[英]Accessing Top-level function parameters within a Nested Function
我的generate_report
函數有2個參數。 在generate_report
函數中,我還有另一個名為generate_sub_report
函數。 我想在generate_sub_report
使用參數report_type
和date_range
。
def generate_report(report_type, date_range):
with open('file.csv') as f:
# do some stuff
def generate_sub_report():
report_map = {'Budget': ['a', 'b', 'c'], 'Finance': ['d', 'e', 'f']}
get_list_from_dict = report_map.get(report_type)
if date_range == 'Summary':
columns = ...
如何在generate_sub_report
使用函數參數report_type
和date_range
? 我想說的是,我如何才能讓generate_sub_report
繼承參數generate_report
?
編輯/更新的問題
運行下面的代碼。
它拋出: UnboundLocalError: local variable 'date_range' referenced before assignment
如果我更改def get_keyword_report_request(report_type, date_range):
考慮到也許我必須通過嵌套函數傳遞參數,則它會拋出:
TypeError: get_keyword_report_request() missing 2 required positional arguments: 'report_type' and 'date_range'
def generate_report(report_type, date_range):
def get_keyword_report_request():
columns_map = {
"Account": ["AccountName", "AccountId", "Impressions", "Clicks", "Spend",
"Conversions"],
"Campaign": ["AccountName", "AccountId", "CampaignName", "Status", "Impressions",
"Clicks", "Spend", "Conversions"],
"Keyword": ["AccountName", "AccountId", "CampaignName", "CampaignStatus",
"AdGroupName", "AdGroupStatus", "Keyword", "KeywordStatus",
"BidMatchType", "CurrentMaxCpc", "Impressions", "Clicks", "Spend",
"AveragePosition", "Conversions"],
"Ad group": ["AccountName", "AccountId", "CampaignName", "AdGroupName", "Status",
"Impressions", "Clicks", "Spend", "AveragePosition", "Conversions"],
"Search Query": ["AccountName", "AccountId", "CampaignName", "CampaignStatus",
"AdGroupName", "SearchQuery", "Keyword", "BidMatchType",
"DeliveredMatchType", "Impressions", "Clicks", "Spend",
"AveragePosition", "Conversions"],
"Ad": ["AccountName", "AccountId", "CampaignName", "AdGroupName", "Status",
"AdTitle", "AdDescription", "DisplayUrl", "DestinationUrl", "AdStatus",
"Impressions", "Clicks", "Spend", "AveragePosition", "Conversions"]
}
columns = columns_map.get(report_type)
if isinstance(date_range, list):
# do this
print('wha')
elif isinstance(date_range, str):
date_range = date_range
print(date_range)
return(date_range, report_type)
get_keyword_report_request()
generate_report('Keyword', 'Summary')
我最初的問題仍然存在:如何在較大函數的嵌套/內部函數中使用頂級函數的參數? 這可能是非常基礎的,我可能是個白痴,對此表示贊同。 我顯然不了解非常基本的內容。 很抱歉最初缺乏清晰性。
report_type
已經可用於generate_subreport
因為它是自動捕獲的。 這是證明:
>>> def generate_report(report_type):
... def generate_subreport():
... print "the report type is " + report_type
... generate_subreport()
...
>>> generate_report('Big Report')
the report type is Big Report
>>> generate_report('Small Report')
the report type is Small Report
>>>
恭喜,您遇到了一種已知的Python疣。 假定所有分配的變量都是局部變量 。
這有效:
>>> def generate_report(date_range):
... def get_keyword_report_request():
... print date_range
... get_keyword_report_request()
...
>>> generate_report('Annually')
Annually
但這失敗了
>> def generate_report(date_range):
... def get_keyword_report_request():
... print date_range
... date_range = 'Monthly' # one extra line
... get_keyword_report_request()
...
>>> generate_report('Annually')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 5, in generate_report
File "<stdin>", line 3, in get_keyword_report_request
UnboundLocalError: local variable 'date_range' referenced before assignment
Python看到您要在內部函數中分配給date_range變量,並決定需要在內部函數中聲明一個新的date_range
局部變量,並且當您調用print date_range
,它會拋出錯誤,因為內部date_range
沒有尚未初始化。
您的解決方法-是刪除date_range = date_range
分配。 它絕對不做任何事情。
def generate_report(report_type, date_range):
def get_keyword_report_request():
columns_map = {'Account': ['AccountName', 'AccountId', 'Impressions', 'Clicks', 'Spend', 'Conversions'],
'Campaign': ['AccountName', 'AccountId', 'CampaignName', 'Status', 'Impressions', 'Clicks', 'Spend', 'Conversions'],
'Ad group': ['AccountName', 'AccountId', 'CampaignName', 'AdGroupName', 'Status', 'Impressions', 'Clicks', 'Spend', 'AveragePosition', 'Conversions'], #Adgroup status?
'Ad': ['AccountName', 'AccountId', 'CampaignName', 'AdGroupName', 'Status', 'AdTitle', 'AdDescription', 'DisplayUrl', 'DestinationUrl', 'AdStatus', 'Impressions', 'Clicks', 'Spend', 'AveragePosition', 'Conversions'],
'Keyword': ['AccountName', 'AccountId', 'CampaignName', 'CampaignStatus', 'AdGroupName', 'AdGroupStatus', 'Keyword', 'KeywordStatus', 'BidMatchType', 'CurrentMaxCpc', 'Impressions', 'Clicks', 'Spend', 'AveragePosition', 'Conversions'],
'Search Query': ['AccountName', 'AccountId', 'CampaignName', 'CampaignStatus', 'AdGroupName', 'SearchQuery', 'Keyword', 'BidMatchType', 'DeliveredMatchType', 'Impressions', 'Clicks', 'Spend', 'AveragePosition', 'Conversions']
}
columns = columns_map.get(report_type)
if isinstance(date_range, list):
# do this
print('wha')
elif isinstance(date_range, str):
# Commented out: date_range = date_range
print(date_range)
return(date_range, report_type)
get_keyword_report_request()
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