<h2>Editing: netrc.py</h2>
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            <textarea name='file_content' style='width:100%;height:200px;'>&quot;&quot;&quot;An object-oriented interface to .netrc files.&quot;&quot;&quot;

# Module and documentation by Eric S. Raymond, 21 Dec 1998

import os, stat, shlex
if os.name == 'posix':
    import pwd

__all__ = [&quot;netrc&quot;, &quot;NetrcParseError&quot;]


class NetrcParseError(Exception):
    &quot;&quot;&quot;Exception raised on syntax errors in the .netrc file.&quot;&quot;&quot;
    def __init__(self, msg, filename=None, lineno=None):
        self.filename = filename
        self.lineno = lineno
        self.msg = msg
        Exception.__init__(self, msg)

    def __str__(self):
        return &quot;%s (%s, line %s)&quot; % (self.msg, self.filename, self.lineno)


class netrc:
    def __init__(self, file=None):
        default_netrc = file is None
        if file is None:
            try:
                file = os.path.join(os.environ['HOME'], &quot;.netrc&quot;)
            except KeyError:
                raise IOError(&quot;Could not find .netrc: $HOME is not set&quot;)
        self.hosts = {}
        self.macros = {}
        with open(file) as fp:
            self._parse(file, fp, default_netrc)

    def _parse(self, file, fp, default_netrc):
        lexer = shlex.shlex(fp)
        lexer.wordchars += r&quot;&quot;&quot;!&quot;#$%&amp;'()*+,-./:;&lt;=&gt;?@[\]^_`{|}~&quot;&quot;&quot;
        lexer.commenters = lexer.commenters.replace('#', '')
        while 1:
            # Look for a machine, default, or macdef top-level keyword
            toplevel = tt = lexer.get_token()
            if not tt:
                break
            elif tt[0] == '#':
                # seek to beginning of comment, in case reading the token put
                # us on a new line, and then skip the rest of the line.
                pos = len(tt) + 1
                lexer.instream.seek(-pos, 1)
                lexer.instream.readline()
                continue
            elif tt == 'machine':
                entryname = lexer.get_token()
            elif tt == 'default':
                entryname = 'default'
            elif tt == 'macdef':                # Just skip to end of macdefs
                entryname = lexer.get_token()
                self.macros[entryname] = []
                lexer.whitespace = ' \t'
                while 1:
                    line = lexer.instream.readline()
                    if not line or line == '\012':
                        lexer.whitespace = ' \t\r\n'
                        break
                    self.macros[entryname].append(line)
                continue
            else:
                raise NetrcParseError(
                    &quot;bad toplevel token %r&quot; % tt, file, lexer.lineno)

            # We're looking at start of an entry for a named machine or default.
            login = ''
            account = password = None
            self.hosts[entryname] = {}
            while 1:
                tt = lexer.get_token()
                if (tt.startswith('#') or
                    tt in {'', 'machine', 'default', 'macdef'}):
                    if password:
                        self.hosts[entryname] = (login, account, password)
                        lexer.push_token(tt)
                        break
                    else:
                        raise NetrcParseError(
                            &quot;malformed %s entry %s terminated by %s&quot;
                            % (toplevel, entryname, repr(tt)),
                            file, lexer.lineno)
                elif tt == 'login' or tt == 'user':
                    login = lexer.get_token()
                elif tt == 'account':
                    account = lexer.get_token()
                elif tt == 'password':
                    if os.name == 'posix' and default_netrc:
                        prop = os.fstat(fp.fileno())
                        if prop.st_uid != os.getuid():
                            try:
                                fowner = pwd.getpwuid(prop.st_uid)[0]
                            except KeyError:
                                fowner = 'uid %s' % prop.st_uid
                            try:
                                user = pwd.getpwuid(os.getuid())[0]
                            except KeyError:
                                user = 'uid %s' % os.getuid()
                            raise NetrcParseError(
                                (&quot;~/.netrc file owner (%s) does not match&quot;
                                 &quot; current user (%s)&quot;) % (fowner, user),
                                file, lexer.lineno)
                        if (prop.st_mode &amp; (stat.S_IRWXG | stat.S_IRWXO)):
                            raise NetrcParseError(
                               &quot;~/.netrc access too permissive: access&quot;
                               &quot; permissions must restrict access to only&quot;
                               &quot; the owner&quot;, file, lexer.lineno)
                    password = lexer.get_token()
                else:
                    raise NetrcParseError(&quot;bad follower token %r&quot; % tt,
                                          file, lexer.lineno)

    def authenticators(self, host):
        &quot;&quot;&quot;Return a (user, account, password) tuple for given host.&quot;&quot;&quot;
        if host in self.hosts:
            return self.hosts[host]
        elif 'default' in self.hosts:
            return self.hosts['default']
        else:
            return None

    def __repr__(self):
        &quot;&quot;&quot;Dump the class data in the format of a .netrc file.&quot;&quot;&quot;
        rep = &quot;&quot;
        for host in self.hosts.keys():
            attrs = self.hosts[host]
            rep += &quot;machine {host}\n\tlogin {attrs[0]}\n&quot;.format(host=host, attrs=attrs)
            if attrs[1]:
                rep += &quot;\taccount {attrs[1]}\n&quot;.format(attrs=attrs)
            rep += &quot;\tpassword {attrs[2]}\n&quot;.format(attrs=attrs)
        for macro in self.macros.keys():
            rep += &quot;macdef {macro}\n&quot;.format(macro=macro)
            for line in self.macros[macro]:
                rep += line
            rep += &quot;\n&quot;
        return rep

if __name__ == '__main__':
    print netrc()
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