-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathapp.py
238 lines (213 loc) · 8.86 KB
/
app.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
import requests
import gzip
import xml.etree.ElementTree as ElementTree
from functools import partial
from pprint import pprint
import time
def skip_tag(ctx, tag):
for event, elem in ctx:
if elem.tag == tag and event == "end":
return
def parse_node_type(ctx, tag, stop, parser):
for event, elem in ctx:
if event == "start" and elem.tag == tag:
yield parser(ctx)
elif event == "end" and elem.tag == stop:
break
else:
raise Exception("unexpected event and element: (%s, %s)" % (event, elem.tag))
def parse_node_text(tag, ctx):
for event, elem in ctx:
if event == "end" and elem.tag == tag:
return elem.text
def parse_artists_stream(ctx):
return parse_node_type(ctx, "artist", "artists", parse_artist)
def parse_labels_stream(ctx):
return parse_node_type(ctx, "label", "labels", parse_label)
def parse_masters_stream(ctx):
return parse_node_type(ctx, "master", "masters", parse_master)
def parse_releases_stream(ctx):
return parse_node_type(ctx, "release", "releases", parse_release)
def parse_artist(ctx):
artist={}
for event, elem in ctx:
if event == "start":
match elem.tag:
case "id":
artist["id"] = elem.text
case "name":
artist["name"] = elem.text
case "realname":
artist["realname"] = elem.text
case "namevariations":
artist["namevariations"] = [name for name in parse_node_type(ctx, "name", "namevariations", partial(parse_node_text, "name"))]
case "aliases":
artist["aliases"] = [alias for alias in parse_node_type(ctx, "name", "aliases", parse_artist_alias)]
case "profile":
artist["profile"] = elem.text
case _:
skip_tag(ctx, elem.tag)
elif event == "end" and elem.tag == "artist":
return artist
def parse_artist_alias(ctx):
for event, elem in ctx:
if event == "end" and elem.tag == "name":
return {
"id": elem.attrib["id"],
"name": elem.text
}
def parse_master(ctx):
master={}
for event, elem in ctx:
if event == "start":
match elem.tag:
case "main_release":
master["main_release"] = elem.text
case "artists":
master["artists"] = [artist for artist in parse_node_type(ctx, "artist", "artists", parse_release_artist)]
case "genres":
master["genres"] = [genre for genre in parse_node_type(ctx, "genre", "genres", partial(parse_node_text, "genre"))]
case "styles":
master["styles"] = [style for style in parse_node_type(ctx, "style", "styles", partial(parse_node_text, "style"))]
case "year":
master["year"] = elem.text
case "title":
master["title"] = elem.text
case _:
skip_tag(ctx, elem.tag)
elif event == "end" and elem.tag == "master":
master["id"] = elem.attrib["id"]
return master
def parse_release(ctx):
release={}
for event, elem in ctx:
if event == "start":
match elem.tag:
case "artists":
release["artists"] = [artist for artist in parse_node_type(ctx, "artist", "artists", parse_release_artist)]
case "labels":
release["labels"] = [label for label in parse_node_type(ctx, "label", "labels", parse_release_label)]
case "extraartists":
release["extraartists"] = [artist for artist in parse_node_type(ctx, "artist", "extraartists", parse_release_artist)]
case "genres":
release["genres"] = [genre for genre in parse_node_type(ctx, "genre", "genres", partial(parse_node_text, "genre"))]
case "styles":
release["styles"] = [style for style in parse_node_type(ctx, "style", "styles", partial(parse_node_text, "style"))]
case "tracklist":
release["tracklist"] = [track for track in parse_node_type(ctx, "track", "tracklist", parse_release_track)]
case "country":
release["country"] = elem.text
case "notes":
release["notes"] = elem.text
case "released":
release["released"] = elem.text
case "title":
release["title"] = elem.text
case "master_id":
release["master_id"] = elem.text
release["is_main_release"] = elem.get("is_main_release", None)
case _:
skip_tag(ctx, elem.tag)
elif event == "end" and elem.tag == "release":
return release
def parse_release_artist(ctx):
artist={}
for event, elem in ctx:
if event == "start":
match elem.tag:
case "id":
artist["id"] = elem.text
case "anv":
artist["anv"] = elem.text
case "name":
artist["name"] = elem.text
case "role":
artist["role"] = elem.text
case _:
skip_tag(ctx, elem.tag)
elif event == "end" and elem.tag == "artist":
return artist
def parse_release_label(ctx):
label={}
for event, elem in ctx:
if event == "start":
label = elem.attrib
elif event == "end" and elem.tag == "label":
return label
def parse_release_track(ctx):
track={}
for event, elem in ctx:
if event == "start":
match elem.tag:
case "position":
track["position"] = elem.text
case "title":
track["title"] = elem.text
case "duration":
track["duration"] = elem.text
case _:
skip_tag(ctx, elem.tag)
elif event == "end" and elem.tag == "track":
return track
def parse_label(ctx):
label={}
for event, elem in ctx:
if event == "start":
match elem.tag:
case "id":
label["id"] = elem.text
case "name":
label["name"] = elem.text
case "sublabels":
label["sublabels"] = label["labels"] = [label for label in parse_node_type(ctx, "label", "sublabels", parse_sublabel)]
case _:
skip_tag(ctx, elem.tag)
elif event == "end" and elem.tag == "label":
return label
def parse_sublabel(ctx):
label={}
for event, elem in ctx:
if event == "end" and elem.tag == "label":
return {
"id": elem.attrib["id"],
"label": elem.text
}
def stream_xml(url, parser):
s = requests.Session()
with s.get(url, headers=None, stream=True) as res:
res.raise_for_status()
with gzip.GzipFile(fileobj=res.raw, mode='rb') as unzipped:
ctx = ElementTree.iterparse(unzipped, events=("start", "end"))
_, root = next(ctx)
for elem in parser(ctx):
yield elem
root.clear()
def stream_xml_file(path, parser):
f = open(path, "rb")
with gzip.GzipFile(fileobj=f, mode='rb') as unzipped:
ctx = ElementTree.iterparse(unzipped, events=("start", "end"))
_, root = next(ctx)
for elem in parser(ctx):
yield elem
root.clear()
#for elem in stream_xml("https://discogs-data-dumps.s3-us-west-2.amazonaws.com/data/2024/discogs_20240701_artists.xml.gz", parse_artists_stream):
# pprint(elem)
#for elem in stream_xml("https://discogs-data-dumps.s3-us-west-2.amazonaws.com/data/2024/discogs_20240701_labels.xml.gz", parse_labels_stream):
# pprint(elem)
#for elem in stream_xml("https://discogs-data-dumps.s3-us-west-2.amazonaws.com/data/2024/discogs_20240701_masters.xml.gz", parse_masters_stream):
# pprint(elem)
#for elem in stream_xml("https://discogs-data-dumps.s3-us-west-2.amazonaws.com/data/2024/discogs_20240701_releases.xml.gz", parse_releases_stream):
# pprint(elem)
step=10000
count=0
last=time.time()*1000
#for elem in stream_xml_file("./discogs_20141201_releases.xml.gz", parse_releases_stream):
for elem in stream_xml("https://discogs-data-dumps.s3-us-west-2.amazonaws.com/data/2024/discogs_20240701_releases.xml.gz", parse_releases_stream):
#pprint(elem)
count += 1
if (count % step) == 0:
#pprint(elem)
now=time.time()*1000
print("> %d events in %fms" % (step, (now - last)))
last=now
print("read %s releases\n" % count)