Installing DolphinDB Python API

Before installing the DolphinDB Python API, ensure you have a Python environment set up. If not, it is recommended to use the Anaconda Distribution to download Python and its common libraries.

Supported Python Versions

For direct download links for the dolphindb packages, see pypi dolphindb. dolphindb runs on the following operating systems:

Operating SystemSupported Python Versions
Windows (amd64)Python 3.6-3.11
Linux (x86_64)Python 3.6-3.11
Linux (aarch64)Python 3.7-3.11 in conda environment
Mac (x86_64)Python 3.6-3.11 in conda environment
Mac (arm64)Python 3.8-3.11 in conda environment

Note: To use the DolphinDB Python API, also install these library dependencies:

  • future
  • NumPy version between 1.18 and 2.0
  • pandas 1.0.0 and newer (1.3.0 is not supported)
  • packaging
  • Extension Package: PyArrow version 9.0.0 and newer

Installation

Install the DolphinDB Python API with the following pip command (conda commands are not currently supported):

$ pip install dolphindb

FAQ

Q1: Installation of the DolphinDB Python API failed; Import of the dolphindb package failed even though it is successfully installed.

It is recommended to install the .whl package (again) by following the steps below:

(1) Search for the dolphindb wheel that runs on your current operating system (e.g., Linux ARM, Mac ARM, etc.) on PyPI. Download the wheel (.whl file) to your local system. (2) Enter the following command in the terminal:

pip debug --verbose

The Compatible tags section indicates which distributions are compatible with your system.

(3) Rename the downloaded dolphindb wheel according to the compatibility tags. For example, the file name for Mac(x86_64) is "dolphindb-1.30.19.2-cp37-cp37m-macosx_10_16_x86_64.whl". If the compatibility tags show that the system version supported by pip is 10.13, then replace the "10_16" in the original filename with "10_13".

(4) Install the renamed wheel.

If the installation or import still fails, please post your question on StackOverflow with the "dolphindb" tag. We will get back to you soon.

Q2: Import of the dolphindb package failed, with error: ImportError:DLL load failed while importing dolphindbcpp: The specified module could not be found.

The DolphinDB Python API relies on certain dynamic libraries. Based on the error message, it appears that the msvcp140.dll file is missing. To properly import the DolphinDB package, you need to install the Visual C++ Redistributable package.

If you are using a 64-bit version of Windows, please download and install both the x86 and x64 versions of the Visual C++ Redistributable package from the following link: