我想對我之前的問題進行更多改進： 如何格式化字典串列中的字典物件？
列印（標簽串列）
[[{'script': [{'domain': 'random.com', 'path': 'js/custom.js'}]},
{'script': [{'domain': 'cdnjs.cloudflare.com',
'path': '/ajax/libs/fancybox/2.1.5/jquery.fancybox.min.js'}]},
{'link': [{'domain': 'random.com', 'path': 'css/bootstrap.min.css'}]},
{'link': [{'domain': 'random.com', 'path': 'css/style.css'}]},
{'link': [{'domain': 'random.com', 'path': 'css/responsive.css'}]},
{'link': [{'domain': 'random.com',
'path': 'css/jquery.mCustomScrollbar.min.css'}]},
{'link': [{'domain': 'netdna.bootstrapcdn.com',
'path': '/font-awesome/4.0.3/css/font-awesome.css'}]}]]
我想獲取'domain'密鑰中的所有資料并將它們domain.txt逐行存盤在一個新檔案中。
域名.txt
random.com
cdnjs.cloudfare.com
netdna.bootstrapcdn.com
應避免重復。
uj5u.com熱心網友回復：
一種方法：
data = [[{'script': [{'domain': 'random.com', 'path': 'js/custom.js'}]},
{'script': [{'domain': 'cdnjs.cloudflare.com',
'path': '/ajax/libs/fancybox/2.1.5/jquery.fancybox.min.js'}]},
{'link': [{'domain': 'random.com', 'path': 'css/bootstrap.min.css'}]},
{'link': [{'domain': 'random.com', 'path': 'css/style.css'}]},
{'link': [{'domain': 'random.com', 'path': 'css/responsive.css'}]},
{'link': [{'domain': 'random.com',
'path': 'css/jquery.mCustomScrollbar.min.css'}]},
{'link': [{'domain': 'netdna.bootstrapcdn.com',
'path': '/font-awesome/4.0.3/css/font-awesome.css'}]}]]
# open file for writing
with open("domain.txt", "w") as outfile:
# create a set to check for duplicates
seen = set()
for top in data:
for e in top:
# get domain data either from script or link
se = e.get("script") or e.get("link")
# fetch the domain name
domain = se[0]["domain"]
# write if not previously seen
if domain not in seen:
seen.add(domain)
outfile.write(f"{domain}\n")
輸出
random.com
cdnjs.cloudflare.com
netdna.bootstrapcdn.com
uj5u.com熱心網友回復：
看起來似乎不需要大量的內部串列，但如果您真的需要它們，那么這應該處理所有可能發生的情況：
taglist = [[{'script': [{'domain': 'random.com', 'path': 'js/custom.js'}]},
{'script': [{'domain': 'cdnjs.cloudflare.com',
'path': '/ajax/libs/fancybox/2.1.5/jquery.fancybox.min.js'}]},
{'link': [{'domain': 'random.com', 'path': 'css/bootstrap.min.css'}]},
{'link': [{'domain': 'random.com', 'path': 'css/style.css'}]},
{'link': [{'domain': 'random.com', 'path': 'css/responsive.css'}]},
{'link': [{'domain': 'random.com',
'path': 'css/jquery.mCustomScrollbar.min.css'}]},
{'link': [{'domain': 'netdna.bootstrapcdn.com',
'path': '/font-awesome/4.0.3/css/font-awesome.css'}]}]]
D = set()
with open('domain.txt', 'w') as dfile:
for tag in taglist:
for subtag in tag:
if (d := subtag.get('script', None)) is None:
if (d := subtag.get('link', None)) is None:
continue
for e in d:
if (domain := e.get('domain', None)):
D.add(domain)
for domain in D:
print(domain, file=dfile)
[注意：為此您需要 Python 3.8 ]
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