[EMAIL PROTECTED] writes:
Hi,
suppose I am reading lines from a file or stdin.
I want to just "peek" in to the next line, and if it starts
with a special character I want to break out of a for loop,
other wise I want to do readline().
Is there a way to do this?
for example:
while 1:
line=stdin.peek_nextline()
if not line: break
if line[0]=="|":
break:
else:
x=stdin.nextline()
# do something with x
thanks
-- http://mail.python.org/mailman/listinfo/python-list
Well what you can do is read the line regardless into a testing variable.
here is some sample code (writting this off the topof my head so syntax might be off some)
import re
file = open("test.txt", 'r')
variablestr = '' #this would be your object.. in my example using a string for the file data
file.seek(0,2)
eof = file.tell() #what this is the position of the end of the file.
file.seek(0,0)
while file.tell() != eof:
testline = file.readline()
if re.match("#", testline) == True:
break
else:
variablestr += testline
file.close()
now if I was concerned with being at the beging of the testline that it read in what you can do is in the if is something like:
file.seek((file.tell() - len(testline)), 0)
and that will move you back to the beginging of that line which is where the readline from the previous call left you before the "peek".
hope that helps some..
Jeff -- http://mail.python.org/mailman/listinfo/python-list
I noticed something in my code.
re.match("#", testline) == True isn't possible it would be more like.
re.match("#", testline) != None
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