Unused variable 'k'
58 Group a list of integers into sub-lists.
59 e.g. [1,2,3,5,6,7,9]: [[1,2,3],[5,6,7],[9]]
60 """
61 for k, g in groupby(enumerate(data), lambda x: x[0] - x[1]):62 yield list(map(itemgetter(1), g))
Description
An unused variable takes up space in the code, and can lead to confusion, and it should be removed. If this variable is necessary, name the variable _ to indicate that it will be unused, or start the name with unused or _unused.
Bad practice
def update():
for i in range(10): # Usused variable `i`
time.sleep(0.01)
display_result()
Preferred:
def update():
for _ in range(10):
time.sleep(0.01)
display_result()