BeautifulSoup is replaced with regexp

.gitignore

@@ -0,0 +1,138 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/

reverso_api/context.py

@@ -1,5 +1,6 @@
 """Reverso Context (context.reverso.net) API for Python"""
 
+import re
 import json
 from collections import namedtuple
 from typing import Generator
@@ -50,7 +51,6 @@ def __init__(self,
         self.__data_ismodified = True
         self.__total_pages = None
 
-        # FIXME: make self.supported_langs read-only
         self.supported_langs = self.__get_supported_langs()
 
         self.source_text, self.target_text = source_text, target_text
@@ -71,26 +71,9 @@ def __eq__(self, other) -> bool:
 
     @staticmethod
     def __get_supported_langs() -> dict:
-        supported_langs = {}
-
         response = requests.get("https://context.reverso.net/translation/",
                                 headers=HEADERS)
-
-        soup = BeautifulSoup(response.content, features="lxml")
-
-        src_selector = soup.find("div", id="src-selector")
-        trg_selector = soup.find("div", id="trg-selector")
-
-        for selector, attribute in ((src_selector, "source_lang"),
-                                    (trg_selector, "target_lang")):
-            dd_spans = selector.find(class_="drop-down").find_all("span")
-            langs = [span.get("data-value") for span in dd_spans]
-            langs = [lang for lang in langs
-                     if isinstance(lang, str) and len(lang) == 2]
-
-            supported_langs[attribute] = tuple(langs)
-
-        return supported_langs
+        return frozenset(re.findall('data-value="([a-z]{2})"', response.text))
 
     @property
     def source_text(self) -> str:
@@ -226,7 +209,7 @@ def target_text(self, value) -> None:
     def source_lang(self, value) -> None:
         value = str(value)
 
-        if value not in self.supported_langs["source_lang"]:
+        if value not in self.supported_langs:
             raise ValueError(f"{value!r} source language is not supported")
 
         if value == self.source_lang:
@@ -239,7 +222,7 @@ def source_lang(self, value) -> None:
     def target_lang(self, value) -> None:
         value = str(value)
 
-        if value not in self.supported_langs["target_lang"]:
+        if value not in self.supported_langs:
             raise ValueError(f"{value!r} target language is not supported")
 
         if value == self.source_lang: