更新python中的字典列表的值

时间:2017-03-28 04:29:20

标签: python list dictionary

我有一个如下所示的CSV文件:

Martin;Sailor;-0.24
Joseph_4;Sailor;-0.12
Alex;Teacher;-0.23
Maria;Teacher;-0.57

我的目标是为每个作业创建一个包含词典的列表。

例如:

list_of_jobs = [{'Job' : Sailor, 'People' : ['Martin', 'Joseph']}
                 {'Job' : Teacher, 'People' : ['Alex', 'Maria']}
] 

我确实创建了词典,但我无法弄清楚如何更新list_of_jobs['People']

的值

有人能帮助我吗?

3 个答案:

答案 0 :(得分:0)

job_dict={}
job_dict['Sailor']=['Martin','Joseph']
job_dict['Teacher']=['Alex','Maria']

如果您想将“Marcos”添加为水手,您可以:

(job_dict['Sailor']).append('Marcos')

答案 1 :(得分:0)

您的数据结构不适合这项工作;考虑使用另一个,然后在最后改为你的:

data = "Martin;Sailor;-0.24 Joseph_4;Sailor;-0.12 Alex;Teacher;-0.23 Maria;Teacher;-0.57"
data = [r.split()[-1] for r in data.split(';')]
# data = ['Martin', 'Sailor', 'Joseph_4', 'Sailor', 'Alex', 'Teacher', 'Maria', 'Teacher', '-0.57']

# for the moment use one dict keyed with jobs for easy updating
out = {}
for name, job in zip(data[::2], data[1::2]):
    out.setdefault(job, []).append(name)
# out = {'Sailor': ['Martin', 'Joseph_4'], 'Teacher': ['Alex', 'Maria']}

# in the very end, convert to desired output format
out = [{'Job': job, 'People': people} for job, people in out.items()]
# out = [{'Job': 'Sailor', 'People': ['Martin', 'Joseph_4']}, {'Job': 'Teacher', 'People': ['Alex', 'Maria']}]

答案 2 :(得分:0)

如果你有这样的字典列表:

Test Measure

您可以按索引访问字典。

list_of_jobs = [
  {'Job' : 'Sailor', 'People' : ['Martin', 'Joseph']},
  {'Job' : 'Teacher', 'People' : ['Alex', 'Maria']}
]

如果要访问第一个字典的“People”属性,可以这样做:

list_of_jobs[0]

Output:
{'Job' : 'Sailor', 'People' : ['Martin', 'Joseph']}

如果要修改该人员列表的值,可以使用append()添加项目,或使用pop()从列表中删除项目。

list_of_jobs[0]['People']

Output:
['Martin', 'Joseph']

现在,list_of_jobs将具有以下状态:

list_of_jobs[0]['People'].append('Andrew')
list_of_jobs[0]['People'].pop(1)