importing tqdm.auto is very slow due to ipython completion initialization

[jamescasbon]

• I have visited the source website, and in particular
  read the known issues
• I have searched through the issue tracker for duplicates
• I have mentioned version numbers, operating system and
  environment, where applicable:

  import tqdm, sys
  print(tqdm.__version__, sys.version, sys.platform)

$ cat i.py                                                                                                               
from tqdm.auto import trange

 $ python -m cProfile -o istats i.py
$ python -m pstats istats                                                                                                 (tge)  (2s 833ms)  
Welcome to the profile statistics browser.
istats% sort time 
istats% stats 10
Mon Apr  8 09:13:08 2019    istats

         2604401 function calls (2598194 primitive calls) in 2.625 seconds

   Ordered by: internal time
   List reduced from 3049 to 10 due to restriction <10>

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        1    1.311    1.311    2.066    2.066 /home/james/.conda/envs/tge/lib/python3.6/site-packages/IPython/core/completer.py:103(<module>)
  1114112    0.412    0.000    0.412    0.000 {built-in method unicodedata.name}
  1114613    0.228    0.000    0.228    0.000 {built-in method builtins.chr}
      492    0.080    0.000    0.080    0.000 {built-in method marshal.loads}
1492/1489    0.045    0.000    0.171    0.000 {built-in method builtins.__build_class__}
    647/1    0.026    0.000    2.626    2.626 {built-in method builtins.exec}
     5616    0.022    0.000    0.037    0.000 <frozen importlib._bootstrap_external>:57(_path_join)
   134990    0.020    0.000    0.020    0.000 {method 'append' of 'list' objects}
     2396    0.020    0.000    0.020    0.000 {built-in method posix.stat}
      808    0.020    0.000    0.020    0.000 {built-in method __new__ of type object at 0x5629e0adae00}

[jamescasbon]

In [3]: tqdm.version
Out[3]: '4.31.1'