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  #1  
Old January 25th, 2004, 07:31 PM
XxChris XxChris is offline
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Working with files

I'm not sure why this doesn't work. It's pretty simple... just tests if it can read/write the file.

Code:
#! /usr/bin/env python

import sys

class FileCheck:
	def check(self, filename):
		try:
			fp = open("filename", "r")		
			print "Can read from " + filename
			fp.close()
		except:
			print "Cannot read from " + filename
		
		try:
			fp = open("filename", "w")
			print "Can write from " + filename
			fp.close()
		except:
			print "Cannot read from " + filename

def main():
	file = FileCheck()	

	if len(sys.argv) != 2:
		print "Usage: ./filecheck <path/filename>"
	else:
		file.check(sys.argv[1])
		
if __name__ == "__main__":
	main()

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  #2  
Old January 25th, 2004, 10:36 PM
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SolarBear SolarBear is offline
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What error do you get ? Your script worked when I tried it (under Win XP though).

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  #3  
Old January 25th, 2004, 10:46 PM
XxChris XxChris is offline
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When I give it a filename that doesn't exist it still says it can read/write. When I type "fp =open("oiwjedoiwjed", "r") directly into the interpreter, I get an exception. But in my program the except: stuff doesn't run...

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  #4  
Old January 26th, 2004, 06:45 AM
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netytan netytan is offline
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Could have somthing to do with the filename you passing to your files. instead of using the variable 'filename' your passing in a string "filename"

Quote:
C:\Documents and Settings\Mark>cd desktop

C:\Documents and Settings\Mark\Desktop>checkfile.py new.txt
Can read from <open file 'new.txt', mode 'r' at 0x008F6F60>
Can write to <open file 'new.txt', mode 'w' at 0x008F6F60>


Code:
#!/usr/bin/env python

def check(path):
	
	"""
	Check a path to see if the file is readable/writable or not.
	"""
	
	try:
		print 'Can read from', file(path, 'r')
	except IOError:
		print 'Cannot read from', path
	
	try:
		print 'Can write to', file(path, 'w')
	except IOError:
		print 'Cannot write to', path

if __name__ == "__main__":
	
	import sys	
	
	if len(sys.argv) != 2:
		print 'Usage: ./filecheck <path/filename>'	
	else:
		check(sys.argv[1])


changed things around and it worked fine.. oh you really dont need a class there; people seems to use classes where a function would be fine, so not just you.

Mark.
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programming language development: www.netytan.com Hula


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  #5  
Old January 26th, 2004, 09:18 AM
XxChris XxChris is offline
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Thanks alot

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  #6  
Old January 26th, 2004, 10:03 AM
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netytan netytan is offline
Hello World :)
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No problem happy to help!

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