive'
...
negative
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