accept backends name with only letters and digits

weboob/tools/application/qt/backendcfg.py

@@ -21,6 +21,7 @@ from PyQt4.QtGui import QDialog, QTreeWidgetItem, QLabel, QFormLayout, \
                         QDialogButtonBox
 from PyQt4.QtCore import SIGNAL, Qt, QVariant, QUrl
 
+import re
 from logging import warning
 
 from weboob.capabilities.account import ICapAccount, Account, AccountRegisterError
@@ -206,6 +207,11 @@ class BackendCfg(QDialog):
                                        self.tr('Please specify a backend name'))
             return
 
+        if self.ui.nameEdit.isEnabled() and not re.match(r'^[\w\-_]+$', bname):
+            QMessageBox.critical(self, self.tr('Invalid value'),
+                                       self.tr('The backend name can only contain letters and digits'))
+            return
+
         if self.ui.proxyBox.isChecked():
             params['_proxy'] = unicode(self.ui.proxyEdit.text())
             if not params['_proxy']:

weboob/tools/application/repl.py

@@ -241,7 +241,7 @@ class ReplApplication(Cmd, BaseApplication):
         except BackendAlreadyExists:
             print 'Backend "%s" is already configured in file "%s"' % (name, self.weboob.backends_config.confpath)
             while self.ask('Add new instance of "%s" backend?' % name, default=False):
-                new_name = self.ask('Please give new instance name (could be "%s_1")' % name, regexp=u'^[\d\w_-]+$')
+                new_name = self.ask('Please give new instance name (could be "%s_1")' % name, regexp=r'^[\w\-_]+$')
                 try:
                     self.weboob.backends_config.add_backend(new_name, name, params)
                     print 'Backend "%s" successfully added.' % new_name