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fileinput.pyo
� 2Y~gc @ s� d Z d d l Z d d l Z d d d d d d d d d g Z d a d Z d d d d d d d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d d d � � YZ d � Z d � Z d � Z e d k r� e � n d S(! s� Helper class to quickly write a loop over all standard input files. Typical use is: import fileinput for line in fileinput.input(): process(line) This iterates over the lines of all files listed in sys.argv[1:], defaulting to sys.stdin if the list is empty. If a filename is '-' it is also replaced by sys.stdin. To specify an alternative list of filenames, pass it as the argument to input(). A single file name is also allowed. Functions filename(), lineno() return the filename and cumulative line number of the line that has just been read; filelineno() returns its line number in the current file; isfirstline() returns true iff the line just read is the first line of its file; isstdin() returns true iff the line was read from sys.stdin. Function nextfile() closes the current file so that the next iteration will read the first line from the next file (if any); lines not read from the file will not count towards the cumulative line count; the filename is not changed until after the first line of the next file has been read. Function close() closes the sequence. Before any lines have been read, filename() returns None and both line numbers are zero; nextfile() has no effect. After all lines have been read, filename() and the line number functions return the values pertaining to the last line read; nextfile() has no effect. All files are opened in text mode by default, you can override this by setting the mode parameter to input() or FileInput.__init__(). If an I/O error occurs during opening or reading a file, the IOError exception is raised. If sys.stdin is used more than once, the second and further use will return no lines, except perhaps for interactive use, or if it has been explicitly reset (e.g. using sys.stdin.seek(0)). Empty files are opened and immediately closed; the only time their presence in the list of filenames is noticeable at all is when the last file opened is empty. It is possible that the last line of a file doesn't end in a newline character; otherwise lines are returned including the trailing newline. Class FileInput is the implementation; its methods filename(), lineno(), fileline(), isfirstline(), isstdin(), nextfile() and close() correspond to the functions in the module. In addition it has a readline() method which returns the next input line, and a __getitem__() method which implements the sequence behavior. The sequence must be accessed in strictly sequential order; sequence access and readline() cannot be mixed. Optional in-place filtering: if the keyword argument inplace=1 is passed to input() or to the FileInput constructor, the file is moved to a backup file and standard output is directed to the input file. This makes it possible to write a filter that rewrites its input file in place. If the keyword argument backup=".<some extension>" is also given, it specifies the extension for the backup file, and the backup file remains around; by default, the extension is ".bak" and it is deleted when the output file is closed. In-place filtering is disabled when standard input is read. XXX The current implementation does not work for MS-DOS 8+3 filesystems. XXX Possible additions: - optional getopt argument processing - isatty() - read(), read(size), even readlines() i����Nt inputt closet nextfilet filenamet linenot filelinenot isfirstlinet isstdint FileInputi i i t t rc C s: t r t j r t d � n t | | | | | | � a t S( s Return an instance of the FileInput class, which can be iterated. The parameters are passed to the constructor of the FileInput class. The returned instance, in addition to being an iterator, keeps global state for the functions of this module,. s input() already active( t _statet _filet RuntimeErrorR ( t filest inplacet backupt bufsizet modet openhook( ( s. /opt/alt/python27/lib64/python2.7/fileinput.pyR U s c C s# t } d a | r | j � n d S( s Close the sequence.N( R t NoneR ( t state( ( s. /opt/alt/python27/lib64/python2.7/fileinput.pyR c s c C s t s t d � n t j � S( s� Close the current file so that the next iteration will read the first line from the next file (if any); lines not read from the file will not count towards the cumulative line count. The filename is not changed until after the first line of the next file has been read. Before the first line has been read, this function has no effect; it cannot be used to skip the first file. After the last line of the last file has been read, this function has no effect. s no active input()( R R R ( ( ( s. /opt/alt/python27/lib64/python2.7/fileinput.pyR k s c C s t s t d � n t j � S( sr Return the name of the file currently being read. Before the first line has been read, returns None. s no active input()( R R R ( ( ( s. /opt/alt/python27/lib64/python2.7/fileinput.pyR y s c C s t s t d � n t j � S( s� Return the cumulative line number of the line that has just been read. Before the first line has been read, returns 0. After the last line of the last file has been read, returns the line number of that line. s no active input()( R R R ( ( ( s. /opt/alt/python27/lib64/python2.7/fileinput.pyR � s c C s t s t d � n t j � S( s� Return the line number in the current file. Before the first line has been read, returns 0. After the last line of the last file has been read, returns the line number of that line within the file. s no active input()( R R R ( ( ( s. /opt/alt/python27/lib64/python2.7/fileinput.pyR � s c C s t s t d � n t j � S( sg Return the file number of the current file. When no file is currently opened, returns -1. s no active input()( R R t fileno( ( ( s. /opt/alt/python27/lib64/python2.7/fileinput.pyR � s c C s t s t d � n t j � S( se Returns true the line just read is the first line of its file, otherwise returns false. s no active input()( R R R ( ( ( s. /opt/alt/python27/lib64/python2.7/fileinput.pyR � s c C s t s t d � n t j � S( s] Returns true if the last line was read from sys.stdin, otherwise returns false. s no active input()( R R R ( ( ( s. /opt/alt/python27/lib64/python2.7/fileinput.pyR � s c B s� e Z d Z d d d d d d d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z RS( s= FileInput([files[, inplace[, backup[, bufsize[, mode[, openhook]]]]]]) Class FileInput is the implementation of the module; its methods filename(), lineno(), fileline(), isfirstline(), isstdin(), fileno(), nextfile() and close() correspond to the functions of the same name in the module. In addition it has a readline() method which returns the next input line, and a __getitem__() method which implements the sequence behavior. The sequence must be accessed in strictly sequential order; random access and readline() cannot be mixed. i R R c C s& t | t � r | f } n7 | d k r7 t j d } n | sF d } n t | � } | | _ | | _ | | _ d | _ d | _ d | _ d | _ d | _ d | _ t | _ d | _ | d k r� t d � � n | | _ | r� | r� t d � � n% | rt | d � rt d � � n | | _ d S( Ni t -i R t rUt Ut rbs= FileInput opening mode must be one of 'r', 'rU', 'U' and 'rb's4 FileInput cannot use an opening hook in inplace modet __call__s# FileInput openhook must be callable( R ( R R R R ( t isinstancet basestringR t syst argvt tuplet _filest _inplacet _backupt _savestdoutt _outputt _filenamet _startlinenot _filelinenoR t Falset _isstdint _backupfilenamet ValueErrort _modet hasattrt _openhook( t selfR R R R R R ( ( s. /opt/alt/python27/lib64/python2.7/fileinput.pyt __init__� s4 c C s | j � d S( N( R ( R0 ( ( s. /opt/alt/python27/lib64/python2.7/fileinput.pyt __del__� s c C s z | j � Wd d | _ Xd S( N( ( R R! ( R0 ( ( s. /opt/alt/python27/lib64/python2.7/fileinput.pyR � s c C s | S( N( ( R0 ( ( s. /opt/alt/python27/lib64/python2.7/fileinput.pyt __iter__� s c C sL xE | j � } | r( | j d 7_ | S| j s: t � n | j � q Wd S( Ni ( t _readlineR( R t StopIterationR ( R0 t line( ( s. /opt/alt/python27/lib64/python2.7/fileinput.pyt next� s c C sM | | j � k r t d � n y | j � SWn t k rH t d � n Xd S( Ns accessing lines out of orders end of input reached( R R R7 R5 t IndexError( R0 t i( ( s. /opt/alt/python27/lib64/python2.7/fileinput.pyt __getitem__� s c C s� | j } d | _ | r$ | t _ n | j } d | _ z | rL | j � n Wd | j } d | _ y | ` Wn t k r n Xz! | r� | j r� | j � n Wd | j } d | _ | r� | j r� y t j | � Wq� t k r� q� Xn t | _ XXd S( Ni ( R$ R t stdoutR% R R R R4 t AttributeErrorR* R+ R# t ost unlinkt OSErrorR) ( R0 t savestdoutt outputt filet backupfilename( ( s. /opt/alt/python27/lib64/python2.7/fileinput.pyR � s4 c C sG x@ | j � } | r( | j d 7_ | S| j s5 | S| j � q Wd S( Ni ( R4 R( R R ( R0 R6 ( ( s. /opt/alt/python27/lib64/python2.7/fileinput.pyt readline s c C sH | j s d S| j d | _ | j d | _ | j � | _ d | _ d | _ t | _ d | _ | j d k r� d | _ t j | _ t | _ n�| j r�| j | j p� t j d | _ y t j | j � Wn t j k r� n Xt j | j | j � t | j | j � | _ y t j | j j � � j } Wn& t k rYt | j d � | _ n| Xt j | j t j t j Bt j B| � } t j | d � | _ y) t t d � r�t j | j | � n Wn t k r�n Xt j! | _" | j t _! n? | j# r| j# | j | j � | _ n t | j | j � | _ | j j$ | _% | j% � S( NR i i R s <stdin>t bakt wt chmod(& R! 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