Initial commit

etd.py

@@ -0,0 +1,91 @@
+import requests
+import lxml.html
+import pprint
+
+def parse_pos(str):
+    # input data should look like:
+    # 78°,NE
+    s = str.split(',')
+    # remove the degree symbol
+    s[0] = s[0][:-1]
+    return s
+
+url = "http://var2.astro.cz/ETD/predictions.php"
+lat = 39.002792 #delka
+long = 283.043959 #sirka
+
+form_data = {
+    'delka': lat,
+    'sirka': long,
+    'midnight': 2457616.5,
+}
+
+#response = requests.post(url, data=form_data)
+
+# testing only
+f = open("example.html", 'r')
+response = f.read()
+#############
+
+tree = lxml.html.fromstring(response)
+
+targetlist = []
+
+for table in tree.xpath('//table//table')[1:2]:
+    for row in table.xpath('.//tr')[1:]:
+        if row.__len__() == 1:
+            continue
+        elements = row.xpath('.//td//text()')
+
+        # By now we should have the row from ETD, which consists of the following columns
+        # 0: Name of target star
+        # 1: Constellation
+        # 2: Time of transit beginning
+        # 3: Position of transit beginning (alt in degrees, az in rough compass heading)
+        # 4: Timestamp of center of transit (date, month, time)
+        # 5: Position of transit center
+        # 6: Time of transit end
+        # 7: Position of transit end
+        # 8: Duration of transit in minutes
+        # 9: Magnitude of star
+        # 10: Depth of transit (chagne in magnitude)
+        # 11: Elements
+        # 12: RA
+        # 13: Declination
+
+        entry = dict()
+        entry['name'] = elements[0]
+        entry['const'] = elements[1]
+        entry['time_begin'] = elements[2]
+
+        tmp = parse_pos(elements[3])
+        entry['alt_begin'] = tmp[0]
+        entry['az_begin'] = tmp[1]
+
+        # TODO: parse this better
+        entry['ts_center'] = elements[4]
+
+        tmp = parse_pos(elements[5])
+        entry['alt_center'] = tmp[0]
+        entry['az_center'] = tmp[1]
+
+        entry['time_end'] = elements[6]
+
+        tmp = parse_pos(elements[7])
+        entry['alt_end'] = tmp[0]
+        entry['az_end'] = tmp[1]
+
+        entry['duration'] = elements[8]
+        entry['mag'] = elements[9]
+        entry['depth'] = elements[10]
+        entry['elements'] = elements[11]
+        entry['ra'] = elements[12][4:]
+        entry['dec'] = elements[13][4:]
+
+        targetlist.append(entry)
+
+pp = pprint.PrettyPrinter()
+for i in targetlist:
+    pp.pprint(i)
+    print('\n')
+