我有一个如下列表,
list_ = [('a', 5), ('a', 6), ('a', 8), ('a', 2), ('a', 5), ('a', 9), ('a', 10),
('b', 3), ('b', 7), ('b', 6), ('b', 2), ('b', 6), ('b', 5), ('b', 10)]
我想做以下操作。如果元组中的值增加,我必须跟踪增量,如果它减少,我必须跟踪减量,最后我需要两者的总和。
# for key 'a' for example
# increment decrement
# 1 6
# 2
# 3
# 4
# 1
# Hence total increment is 11 and decrement is 6
# so I need the result like this. ('a', (11, 6))
例如,我确实喜欢这样做以获得增量,但没有工作。
from collections import defaultdict
d = defaultdict(list)
for k, v in list_:
d[k].append(v)
counter1 = 0
for key, value in d.items():
for i in range(len(value)):
try:
if value[i] < value[i+1]:
s = value[i+1] - value[i]
counter1 +=s
except:
pass
print(counter1)