In [1]:

    

f = open('myfile.txt', 'w')


    

In [3]:

    

print dir(f)


    

    




['__class__', '__delattr__', '__doc__', '__enter__', '__exit__', '__format__', '__getattribute__', '__hash__', '__init__', '__iter__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 'close', 'closed', 'encoding', 'errors', 'fileno', 'flush', 'isatty', 'mode', 'name', 'newlines', 'next', 'read', 'readinto', 'readline', 'readlines', 'seek', 'softspace', 'tell', 'truncate', 'write', 'writelines', 'xreadlines']

In [4]:

    

f.write("this is python classs\n")
f.write("this class staRTS at 08:45 AM")


    

In [5]:

    

f.close()


    

In [6]:

    

f = open('myfile.txt', 'w')
f.write("this is python classs\n")
f.close()


    

In [7]:

    

f = open('myfile.txt', 'a')
f.write("this is python classs\n")
f.close()


    

In [8]:

    

f = open('myfile.txt', 'w')
f.write("this is python classs\n")


    

In [9]:

    

f.flush()


    

In [10]:

    

f.closed


    

    
Out[10]:





False

In [11]:

    

f.close()


    

In [12]:

    

f = open('myfile.txt', 'w')
f.write("this is python classs\n")


    

In [14]:

    

f.tell()


    

    
Out[14]:





23L

In [15]:

    

len("this is python classs\n")


    

    
Out[15]:





22

In [16]:

    

f.seek.__doc__


    

    
Out[16]:





'seek(offset[, whence]) -> None.  Move to new file position.\n\nArgument offset is a byte count.  Optional argument whence defaults to\n0 (offset from start of file, offset should be >= 0); other values are 1\n(move relative to current position, positive or negative), and 2 (move\nrelative to end of file, usually negative, although many platforms allow\nseeking beyond the end of a file).  If the file is opened in text mode,\nonly offsets returned by tell() are legal.  Use of other offsets causes\nundefined behavior.\nNote that not all file objects are seekable.'

In [17]:

    

f.seek(0)


    

In [18]:

    

f.tell()


    

    
Out[18]:





0L

In [19]:

    

f.write("this class staRTS at 08:45 AM")


    

In [20]:

    

f.close()


    

In [21]:

    

f = open('myfile.txt', 'a')
f.write("this is python classs\n")
f.close()


    

In [22]:

    

f = open('myfile.txt', 'r')


    

In [23]:

    

f.read()


    

    
Out[23]:





'this class staRTS at 08:45 AMthis is python classs\n'

In [24]:

    

f.close()


    

In [25]:

    

f = open('myfile.txt', 'r')
f.tell()


    

    
Out[25]:





0L

In [26]:

    

f.seek(20)


    

In [27]:

    

f.tell()


    

    
Out[27]:





20L

In [28]:

    

f.read()


    

    
Out[28]:





' 08:45 AMthis is python classs\n'

In [29]:

    

f.close()


    

In [ ]: