D:\Programs\web.py-project>pip list
Package    Version
---------- ---------
pip        10.0.1
setuptools 39.0.1
web.py     0.40.dev1

D:\Programs\web.py-project>python hello.py
Traceback (most recent call last):
  File "D:\Programs\Python\Python37\lib\site-packages\web\utils.py", line 526, in take
    yield next(seq)
StopIteration

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "hello.py", line 6, in <module>
    app = web.application(urls, globals())
  File "D:\Programs\Python\Python37\lib\site-packages\web\application.py", line 62, in __init__
    self.init_mapping(mapping)
  File "D:\Programs\Python\Python37\lib\site-packages\web\application.py", line 130, in init_mapping
    self.mapping = list(utils.group(mapping, 2))
  File "D:\Programs\Python\Python37\lib\site-packages\web\utils.py", line 531, in group
    x = list(take(seq, size))
RuntimeError: generator raised StopIteration