167 lines
5.7 KiB
Markdown
167 lines
5.7 KiB
Markdown
# Python User Guide
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---
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Supported Platforms: Linux and macOS. _**Note:** Windows is currently not supported._
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### **1. Install**
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- We recommend using [conda](https://docs.conda.io/projects/conda/en/latest/user-guide/install/) to prepare the Python environment as follows:
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```bash
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conda create -n bigdl python=3.7 # "bigdl" is conda environment name, you can use any name you like.
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conda activate bigdl
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```
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- You need to install JDK in the environment, and properly set the environment variable `JAVA_HOME`. __JDK8__ is highly recommended.
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You may take the following commands as a reference for installing [OpenJDK](https://openjdk.java.net/install/):
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```bash
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# For Ubuntu
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sudo apt-get install openjdk-8-jre
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export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64/
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# For CentOS
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su -c "yum install java-1.8.0-openjdk"
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export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.282.b08-1.el7_9.x86_64/jre
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export PATH=$PATH:$JAVA_HOME/bin
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java -version # Verify the version of JDK.
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```
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#### **1.1 Official Release**
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You can install the latest release version of BigDL (built on top of Spark 2.4.6 by default) as follows:
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```bash
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pip install bigdl
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```
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_**Note:** Installing BigDL will automatically install all the BigDL packages including
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`bigdl-nano`, `bigdl-dllib`, `bigdl-orca`, `bigdl-chronos`, `bigdl-friesian`, `bigdl-serving` and their dependencies if they haven't been detected in your conda environment._
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#### **1.2 Nightly Build**
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You can install the latest nightly build of BigDL as follows:
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```bash
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pip install --pre --upgrade bigdl
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```
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Alternatively, you can find the list of the nightly build versions [here](https://pypi.org/project/BigDL/#history), and install a specific version as follows:
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```bash
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pip install bigdl==version
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```
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_**Note:** If you are using a custom URL of Python Package Index, you may need to check whether the latest packages have been sync'ed with pypi.
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Or you can add the option `-i https://pypi.python.org/simple` when pip install to use pypi as the index-url._
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You could uninstall all the packages of BigDL as follows:
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```bash
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pip uninstall bigdl-dllib bigdl-tf bigdl-math bigdl-orca bigdl-chronos bigdl-friesian bigdl-nano bigdl-serving bigdl
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```
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#### **1.3 BigDL on Spark 3**
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You can install BigDL built on top of Spark 3.1.2 as follows:
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```bash
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pip install bigdl-spark3 # Install the latest release version
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pip install --pre --upgrade bigdl-spark3 # Install the latest nightly build version
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```
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You can find the list of the nightly build versions built on top of Spark 3.1.2 [here](https://pypi.org/project/bigdl-spark3/#history).
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---
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### **2. Run**
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_**Note:** Installing BigDL from pip will automatically install `pyspark`. To avoid possible conflicts, you are highly recommended to **unset the environment variable `SPARK_HOME`** if it exists in your environment._
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#### **2.1 Interactive Shell**
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You may test if the installation is successful using the interactive Python shell as follows:
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* Type `python` in the command line to start a REPL.
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* Try to run the example code below to verify the installation:
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```python
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from bigdl.orca import init_orca_context
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sc = init_orca_context() # Initiation of bigdl on the underlying cluster.
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```
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#### **2.2 Jupyter Notebook**
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You can start the Jupyter notebook as you normally do using the following command and run BigDL programs directly in a Jupyter notebook:
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```bash
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jupyter notebook --notebook-dir=./ --ip=* --no-browser
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```
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#### **2.3 Python Script**
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You can directly write BigDL programs in a Python file (e.g. script.py) and run in the command line as a normal Python program:
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```bash
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python script.py
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```
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---
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### **3. Python Dependencies**
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We recommend using [conda](https://docs.conda.io/projects/conda/en/latest/user-guide/install/) to manage your Python dependencies. Libraries installed in the current conda environment will be automatically distributed to the cluster when calling `init_orca_context`. You can also add extra dependencies as `.py`, `.zip` and `.egg` files by specifying `extra_python_lib` argument in `init_orca_context`.
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For more details, please refer to [Orca Context](../Orca/Overview/orca-context.md).
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---
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### **4. Compatibility**
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BigDL has been tested on __Python 3.6 and 3.7__ with the following library versions:
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```bash
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pyspark==2.4.6 or 3.1.2
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ray==1.9.2
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tensorflow==1.15.0 or >2.0
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pytorch>=1.5.0
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torchvision>=0.6.0
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horovod==0.19.2
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mxnet>=1.6.0
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bayesian-optimization==1.1.0
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dask==2.14.0
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h5py==2.10.0
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numpy==1.18.1
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opencv-python==4.2.0.34
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pandas==1.0.3
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Pillow==7.1.1
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protobuf==3.12.0
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psutil==5.7.0
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py4j==0.10.7
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redis==3.4.1
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scikit-learn==0.22.2.post1
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scipy==1.4.1
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tensorboard==1.15.0
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tensorboardX>=2.1
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tensorflow-datasets==3.2.0
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tensorflow-estimator==1.15.1
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tensorflow-gan==2.0.0
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tensorflow-hub==0.8.0
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tensorflow-metadata==0.21.1
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tensorflow-probability==0.7.0
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Theano==1.0.4
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```
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---
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### **5. Known Issues**
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- If you meet the following error when `pip install bigdl`:
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```
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ERROR: Could not find a version that satisfies the requirement pypandoc (from versions: none)
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ERROR: No matching distribution found for pypandoc
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Could not import pypandoc - required to package PySpark
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Traceback (most recent call last):
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File "/root/anaconda3/lib/python3.8/site-packages/setuptools/installer.py", line 126, in fetch_build_egg
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subprocess.check_call(cmd)
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File "/root/anaconda3/lib/python3.8/subprocess.py", line 364, in check_call
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raise CalledProcessError(retcode, cmd)
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subprocess.CalledProcessError: Command '['/root/anaconda3/bin/python', '-m', 'pip', '--disable-pip-version-check', 'wheel', '--no-deps', '-w', '/tmp/tmprefr87ue', '--quiet', 'pypandoc']' returned non-zero exit status 1.
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```
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This is actually caused by `pip install pyspark` in your Python environment. You can fix it by running `pip install pypandoc` first and then `pip install bigdl`.
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