move import of tqdm up

package/MDAnalysis/analysis/msd.py

@@ -250,6 +250,7 @@
 from ..due import due, Doi
 from .base import AnalysisBase
 from ..core import groups
+from tqdm import tqdm
 
 logger = logging.getLogger('MDAnalysis.analysis.msd')
 
@@ -387,9 +388,6 @@ def _conclude_simple(self):
         """
         lagtimes = np.arange(1, self.n_frames)
         positions = self._position_array.astype(np.float64)
-
-        # progressbar
-        from tqdm import tqdm
         for lag in tqdm(lagtimes):
             disp = positions[:-lag, :, :] - positions[lag:, :, :]
             sqdist = np.square(disp).sum(axis=-1)
@@ -414,9 +412,6 @@ def _conclude_fft(self):  # with FFT, np.float64 bit prescision required.
                 or set fft=False""")
 
         positions = self._position_array.astype(np.float64)
-
-        # progressbar
-        from tqdm import tqdm
         for n in tqdm(range(self.n_particles)):
             self.results.msds_by_particle[:, n] = tidynamics.msd(
                 positions[:, n, :])