gnu: Add parfive.

* gnu/packages/python-web.scm (parfive): Newv variable.

Signed-off-by: Christopher Baines <mail@cbaines.net>

gnu/packages/python-web.scm

@@ -984,6 +984,48 @@ (define-public httpie
     (properties `((lint-hidden-cve . ("CVE-2019-10751"))))
     (license license:bsd-3)))
 
+(define-public parfive
+  (package
+    (name "parfive")
+    (version "2.0.1")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "parfive" version))
+              (sha256
+               (base32
+                "19dcbb6g56l5s3ih0bhs3p4acgc0gf4zdzpj4w87m69li2nhmgpx"))))
+    (build-system python-build-system)
+    (arguments
+     (list #:phases #~(modify-phases %standard-phases
+                        (add-before 'check 'disable-test-requiring-network
+                          (lambda _
+                            (substitute* "parfive/tests/test_downloader.py"
+                              (("def test_ftp")
+                               "def __off_test_ftp"))))
+                        (replace 'check
+                          (lambda* (#:key tests? #:allow-other-keys)
+                            (when tests?
+                              (invoke "python" "-m" "pytest" "-vvv" "parfive")))))))
+    (propagated-inputs (list python-aiofiles python-aioftp python-aiohttp
+                             python-tqdm))
+    (native-inputs (list python-pytest
+                         python-pytest-asyncio
+                         python-pytest-cov
+                         python-pytest-localserver
+                         python-pytest-socket
+                         python-setuptools-scm))
+    (home-page "https://parfive.readthedocs.io/")
+    (synopsis "HTTP and FTP parallel file downloader")
+    (description
+     "This package provides CLI tool and Python library @code{parallel} file
+downloader using asyncio. parfive can handle downloading multiple files in
+parallel as well as downloading each file in a number of chunks.
+
+asciicast demo of parfive parfive works by creating a downloader object,
+appending files to it and then running the download. parfive has a synchronous
+API, but uses asyncio to paralellise downloading the files.")
+    (license license:expat)))
+
 (define-public python-html2text
   (package
     (name "python-html2text")