tfix #3601 - electrum - Electrum Bitcoin wallet
 (HTM) git clone https://git.parazyd.org/electrum
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       ---
 (DIR) commit c37608dd5e30e4aefbc9a10531352cc360ab3808
 (DIR) parent 13bf539d175d7d97b9d55453892d380107a4fa8b
 (HTM) Author: SomberNight <somber.night@protonmail.com>
       Date:   Mon, 25 Dec 2017 20:52:44 +0100
       
       fix #3601
       
       Diffstat:
         M gui/kivy/main_window.py             |       5 +++++
       
       1 file changed, 5 insertions(+), 0 deletions(-)
       ---
 (DIR) diff --git a/gui/kivy/main_window.py b/gui/kivy/main_window.py
       t@@ -943,9 +943,14 @@ class ElectrumWindow(App):
                self._password_dialog.open()
        
            def export_private_keys(self, pk_label, addr):
       +        if self.wallet.is_watching_only():
       +            self.show_info(_('This is a watching-only wallet. It does not contain private keys.'))
       +            return
                def show_private_key(addr, pk_label, password):
                    if self.wallet.has_password() and password is None:
                        return
       +            if not self.wallet.can_export():
       +                return
                    key = str(self.wallet.export_private_key(addr, password)[0])
                    pk_label.data = key
                self.protected(_("Enter your PIN code in order to decrypt your private key"), show_private_key, (addr, pk_label))