gnu: Add python-telethon.

* gnu/packages/python-xyz.scm (python-telethon): New variable.

Signed-off-by: Efraim Flashner <efraim@flashner.co.il>

gnu/packages/python-xyz.scm

@@ -22626,6 +22626,41 @@ a Python library to convert RELAX NG schemata in Compact syntax (rnc) to
 equivalent schemata in the XML-based default RELAX NG syntax.")
     (license license:expat)))
 
+(define-public python-telethon
+  (package
+    (name "python-telethon")
+    (version "1.17.5")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+              (url "https://github.com/LonamiWebs/Telethon")
+              (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "0l9fhdrq576vllgi9aam45xzw5xi6jhgdv5zz8i4ygssdp7cm8jl"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda* (#:key tests? #:allow-other-keys)
+             (when tests?
+               (invoke "py.test" "-v"))
+             #t)))))
+    (propagated-inputs
+     `(("python-rsa" ,python-rsa)
+       ("python-pyaes" ,python-pyaes)))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-pytest-asyncio" ,python-pytest-asyncio)
+       ("python-pytest-trio" ,python-pytest-trio)))
+    (home-page "https://docs.telethon.dev")
+    (synopsis "Full-featured Telegram client library for Python 3")
+    (description "This library is designed to make it easy to write Python
+programs that can interact with Telegram.")
+    (license license:expat)))
+
 (define-public python-citeproc-py
   (package
     (name "python-citeproc-py")