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How To Install Python Packages – Part V

How To Install Python Packages – Part V

Posted December 6, 2019
Madhuri Sangaraju and Jay Parmar
QuantInsti

See the previous installment in this series here.

Version of the package

PyPI lets the developer submit any number of versions of the package. It holds a record for each combination of package name and version submitted in the repository.

The ‘backtrader‘ package also has different versions available. You can check for them here: https://pypi.org/project/backtrader/1.9.70.122/#history

Using a different version of the Python package

If you want to use a different version of the package, you can install that using the following command.

Let us install the 1.9.68.122 version of the ‘backtrader’ package.

# Install a specific version of the package
!pip install backtrader==1.9.68.122

How to install Python packages

Check for the version of the package

You can use the following syntax to check for the version of the package.

`package_name.__version__`

But first, you need to import the package. You can check for the version of the ‘backtrader’ package as follows.

# Import the package
Import backtrader
# Check the version of the package
backtrader._version_

Stay tuned for the next installment, in which the authors will discuss dir()function.

Visit QuantInsti website to download readily available Python commands.

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