E-MapReduce:Use third-party Python libraries in a notebook

Method 1: Run the pip command to install Python libraries

1. Go to the configuration tab of a notebook.

   1. Log on to the E-MapReduce (EMR) console.

   2. In the navigation pane on the left, choose EMR Serverless > Spark.

   3. On the Spark page, find the desired workspace and click the name of the workspace.

   4. In the navigation pane on the left of the EMR Serverless Spark page, click Development.

   5. Double-click the notebook that you developed.

2. In a Python cell of the notebook, enter the following command to install the scikit-learn library and click the icon.

   pip install scikit-learn

3. Add a new Python cell, enter the following command in the cell, and then click the icon.

   # Import datasets from the scikit-learn library. 
   from sklearn import datasets
   
   # Load the built-in dataset, such as the Iris dataset. 
   iris = datasets.load_iris()
   X = iris.data # The feature data.
   y = iris.tar get # The tag.
   
   # Divide datasets. 
   from sklearn.model_selection import train_test_split
   
   # Divide the datasets into training sets and test sets. 
   X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.3, random_state=42)
   
   # Use the support vector machine (SVM) model for training. 
   from sklearn.svm import SVC
   
   # Create a classifier instance. 
   clf = SVC(kernel='linear') # Use a linear kernel. 
   
   # Train the model. 
   clf.fit(X_train, y_train)
   
   # Use the trained model to make predictions. 
   y_pred = clf.predict(X_test)
   
   # Evaluate the model performance. 
   from sklearn.metrics import classification_report, accuracy_score
   
   print(classification_report(y_test, y_pred))
   print("Accuracy:", accuracy_score(y_test, y_pred))
   

   The following figure shows the results.

   

Step 1: Create a runtime environment

1. Go to the Runtime Environments page.

   1. Log on to the EMR console.

   2. In the navigation pane on the left, choose EMR Serverless > Spark.

   3. On the Spark page, find the desired workspace and click the name of the workspace.

   4. In the navigation pane on the left of the EMR Serverless Spark page, click Environments.

2. Click Create Environment.

3. On the Create Environment page, configure the Name parameter. Then, click Add Library in the Libraries section.

   For more information, see Manage runtime environments.

4. In the New Library dialog box, set the Type parameter to PyPI, configure the PyPI Package parameter, and then click OK.

   Specify the library name and version in the PyPI Package field. If you do not specify a version, the library of the latest version is installed. Example: scikit-learn.

5. Click OK.

   The system starts to initialize the runtime environment after you click Create.

Step 2: Use the runtime environment

1. Go to the Notebook Sessions tab.

   1. In the navigation pane on the left of the EMR Serverless Spark page, choose O&M Center > Sessions.

   2. Click the Notebook Session tab.

2. Find the desired session and click Edit in the Actions column.

3. Select the created runtime environment from the Environment drop-down list and click Save Changes.

4. In the upper-right corner of the page, click Start.

Step 3: Use the Scikit-learn library to classify data

1. Go to the configuration tab of the desired notebook.

   1. In the navigation pane on the left of the EMR Serverless Spark page, click Development.

   2. Double-click the notebook that you developed.

2. Add a new Python cell, enter the following command in the cell, and then click the icon.

   # Import datasets from the scikit-learn library. 
   from sklearn import datasets
   
   # Load the built-in dataset, such as the Iris dataset. 
   iris = datasets.load_iris()
   X = iris.data # The feature data.
   y = iris.tar get # The tag.
   
   # Divide datasets. 
   from sklearn.model_selection import train_test_split
   
   # Divide the datasets into training sets and test sets. 
   X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.3, random_state=42)
   
   # Use the SVM model for training. 
   from sklearn.svm import SVC
   
   # Create a classifier instance. 
   clf = SVC(kernel='linear') # Use a linear kernel. 
   
   # Train the model. 
   clf.fit(X_train, y_train)
   
   # Use the trained model to make predictions. 
   y_pred = clf.predict(X_test)
   
   # Evaluate the model performance. 
   from sklearn.metrics import classification_report, accuracy_score
   
   print(classification_report(y_test, y_pred))
   print("Accuracy:", accuracy_score(y_test, y_pred))
   

   The following figure shows the results.

   

Step 1: Create and deploy a Conda environment

1. Run the following commands to install Miniconda:

   wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh
   chmod +x Miniconda3-latest-Linux-x86_64.sh
   
   ./Miniconda3-latest-Linux-x86_64.sh -b
   source miniconda3/bin/activate

2. Create a Conda environment for using Python 3.8 and NumPy.

   # Create a Conda environment and activate the environment.
   conda create -y -n pyspark_conda_env python=3.8
   conda activate pyspark_conda_env
   # Install third-party libraries.
   pip install numpy \
   ipykernel~=6.29 \
   jupyter_client~=8.6 \
   jieba \
   conda-pack
   # Package the environment.
   conda pack -f -o pyspark_conda_env.tar.gz

Step 2: Upload the resource file to OSS

Upload the pyspark_conda_env.tar.gz package to Object Storage Service (OSS) and copy the complete OSS path of the package. For more information, see Simple upload.

Step 3: Configure and start the notebook session

1. Go to the Notebook Sessions tab.

   1. In the navigation pane on the left of the EMR Serverless Spark page, choose O&M Center > Sessions.

   2. Click the Notebook Session tab.

2. Find the desired session and click Edit in the Actions column.

3. On the Modify Notebook Session page, add the following configurations to the Spark Configuration field and click Save Changes.

   spark.archives  oss://<yourBucket>/path/to/pyspark_conda_env.tar.gz#env
   spark.pyspark.python ./env/bin/python

   Note

   Replace <yourBucket>/path/to in the code with the OSS path that you copied in the previous step.

4. In the upper-right corner of the page, click Start.

Step 4: Use the Jieba tool to process text data

1. Go to the configuration tab of the desired notebook.

   1. In the navigation pane on the left of the EMR Serverless Spark page, click Development.

   2. Double-click the notebook that you developed.

2. In a new Python cell, enter the following command to use the Jieba tool to segment the Chinese text and click the icon.

   import jieba
   
   strs = ["EMR Serverless Spark is a fully-managed serverless service for large-scale data processing and analysis.", "EMR Serverless Spark supports efficient end-to-end services, such as task development, debugging, scheduling, and O&M.", "EMR Serverless Spark supports resource scheduling and dynamic scaling based on job loads."]
   
   sc.parallelize(strs).flatMap(lambda s: jieba.cut(s, use_paddle=True)).collect()

   The following figure shows the results.