[英]How would I put a dict {key: value} in it's designated key in a dictionary so that it is {key: {key: value}} after counting value
我有一个csv文件,我要在其中计算row[3]
然后将其与row[0]
row[0] row[3]
'A01' 'a'
'B02' 'a'
'A01' 'b'
'A01' 'a'
'B02' 'a'
'A01' 'a'
所以最后应该是
{'A01':{a:3, b:1, 'B02':{a,2}}
到目前为止,我有以下代码:
d = {'job': {'general_types': 0}}
d['job'] ={}
d['general_types'] ={}
with open("sample.csv", "r") as data1:
outcome_reader = csv.reader(data1)
for rows in outcome_reader:
d['job'].setdefault(rows[0])
d['general_type'].setdefault(rows[3],0)
d['general_type'][rows[3]] += 1
但是目前,我收到一个KeyError: 'general_type'
每当您从不存在的字典中请求密钥时,都会引发KeyError
。
看起来您在将密钥声明为'general_types'
,然后以名称'general_type'
进行请求。 尝试以下方法:
d['general_types'].setdefault(rows[3],0)
d['general_types'][rows[3]] += 1
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