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December 11th, 2003, 02:30 AM

xlordt

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errors

OK I'm trying to code new stuff in new ways for experience before i can get to code something good.. anyways.. here is my code

Code:

class TCP:
      def __init__( self, host, port ):

          self = socket( AF_INET, SOCK_STREAM )
          self.connect(( "%s", "%d" )) % ( host, port )

          self.send( 'GET /index.php/HTML/1.1 \n\r\n\r' )
          print self.recv( 1025 )
         
         
if __name__ == '__main__':

   print 'Enter host name to connect to'
   print '> '
   connection = raw_input( )
   
   print 'Enter port number'
   ports = raw_input( )
   
   con = TCP( connection, ports )

and here is my error

Code:

Traceback (most recent call last):
  File "scripts/ftp.py", line 23, in ?
    con = TCP( connection, ports )
  File "scripts/ftp.py", line 9, in __init__
    self.connect(( "%s", "%d" )) % ( host, port )
  File "<string>", line 1, in connect
TypeError: an integer is required

can anyone tell me why i keep getting that err? i am providing an integer as a port number

December 11th, 2003, 02:50 AM

netytan

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But your not, you inserting an ind %d into a string, but the value is still a string

. Also add the fact that raw_input always returns a string and you have your problem i.e.

>>> '%d' % 50
'50'
>>> raw_input('Number please: ')
Number please: 50
'50'
>>>

you could replace connect with something like this...

...
self.connect((host, int(port)))
...

Mark.

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December 11th, 2003, 02:57 AM

xlordt

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hmm thats weird i tested it that way before and it didnt work! hmm thanx again life-saver

December 11th, 2003, 03:14 AM

xlordt

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btw how can this part work

Code:

class TCP:
      def __init__( self, host, port ):

          self = socket( AF_INET, SOCK_STREAM )
          self.connect(( host, int( port )))

          self.send( 'GET /index.php/HTML/1.1 \n\r\n\r' )

      def __str__( self ):

          print self.recv( 1025 )

December 11th, 2003, 03:33 AM

Grim Archon

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It's a "free" world. Do what you like but leave self alone or you'll regret it later. The run-time system will send the boys around

Code:

>>> class fred:
	def __init__(self):
		print "It's me %s"%(self,)

>>> a = fred()
It's me <__main__.fred instance at 0x00A36328>
>>> a
<__main__.fred instance at 0x00A36328>
>>> a.self

Traceback (most recent call last):
  File "<pyshell#9>", line 1, in -toplevel-
    a.self
AttributeError: fred instance has no attribute 'self'
>>>

Grim.

December 11th, 2003, 03:43 AM

xlordt

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heh?

why

btw.. can you tell me why my _str__ is not working.. arg it suppost to work

December 11th, 2003, 05:45 AM

Grim Archon

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Hi,
self is a psuedo variable created by the run-time system and acts as a pointer to the object instance.

Code:

class MyClass:
	def __init__(self, number):
		self.apples = number

a = MyClass(10)
b = MyClass (3)
print a.apples, b.apples

self is a bit like like the this variable in C++. In the above example both a and b have an attribute called apples, they are both derived from the MyClass but the quantity of apples is unique to each.

This code works for me:

Code:

import socket
class myTCP:
	def __init__(self,host,port):
		print "Making connection..."
		self.connection = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
		self.connection.connect((host,port))
		self.connection.send("GET /index.html/HTML/1.1 \n\r\n\r")
		print "Sent GET"

	def output(self):
		return self.connection.recv(1024)
con = myTCP("www.bbc.co.uk",80)
print con.output()

Grim

December 11th, 2003, 05:53 AM

Grim Archon

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and the string representation:

Code:

	def __str__(self):
		return self.connection.recv(1024)
con = myTCP("www.bbc.co.uk",80)
print con

December 11th, 2003, 06:07 AM

xlordt

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ahh cool cool im assuming that connection is a variable

#10

December 11th, 2003, 06:25 AM

Grim Archon

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Yep!
self.connection is a variable (attribute) of the con instance of class MyTCP. I could of called it anything I liked of course:

Code:

self.my_connection_to_the_server = .....

#11

December 11th, 2003, 08:43 AM

netytan

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Ok, i think i should mention that self is optional so you can use whatever name you like i.e. this... however Python standards are too use self so please do

Also, Pythons style guide/standard is to NOT put spaces directly inside brackets i.e raw_input( 'something' ), its up to you whether you follow them though

http://www.python.org/doc/essays/styleguide.html

X: the reason you need to call int() on port is that connect takes a tuple of (host_as_string, port_as_int). raw_input() returns a string so you have to change its type of connect will barf!

Mark.

#12

December 11th, 2003, 08:50 AM

xlordt

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yes and i reolized that .. just weird that i did it that way before but didnt work.. not it does.. thanx

#13

December 11th, 2003, 02:58 PM

Grim Archon

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xlordt,
Not the best code in the world but it shows a way you might synchronise the copy between to PC's. It is not something to build a site on

You should look into the socket exceptions rather than the slap-dash stuff I've put here. I would really consider doing proper ftp - because although that has more coding overhead it at least handles error situations - this code does not.

not so Grim