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Possible Solution to Limit Semantic Scholar Usage #76

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Possible Solution to Limit Semantic Scholar Usage #76

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19 changes: 19 additions & 0 deletions richcontext/scholapi/scholapi.py
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Original file line number Diff line number Diff line change
Expand Up @@ -359,6 +359,22 @@ class _ScholInfra_SemanticScholar (_ScholInfra):
"""
http://api.semanticscholar.org/
"""
def __init__ (self, parent=None, name="Generic", api_url=None, cgi_url=None):
super(_ScholInfra_SemanticScholar, self).__init__( parent, name, api_url, cgi_url )
self.time = 0
self.tries = 0
self.MAX_QUERIES = 100
self.MAX_ELAPSED_TIME = 5 * 60

def check_limit(self, t):
if self.tries > 100 and (t - self.time) <= self.MAX_ELAPSED_TIME:
print("We are sleeping for {}} secs".format( (t - self.time)))
time.sleep( (t - self.time))
elif self.tries <= 100:
self.tries += 1
elif (t - self.time) > self.MAX_ELAPSED_TIME:
self.time = time.time()
self.tries = 0

def publication_lookup (self, identifier):
"""
Expand All @@ -369,6 +385,9 @@ def publication_lookup (self, identifier):
message = None

t0 = time.time()

self.check_limit(t0)

url = self._get_api_url(identifier)
meta = json.loads(requests.get(url).text)

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