def parse_course_list(self, response):
hxs = HtmlXPathSelector(response)
department = response.request.meta['department']
# Crawl to the next course list page
try:
next_page = hxs.select('//a[@id="linkFwd"]/@href').extract()[0]
except IndexError:
# This is the last page in pagination
pass
else:
yield Request(
url="https://noppa.tkk.fi" + next_page,
meta={'department': department},
callback=self.parse_course_list)
rows = hxs.select('//tr[starts-with(@id, "informal_")]')
for row in rows:
loader = ItemLoader(CourseItem(), selector=row)
loader.item['department'] = department
loader.add_xpath('code', 'td[1]/text()')
loader.add_xpath('name', 'td[2]/a/text()')
course = loader.load_item()
course_url = row.select('td[2]/a/@href').extract()[0]
yield course
yield Request(
urljoin_rfc(response.url, course_url[:-7] + 'esite'),
meta={'course': course}, callback=self.parse_course_overview
)
def parse_department_list(self, response):
hxs = HtmlXPathSelector(response)
rows = hxs.select('//tr[starts-with(@id, "informal_")]')
for row in rows:
loader = ItemLoader(DepartmentItem(), selector=row)
loader.item['faculty'] = response.request.meta['faculty']
loader.add_xpath('code', 'td[1]/text()')
loader.add_xpath('name', 'td[2]/a/text()')
department = loader.load_item()
url = row.select('td[2]/a/@href').extract()[0]
yield department
yield Request(
urljoin_rfc(response.url, url),
meta={'department': department}, callback=self.parse_course_list
)
def parse_faculty_list(self, response):
"""Parses list of faculties page in Noppa.
For each faculty in the page, yields a FacultyItem and a Request to
faculty's list of departments page in Noppa.
"""
hxs = HtmlXPathSelector(response)
rows = hxs.select('//tr[starts-with(@id, "informal_")]')
for row in rows:
loader = ItemLoader(FacultyItem(), selector=row)
loader.add_xpath('name', 'td/a/text()')
department_url = row.select('td/a/@href').extract()[0]
loader.add_value('code', department_url.split('/')[-1])
faculty = loader.load_item()
yield faculty
yield Request(
urljoin_rfc(response.url, department_url),
meta={'faculty': faculty}, callback=self.parse_department_list
)
def parse_completed_studies(self, response):
hxs = HtmlXPathSelector(response)
current_module = None
for row in hxs.select('//table[@class="eisei"]/tbody/tr[td]'):
is_module = row.select('td/a/img')
is_ungrouped_course = row.select(
'td[@class="tyyli0" or @class="tyyli1"]')
if is_module:
loader = ItemLoader(ModuleItem(), selector=row)
loader.add_xpath('code', 'td[1]/a/text()')
loader.add_xpath('name', 'td[2]/text()')
current_module = loader.load_item()
yield current_module
elif is_ungrouped_course:
loader = ItemLoader(CompletedCourseItem(), selector=row)
loader.add_xpath('code', 'td[1]/a/text()')
loader.add_xpath('name', 'td[2]/text()')
loader.add_xpath('cr', 'td[3]/text()')
loader.add_xpath('ocr', 'td[4]/text()')
loader.add_xpath('grade', 'td[5]/text()')
loader.add_xpath('date', 'td[6]/text()')
loader.add_xpath('teacher', 'td[7]/text()')
loader.item['module'] = None
yield loader.load_item()
else:
loader = ItemLoader(CompletedCourseItem(), selector=row)
loader.add_xpath('code', 'td[1]/a/text()')
loader.add_xpath('name', 'td[1]/text()[2]')
loader.add_xpath('cr', 'td[2]/b/text()')
loader.add_xpath('ocr', 'td[3]/b/text()')
loader.add_xpath('grade', 'td[4]/text()')
loader.add_xpath('date', 'td[5]/text()')
loader.add_xpath('teacher', 'td[6]/text()')
loader.item['module'] = current_module
yield loader.load_item()
def parse_course_overview(self, response):
"""Parses a course overview page and returns a CourseItem containing
the parsed data.
"""
hxs = HtmlXPathSelector(response)
xpath = '//table[contains(@class, "courseBrochure")]'
loader = ItemLoader(CourseOverviewItem(), selector=hxs.select(xpath))
loader.item['course'] = response.request.meta['course']
loader.add_xpath('extent', 'tr[1]/td[2]', re=r'(\d+(?:-\d+)?)')
loader.add_xpath('teaching_period', 'tr[2]/td[2]')
loader.add_xpath('learning_outcomes', 'tr[3]/td[2]')
loader.add_xpath('content', 'tr[4]/td[2]')
loader.add_xpath('prerequisites', 'tr[5]/td[2]')
loader.add_xpath('study_materials', 'tr[11]/td[2]')
return loader.load_item()