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"""
A bunch of helpers to parse and normalize strings: external identifiers,
free-form input, titles, etc.
"""
import re
def clean_doi(raw):
"""
Removes any:
- padding whitespace
- 'doi:' prefix
- URL prefix
Does not try to un-URL-encode
Returns None if not a valid DOI
"""
raw = raw.strip()
if len(raw.split()) != 1:
return None
if raw.startswith("doi:"):
raw = raw[4:]
if raw.startswith("http://"):
raw = raw[7:]
if raw.startswith("https://"):
raw = raw[8:]
if raw.startswith("doi.org/"):
raw = raw[8:]
if raw.startswith("dx.doi.org/"):
raw = raw[11:]
if not raw.startswith("10."):
return None
# TODO: actual regex
return raw
def test_clean_doi():
assert clean_doi("10.1234/asdf ") == "10.1234/asdf"
assert clean_doi("http://doi.org/10.1234/asdf ") == "10.1234/asdf"
assert clean_doi("https://dx.doi.org/10.1234/asdf ") == "10.1234/asdf"
assert clean_doi("doi:10.1234/asdf ") == "10.1234/asdf"
assert clean_doi("doi:10.1234/ asdf ") == None
def clean_arxiv_id(raw):
"""
Removes any:
- 'arxiv:' prefix
Works with versioned or un-versioned arxiv identifiers.
"""
pass
def test_clean_arxiv_id():
pass
def clean_pmcid(raw):
raw = raw.strip()
if len(raw.split()) != 1:
return None
if raw.startswith("PMC") and raw[3:] and raw[3:].isdigit():
return raw
return None
def clean_sha1(raw):
raw = raw.strip()
if len(raw.split()) != 1:
return None
pass
def clean_issn(raw):
raw = raw.strip()
if len(raw.split()) != 1:
return None
if len(raw) == 9 and raw[4] == "-" and raw[0:4].isdigit():
return raw
return None
def test_clean_issn():
assert clean_issn("1234-4567") == "1234-4567"
assert clean_issn("134-4567") == None
assert clean_issn("123X-4567") == None
def clean_isbn13(raw):
raw = raw.strip()
if len(raw.split()) != 1:
return None
return None
def clean_orcid(raw):
raw = raw.strip()
if len(raw.split()) != 1:
return None
return None
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