Python 3.9 (#3926)

* Upgrade to Python 3.9

* pip install wheel for faster builds

* updating DIRECTORY.md

* requirements.txt: tensorflow; python_version < '3.9'

* keras requires tensorflow

* Rename lstm_prediction.py to lstm_prediction.py_tf

* Update requirements.txt

* updating DIRECTORY.md

* Update requirements.txt

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Co-authored-by: Dhruv Manilawala <dhruvmanila@gmail.com>

.github/workflows/build.yml

@@ -12,14 +12,14 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: "3.8"
+          python-version: "3.9"
       - uses: actions/cache@v2
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-${{ hashFiles('requirements.txt') }}
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip setuptools six
+          python -m pip install --upgrade pip setuptools six wheel
           python -m pip install pytest-cov -r requirements.txt
       - name: Run tests
         run: pytest --doctest-modules --ignore=project_euler/ --cov-report=term-missing:skip-covered --cov=. .

DIRECTORY.md

@@ -356,8 +356,6 @@
   * [Linear Discriminant Analysis](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/linear_discriminant_analysis.py)
   * [Linear Regression](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/linear_regression.py)
   * [Logistic Regression](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/logistic_regression.py)
-  * Lstm
-    * [Lstm Prediction](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/lstm/lstm_prediction.py)
   * [Multilayer Perceptron Classifier](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/multilayer_perceptron_classifier.py)
   * [Polymonial Regression](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/polymonial_regression.py)
   * [Random Forest Classifier](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/random_forest_classifier.py)
@@ -866,6 +864,7 @@
   * [Covid Stats Via Xpath](https://github.com/TheAlgorithms/Python/blob/master/web_programming/covid_stats_via_xpath.py)
   * [Crawl Google Results](https://github.com/TheAlgorithms/Python/blob/master/web_programming/crawl_google_results.py)
   * [Crawl Google Scholar Citation](https://github.com/TheAlgorithms/Python/blob/master/web_programming/crawl_google_scholar_citation.py)
+  * [Currency Converter](https://github.com/TheAlgorithms/Python/blob/master/web_programming/currency_converter.py)
   * [Current Stock Price](https://github.com/TheAlgorithms/Python/blob/master/web_programming/current_stock_price.py)
   * [Current Weather](https://github.com/TheAlgorithms/Python/blob/master/web_programming/current_weather.py)
   * [Daily Horoscope](https://github.com/TheAlgorithms/Python/blob/master/web_programming/daily_horoscope.py)

requirements.txt

@@ -1,6 +1,6 @@
 beautifulsoup4
 fake_useragent
-keras
+keras; python_version < '3.9'
 lxml
 matplotlib
 numpy
@@ -13,5 +13,5 @@ scikit-fuzzy
 sklearn
 statsmodels
 sympy
-tensorflow
+tensorflow; python_version < '3.9'
 xgboost