Microsoft Windows XP [Versione 5.1.2600] (C) Copyright 1985-2001 Microsoft Corp. C:\Documents and Settings\Studenti>"C:\Documents and Settings\Studenti\Documenti \Utenti\j\test3.py" Exception in Tkinter callback Traceback (most recent call last): File "C:\Documents and Settings\Studenti\Documenti\Utenti\j\PortablePython_1.1 _py2.5.4\App\lib\lib-tk\Tkinter.py", line 1414, in __call__ return self.func(*args) File "C:\Documents and Settings\Studenti\Documenti\Utenti\j\test3.py", line 14 2, in bin2txt num = getfloat(fileinput) File "C:\Documents and Settings\Studenti\Documenti\Utenti\j\test3.py", line 53 , in getfloat (thefloat,) = struct.unpack( 'f', fidin.read(4) ) # 'f' is float. File "C:\Documents and Settings\Studenti\Documenti\Utenti\j\PortablePython_1.1 _py2.5.4\App\lib\struct.py", line 87, in unpack return o.unpack(s) error: unpack requires a string argument of length 4