gui: fix TypeError on unknown `len()`

- fixes #971
2020-06-28 21:12:31 +01:00 · 2020-06-28 21:12:31 +01:00 · 6e4b48cfcb
parent b18a31eb26
commit 6e4b48cfcb
1 changed files with 1 additions and 1 deletions
--- a/tqdm/gui.py
+++ b/tqdm/gui.py
@ -53,7 +53,7 @@ class tqdm_gui(std_tqdm):  # pragma: no cover
        self.mininterval = max(self.mininterval, 0.5)
        self.fig, ax = plt.subplots(figsize=(9, 2.2))
        # self.fig.subplots_adjust(bottom=0.2)
-        total = len(self)
+        total = self.__len__()  # avoids TypeError on None #971
        if total is not None:
            self.xdata = []
            self.ydata = []