gnu: Add python-pycountry.

* gnu/packages/python.scm (python-pycountry, python2-pycountry): New variables.

Signed-off-by: 宋文武 <iyzsong@member.fsf.org>

gnu/packages/python.scm

@@ -10858,6 +10858,37 @@ cases.")
 (define-public python2-ddt
   (package-with-python2 python-ddt))
 
+(define-public python-pycountry
+  (package
+    (name "python-pycountry")
+    (version "18.5.26")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pycountry" version))
+       (sha256
+        (base32
+         "15q9j047s3yc9cfcxq1ch8b71f81na44cr6dydd5gxk0ki9a4akz"))))
+    (build-system python-build-system)
+    (home-page "https://bitbucket.org/flyingcircus/pycountry")
+    (synopsis "ISO databases for languages, countries, currencies, etc.")
+    (description
+     "@code{pycountry} provides the ISO databases for the standards:
+@enumerate
+@item 639-3 (Languages)
+@item 3166 (Countries)
+@item 3166-3 (Deleted Countries)
+@item 3166-2 (Subdivisions of countries)
+@item 4217 (Currencies)
+@item 15924 (Scripts)
+@end enumerate
+It includes a copy from Debian’s pkg-isocodes and makes the data accessible
+through a Python API.")
+    (license license:lgpl2.1+)))
+
+(define-public python2-pycountry
+  (package-with-python2 python-pycountry))
+
 (define-public python-pycosat
   (package
     (name "python-pycosat")