aus einem Wörterbuch bestimmten Schlüsselwerte holen, die Werte in der Liste hat

Question

I Wörterbuch verfolgt haben, von dem ich nur 'tcase_name'

a = {'179781': [{'exec_id': '0', 
       'exec_on_build': '', 
       'exec_on_tplan': '', 
       'exec_status': 'n', 
       'execution_duration': '', 
       'execution_order': '1', 
       'execution_type': '2', 
       'external_id': '59', 
       'feature_id': '14799', 
       'full_external_id': 'TC-59', 
       'platform_id': '0', 
       'platform_name': '', 
       'status': '1', 
       'tc_id': '179781', 
       'tcase_id': '179781', 
       'tcase_name': 'test_20experiment', # HERE 
       'tcversion_id': '179782', 
       'tcversion_number': '', 
       'version': '1'}], 
    '179821': [{'exec_id': '68588', 
       'exec_on_build': '160', 
       'exec_on_tplan': '178775', 
       'exec_status': 'b', 
       'execution_duration': '0.00', 
       'execution_order': '1', 
       'execution_type': '2', 
       'external_id': '60', 
       'feature_id': '14800', 
       'full_external_id': 'TC-60', 
       'platform_id': '0', 
       'platform_name': '', 
       'status': '1', 
       'tc_id': '179821', 
       'tcase_id': '179821', 
       'tcase_name': 'test_22experiment', # AND HERE 
       'tcversion_id': '179822', 
       'tcversion_number': '1', 
       'version': '1'}]} 

Hier holen wollen, ist, was ich versucht:

>>> a.keys() 
['179821', '179781'] 

>>> a.values() 
[[{'tcase_id': '179821', 'status': '1', 'exec_id': '68588', 'tcversion_id': '179822', 'exec_on_tplan': '178775', 'version': '1', 'external_id': '60', 'tcversion_number': '1', 'tc_id': '179821', 'execution_type': '2', 'platform_id': '0', 'tcase_name': 'test_22experiment', 'execution_duration': '0.00', 'exec_on_build': '160', 'exec_status': 'b', 'full_external_id': 'TC-60', 'feature_id': '14800', 'execution_order': '1', 'platform_name': ''}], [{'tcase_id': '179781', 'status': '1', 'exec_id': '0', 'tcversion_id': '179782', 'exec_on_tplan': '', 'version': '1', 'external_id': '59', 'tcversion_number': '', 'tc_id': '179781', 'execution_type': '2', 'platform_id': '0', 'tcase_name': 'test_20experiment', 'execution_duration': '', 'exec_on_build': '', 'exec_status': 'n', 'full_external_id': 'TC-59', 'feature_id': '14799', 'execution_order': '1', 'platform_name': ''}]] 

>>> a.values()['tcase_name'] 
Traceback (most recent call last): 
    File "<stdin>", line 1, in <module> 
TypeError: list indices must be integers, not str 

Kann jemand schlagen Sie mir eine Möglichkeit vor, die erforderlichen Feldwerte aus diesem Wörterbuch zu erhalten?

Answer 1

Sie haben das Richtige getan. Wenn Sie das verschachtelte Wörterbuch nicht verstehen, drucken Sie es aus, um zu sehen, wie es strukturiert ist.

Hier ist eine Möglichkeit, Ihre Werte zu erhalten, die Sie manipulieren können, um zu bekommen, was immer Sie wollen.

for k,v in a.items(): # get the keys and values in the dict a. k, v are not special names. 
    for e in v:  # now lets get all of the elements in each value, which is a list of dicts 
     print(e.get('tcase_name')) # use the dict method get to retrieve the value for a particular key of interest.