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moved scraping of Predicted - ACD/Labs tab to its own function

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This commit is contained in:
RTB 2014-06-10 13:57:10 +02:00
parent 5e13af5b1b
commit 41bbe5b1de
1 changed files with 50 additions and 37 deletions
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87
FourmiCrawler/sources/ChemSpider.py
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@ -66,43 +66,7 @@ class ChemSpider(Source):
"""
properties = []
# Predicted - ACD/Labs tab
td_list = sel.xpath('.//table[@id="acdlabs-table"]//td').xpath(
'normalize-space(string())')
prop_names = td_list[::2]
prop_values = td_list[1::2]
for (prop_name, prop_value) in zip(prop_names, prop_values):
# [:-1] is to remove the colon at the end, [TODO] - test for colon
prop_name = prop_name.extract().encode('utf-8')[:-1]
prop_value = prop_value.extract().encode('utf-8')
prop_conditions = ''
# Test for properties without values, with one hardcoded exception
if not re.match(r'^\d', prop_value) or (prop_name == 'Polarizability' and prop_value == '10-24cm3'):
continue
# Match for condition in parentheses
m = re.match(r'(.*) \((.*)\)', prop_name)
if m:
prop_name = m.group(1)
prop_conditions = m.group(2)
# Match for condition in value seperated by an 'at'
m = re.match(r'(.*) at (.*)', prop_value)
if m:
prop_value = m.group(1)
prop_conditions = m.group(2)
new_prop = self.newresult(
attribute=prop_name,
value=prop_value,
source='ChemSpider Predicted - ACD/Labs Tab',
conditions=prop_conditions
)
properties.append(new_prop)
log.msg('CS prop: |%s| |%s| |%s|' %
(new_prop['attribute'], new_prop['value'], new_prop['source']),
level=log.DEBUG)
properties.extend(self.parse_acdlabstab(sel))
# Experimental Data Tab, Physico-chemical properties in particular
scraped_list = sel.xpath('.//li[span="Experimental Physico-chemical '
@ -128,6 +92,55 @@ class ChemSpider(Source):
return properties
def parse_acdlabstab(self, sel):
"""
This function scrapes the 'Predicted ACD/Labs tab' under Properties
:param sel: a Selector object of the whole page
:return: a list of Request objects
"""
properties = []
td_list = sel.xpath('.//table[@id="acdlabs-table"]//td').xpath(
'normalize-space(string())')
prop_names = td_list[::2]
prop_values = td_list[1::2]
for (prop_name, prop_value) in zip(prop_names, prop_values):
# [:-1] is to remove the colon at the end, [TODO] - test for colon
prop_name = prop_name.extract().encode('utf-8')[:-1]
prop_value = prop_value.extract().encode('utf-8')
prop_conditions = ''
# Test for properties without values, with one hardcoded exception
if (not re.match(r'^\d', prop_value) or
(prop_name == 'Polarizability' and prop_value == '10-24cm3')):
continue
# Match for condition in parentheses
m = re.match(r'(.*) \((.*)\)', prop_name)
if m:
prop_name = m.group(1)
prop_conditions = m.group(2)
# Match for condition in value seperated by an 'at'
m = re.match(r'(.*) at (.*)', prop_value)
if m:
prop_value = m.group(1)
prop_conditions = m.group(2)
new_prop = self.newresult(
attribute=prop_name,
value=prop_value,
source='ChemSpider Predicted - ACD/Labs Tab',
conditions=prop_conditions
)
properties.append(new_prop)
log.msg('CS prop: |%s| |%s| |%s|' %
(new_prop['attribute'], new_prop['value'],
new_prop['source']),
level=log.DEBUG)
return properties
def parse_synonyms(self, sel):
"""
This function scrapes the list of Names and Identifiers