move gui deprecation warning to display()

setup.cfg

@@ -96,7 +96,6 @@ classifiers =
     Topic :: System :: Shells
     Topic :: Terminals
     Topic :: Utilities
-
 [options]
 setup_requires = setuptools>=42; setuptools_scm[toml]>=3.4
 python_requires = >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*

tqdm/std.py

@@ -1145,12 +1145,6 @@ def __iter__(self):
         avg_time = self.avg_time
         time = self._time
 
-        if getattr(self, 'sp', None) is None:
-            raise TqdmDeprecationWarning(
-                "Please use `tqdm.gui.tqdm(...)` instead of"
-                " `tqdm(..., gui=True)`\n",
-                fp_write=getattr(self.fp, 'write', sys.stderr.write))
-
         try:
             for obj in iterable:
                 yield obj
@@ -1253,12 +1247,6 @@ def update(self, n=1):
                     rate = delta_t / delta_it
                     self.avg_time = self.ema(rate, self.avg_time, self.smoothing)
 
-                if not hasattr(self, "sp"):
-                    raise TqdmDeprecationWarning(
-                        "Please use `tqdm.gui.tqdm(...)`"
-                        " instead of `tqdm(..., gui=True)`\n",
-                        fp_write=getattr(self.fp, 'write', sys.stderr.write))
-
                 self.refresh(lock_args=self.lock_args)
 
                 # If no `miniters` was specified, adjust automatically to the
@@ -1495,6 +1483,12 @@ def display(self, msg=None, pos=None):
             if msg or msg is None:  # override at `nrows - 1`
                 msg = " ... (more hidden) ..."
 
+        if not hasattr(self, "sp"):
+            raise TqdmDeprecationWarning(
+                "Please use `tqdm.gui.tqdm(...)`"
+                " instead of `tqdm(..., gui=True)`\n",
+                fp_write=getattr(self.fp, 'write', sys.stderr.write))
+
         if pos:
             self.moveto(pos)
         self.sp(self.__repr__() if msg is None else msg)