Question

我对python dict update有疑问。我有两个字典，如下所述。

    dict1={1:{"partname": 'part1_item1' , 'archname':'sca_item1_rev1.0.jar','rev: '1.0', 'compname': item1},
           2:{"partname": 'part1_item2' , 'archname':'sca_item2_rev2.0.jar','rev: '2.0' ,'compname': item2},
           3:{"partname": 'part1_item3' , 'archname':'sca_item3_rev2.0.jar','rev: '2.0' ,'compname': item3}}
           
    dict2={item1:{'jarversion': '1.0', 'jarname':'item1', 'partition': 'item1'},
           item2:{'jarversion': '1.0', 'jarname':'item2', 'partition': 'item2'},
           item1:{'jarversion': '2.0', 'jarname':'item3', 'partition': 'item3'}}

我想将dict1的值（rev和jarname）与dict2进行比较，如果jatname和jar版本相同，那么我需要在dict1中使用'overwrite'：'true'

更新

如果两个版本都不相同并且找不到版本，那么我需要在dict1中使用'overwrite'：'false'更新

使用dict1尝试创建代码，如下所述

i=1
for root, dirs, files in os.walk(comp):
    if files:
        if i not in dict1.keys():
            dict1[i] = {}
        if '\\' in root:
            subdir=root.split('\\')[1]
        else:
            subdir=''
        dict1[i].update({"partname" : '', "archname": '', "compname":'', "rev": ''})
        if subdir:
            dict1[i].update({"partname" : '%s'%subdir })
            dict1[i].update({"archname": '', "compname":'', "rev": ''})
        for filename in files:
            if filename.endswith('.jar'):
                dict1[i].update({"archname": '%s'%filename,"compname": ('%s' %filename).split('sca_')[1].split('_rev')[0],"rev": ('%s' %filename).split('sca_')[1].split('_rev')[1].split('.jar')[0]})
            else:
                print("Unrecognised file: %s"%(filename))
        i=i+1

dict2已经创建。

我需要使用以下格式更新字典。

if dict1(compname)(rev) == dict2 (jarversion)(jarname)
    
    dict1={1:{"partname": 'part1_item1' , 'archname':'sca_item1_rev1.0.jar','rev: '1.0', 'compname': item1 , 'overwrite' :'true'}}
    
if dict1(compname)(rev) != dict2 (jarversion)(jarname)
    
    dict1={1:{"partname": 'part1_item1' , 'archname':'sca_item1_rev1.0.jar','rev: '1.0', 'compname': item1 , 'overwrite' :'false'}}

请帮助我如何使用此键（值）更新字典。

Answer 1

让我们尝试一下

# create a look-up set for unique (jarname + jarversion)
look_up = {v['jarname'] + v['jarversion'] for k, v in dict2.items()}

# use dict-comprehension for updating the values back to dict1
print(
    {k: {**v, **{"overwrite": v['compname'] + v['rev'] in look_up}}
     for k, v in dict1.items()}
)

EDIT ，较旧的python

look_up = set()

for _, v in dict2.items():
    look_up.add(v['jarname'] + v['jarversion'])

for k, v in dict1.items():
    dict1[k].update(
        {"overwrite": str(v['compname'] + v['rev'] in look_up).lower()}
    )

比较两个字典并更新第一个字典中的值

1 个答案: