[英]counting occurrences in list of list
为什么这不起作用? 我在 Stack Overflow 上找到了写在下面的函数,但它仍然不起作用。
理想情况下,我想找出单词在内部列表中出现的次数以及所有单词在所有列表中出现的次数。 因此,对于 'das' - 它在列表的第一个列表中出现两次,总共出现 3 次:
from collections import Counter
from collections import defaultdict
import numpy
import operator
import pandas
a = [['das','sadad','asdas','das'],['das','sadad','da'],['aaa','8.9']]
def counter(a):
return Counter(a)
def count(a):
return dict((i, a.count(i)) for i in set(a))
def bincount(a):
return numpy.bincount(a)
def pandas_value_counts(a):
return pandas.Series(a).value_counts()
def occur_dict(a):
d = {}
for i in a:
if i in d:
d[i] = d[i]+1
else:
d[i] = 1
return d
def count_unsorted_list_items(items):
counts = defaultdict(int)
for item in items:
counts[item] += 1
return dict(counts)
def operator_countof(a):
return dict((i, operator.countOf(a, i)) for i in set(a))
occur_dict(a)
pandas_value_counts(a)
count_unsorted_list_items(a)
bincount(a)
count(a)
counter(a)
operator_countof(a)
我得到的错误是:
Traceback (most recent call last):
File "it.py", line 45, in <module>
occur_dict(a)
File "it.py", line 28, in occur_dict
if i in d:
TypeError: unhashable type: 'list'
我们有一些列表a
。 我们想要获得每个子列表的计数,以及这些计数的总数。 请注意,总计数将只是子列表计数的总和。
from collections import Counter
a = [['das','sadad','asdas','das'],['das','sadad','da'],['aaa','8.9']]
def count(list_of_lists):
counts = [Counter(sublist) for sublist in list_of_lists]
total_count = sum(counts, Counter())
return counts, total_count
现在,如果我们想要第一个子列表中的das
计数以及所有子列表中的das
数量,我们可以这样做
counts, total = count(a)
print(counts[0]['das'])
# 2
print(total['das'])
# 3
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