4 title: "Tutorial: Search PGP data by trait"
8 h1. Tutorial: Search PGP data by trait
10 Here you will use the Python SDK to find public WGS data for people who have a certain medical condition.
14 _Explain the motivation in this example a little better. If I'm
15 reading this right, the workflow is
16 traits -> people with those traits -> presense of a specific genetic
17 variant in the people with the reported traits_
19 _Rather than having the user do this through the Python command line,
20 it might be easier to write a file that is going to do each step_
24 * Log in to a VM "using SSH":ssh-access.html
25 * Put an "API token":api-tokens.html in your @ARVADOS_API_TOKEN@ environment variable
26 * Put the API host name in your @ARVADOS_API_HOST@ environment variable
27 * Run the @python@ interactive shell.
29 If everything is set up correctly, you will be able to import the arvados SDK:
35 ...and display your account information:
38 arvados.service.users().current().execute()
41 h3. More prerequisites
50 List traits containing the term "cancer":
53 for t in filter(lambda t: re.search('cancer', t['name']),
54 arvados.service.traits().list(limit=1000).execute()['items']):
55 print t['uuid'], t['name']
59 _Should break this down into steps instead of being clever and making
60 it a python one-liner_
66 qr1hi-q1cn2-8q57g2diohwnzm0 Cervical cancer
67 qr1hi-q1cn2-vqp4243janpjbyj Breast cancer
68 qr1hi-q1cn2-v6usijujcpwqrn1 Non-melanoma skin cancer
72 We will use the "Non-melanoma skin cancer" trait with uuid @qr1hi-q1cn2-v6usijujcpwqrn1@.
75 trait_uuid = 'qr1hi-q1cn2-v6usijujcpwqrn1'
80 List humans who report this condition:
83 trait_links = arvados.service.links().list(limit=1000,where=json.dumps({
84 'link_class': 'human_trait',
85 'tail_kind': 'arvados#human',
86 'head_uuid': trait_uuid
87 })).execute()['items']
90 _Same comment, break this out and describe each step_
92 The "tail_uuid" attribute of each of these Links refers to a Human.
95 map(lambda l: l['tail_uuid'], trait_links)
101 [u'1h9kt-7a9it-c0uqa4kcdh29wdf', u'1h9kt-7a9it-x4tru6mn40hc6ah',
102 u'1h9kt-7a9it-yqb8m5s9cpy88i8', u'1h9kt-7a9it-46sm75w200ngwny',
103 u'1h9kt-7a9it-gx85a4tdkpzsg3w', u'1h9kt-7a9it-8cvlaa8909lgeo9',
104 u'1h9kt-7a9it-as37qum2pq8vizb', u'1h9kt-7a9it-14fph66z2baqxb9',
105 u'1h9kt-7a9it-e9zc7i4crmw3v69', u'1h9kt-7a9it-np7f35hlijlxdmt',
106 u'1h9kt-7a9it-j9hqyjwbvo9cojn', u'1h9kt-7a9it-lqxdtm1gynmsv13',
107 u'1h9kt-7a9it-zkhhxjfg2o22ywq', u'1h9kt-7a9it-nsjoxqd33lzldw9',
108 u'1h9kt-7a9it-ytect4smzcgd4kg', u'1h9kt-7a9it-y6tl353b3jc4tos',
109 u'1h9kt-7a9it-98f8qave4f8vbs5', u'1h9kt-7a9it-gd72sh15q0p4wq3',
110 u'1h9kt-7a9it-zlx25dscak94q9h', u'1h9kt-7a9it-8gronw4rbgmim01',
111 u'1h9kt-7a9it-wclfkjcb23tr5es', u'1h9kt-7a9it-rvp2qe7szfz4dy6',
112 u'1h9kt-7a9it-50iffhmpzsktwjm', u'1h9kt-7a9it-ul412id5y31a5o8',
113 u'1h9kt-7a9it-732kwkfzylmt4ik', u'1h9kt-7a9it-v9zqxegpblsbtai',
114 u'1h9kt-7a9it-kmaraqduit1v5wd', u'1h9kt-7a9it-t1nwtlo1hru5vvq',
115 u'1h9kt-7a9it-q3w6j9od4ibpoyl', u'1h9kt-7a9it-qz8vzkuuz97ezwv',
116 u'1h9kt-7a9it-t1v8sjz6dm9jmjf', u'1h9kt-7a9it-qe8wrbyvuqs5jew']
121 For now we don't need to look up the Human objects themselves.
123 As an aside, we will look up "identifier" links to find PGP-assigned participant identifiers:
126 human_uuids = map(lambda l: l['tail_uuid'], trait_links)
127 pgpid_links = arvados.service.links().list(limit=1000,where=json.dumps({
128 "link_class": "identifier",
129 "head_uuid": human_uuids
130 })).execute()['items']
131 map(lambda l: l['name'], pgpid_links)
137 [u'hu01024B', u'hu11603C', u'hu15402B', u'hu174334', u'hu1BD549', u'hu237A50',
138 u'hu34A921', u'hu397733', u'hu414115', u'hu43860C', u'hu474789', u'hu553620',
139 u'hu56B3B6', u'hu5917F3', u'hu599905', u'hu5E55F5', u'hu602487', u'hu633787',
140 u'hu68F245', u'hu6C3F34', u'hu7260DD', u'hu7A2F1D', u'hu94040B', u'hu9E356F',
141 u'huAB8707', u'huB1FD55', u'huB4883B', u'huD09050', u'huD09534', u'huD3A569',
142 u'huDF04CC', u'huE2E371']
145 These PGP IDs let us find public profiles:
147 * "https://my.personalgenomes.org/profile/huE2E371":https://my.personalgenomes.org/profile/huE2E371
148 * "https://my.personalgenomes.org/profile/huDF04CC":https://my.personalgenomes.org/profile/huDF04CC
153 Find Collections that were provided by these Humans.
156 provenance_links = arvados.service.links().list(where=json.dumps({
157 "link_class": "provenance",
159 "tail_uuid": human_uuids
160 })).execute()['items']
161 collection_uuids = map(lambda l: l['head_uuid'], provenance_links)
163 # build map of human uuid -> PGP ID
165 for pgpid_link in pgpid_links:
166 pgpid[pgpid_link['head_uuid']] = pgpid_link['name']
168 # build map of collection uuid -> PGP ID
169 for p_link in provenance_links:
170 pgpid[p_link['head_uuid']] = pgpid[p_link['tail_uuid']]
172 # get details (e.g., list of files) of each collection
173 collections = arvados.service.collections().list(where=json.dumps({
174 "uuid": collection_uuids
175 })).execute()['items']
177 # print PGP public profile links with file locators
178 for c in collections:
180 print "https://my.personalgenomes.org/profile/%s %s %s%s" % (pgpid[c['uuid']], c['uuid'], ('' if f[0] == '.' else f[0]+'/'), f[1])
187 https://my.personalgenomes.org/profile/hu43860C a58dca7609fa84c8c38a7e926a97b2fc+302+K@qr1hi var-GS00253-DNA_A01_200_37-ASM.tsv.bz2
188 https://my.personalgenomes.org/profile/huB1FD55 ea30eb9e46eedf7f05ed6e348c2baf5d+291+K@qr1hi var-GS000010320-ASM.tsv.bz2
189 https://my.personalgenomes.org/profile/huDF04CC 4ab0df8f22f595d1747a22c476c05873+242+K@qr1hi var-GS000010427-ASM.tsv.bz2
190 https://my.personalgenomes.org/profile/hu7A2F1D 756d0ada29b376140f64e7abfe6aa0e7+242+K@qr1hi var-GS000014566-ASM.tsv.bz2
191 https://my.personalgenomes.org/profile/hu553620 7ed4e425bb1c7cc18387cbd9388181df+242+K@qr1hi var-GS000015272-ASM.tsv.bz2
192 https://my.personalgenomes.org/profile/huD09534 542112e210daff30dd3cfea4801a9f2f+242+K@qr1hi var-GS000016374-ASM.tsv.bz2
193 https://my.personalgenomes.org/profile/hu599905 33a9f3842b01ea3fdf27cc582f5ea2af+242+K@qr1hi var-GS000016015-ASM.tsv.bz2
194 https://my.personalgenomes.org/profile/hu599905 d6e2e57cd60ba5979006d0b03e45e726+81+K@qr1hi Witch_results.zip
195 https://my.personalgenomes.org/profile/hu553620 ea4f2d325592a1272f989d141a917fdd+85+K@qr1hi Devenwood_results.zip
196 https://my.personalgenomes.org/profile/hu7A2F1D 4580f6620bb15b25b18373766e14e4a7+85+K@qr1hi Innkeeper_results.zip
197 https://my.personalgenomes.org/profile/huD09534 fee37be9440b912eb90f5e779f272416+82+K@qr1hi Hallet_results.zip
200 h3. Search for a variant.
202 Look for variant rs1126809 in each of the "var" files (these contain variant calls from WGS data).
206 for c in collections:
207 if [] != filter(lambda f: re.search('^var-.*\.tsv\.bz2', f[1]), c['files']):
208 job[c['uuid']] = arvados.service.jobs().create(job=json.dumps({
210 'script_parameters': {'input': c['uuid'], 'pattern': "rs1126809\\b"},
211 'script_version': 'e7aeb42'
213 print "%s %s" % (pgpid[c['uuid']], job[c['uuid']]['uuid'])
220 hu43860C qr1hi-8i9sb-wyqq2eji4ehiwkq
221 huB1FD55 qr1hi-8i9sb-ep68uf0jkj3je7q
222 huDF04CC qr1hi-8i9sb-4ts4cvx6mbtcrsk
223 hu7A2F1D qr1hi-8i9sb-5lkiu9sh7vdgven
224 hu553620 qr1hi-8i9sb-nu4p6hjmziic022
225 huD09534 qr1hi-8i9sb-bt9389e9g3ff0m1
226 hu599905 qr1hi-8i9sb-ocg0i8r75luvke3
229 Monitor job progress by refreshing the Jobs page in Workbench, or by using the API:
232 map(lambda j: arvados.service.jobs().get(uuid=j['uuid']).execute()['success'], job.values())
238 [True, True, True, True, True, True, True]
241 (Unfinished jobs will appear as None, failed jobs as False, and completed jobs as True.)
243 After the jobs have completed, check output file sizes.
246 for collection_uuid in job:
247 job_uuid = job[collection_uuid]['uuid']
248 job_output = arvados.service.jobs().get(uuid=job_uuid).execute()['output']
249 output_files = arvados.service.collections().get(uuid=job_output).execute()['files']
250 print "%s %3d %s" % (pgpid[collection_uuid], output_files[0][2], job_output)
257 hu599905 80 5644238bfb2a1925d423f2c264819cfb+75+K@qr1hi
258 huD09534 80 f98f92573cf521333607910d320cc33b+75+K@qr1hi
259 huB1FD55 0 c10e07d8d90b51ee7f3b0a5855dc77c3+65+K@qr1hi
260 hu7A2F1D 80 922c4ce8d3dab3268edf8b9312cc63d4+75+K@qr1hi
261 hu553620 0 66da988f45a7ee16b6058fcbe9859d69+65+K@qr1hi
262 huDF04CC 80 bbe919451a437dde236a561d4e469ad2+75+K@qr1hi
263 hu43860C 0 45797e38410de9b9ddef2f4f0ec41a93+76+K@qr1hi
266 Thus, of the 7 WGS results available for PGP participants reporting non-melanoma skin cancer, 4 include the rs1126809 / TYR-R402Q variant.