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Show First 20 Lines • Show All 135 Lines • ▼ Show 20 Lines	def get_return_types(self):
)		)
# if the user puts a star,		# if the user puts a star,
# then we filter nothing, we don't need the other information		# then we filter nothing, we don't need the other information
if "*" in s:		if "*" in s:
return "*"		return "*"
else:		else:
return s		return s

def get_traversal(self):
"""Validate HTTP query parameter `traversal`, i.e., visit order"""
s = self.request.query.get("traversal", "dfs")
if s not in ("bfs", "dfs"):
raise aiohttp.web.HTTPBadRequest(text=f"invalid traversal order: {s}")
return s

def get_limit(self):		def get_limit(self):
"""Validate HTTP query parameter `limit`, i.e., number of results"""		"""Validate HTTP query parameter `limit`, i.e., number of results"""
s = self.request.query.get("limit", "0")		s = self.request.query.get("limit", "0")
try:		try:
return int(s)		return int(s)
except ValueError:		except ValueError:
raise aiohttp.web.HTTPBadRequest(text=f"invalid limit value: {s}")		raise aiohttp.web.HTTPBadRequest(text=f"invalid limit value: {s}")

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