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I'm trying to install and run pandas on an Amazon Lambda instance. I've used the recommended zip method of packaging my code file model_a.py and related python libraries (pip install pandas -t /path/to/dir/) and uploaded the zip to Lambda. When I try to run a test, this is the error message I get:
Unable to import module 'model_a': C extension: /var/task/pandas/hashtable.so: undefined symbol: PyFPE_jbuf not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace' to build the C extensions first.
Looks like an error in a variable defined in hashtable.so that comes with the pandas installer. Googling for this did not turn up any relevant articles. There were some references to a failure in numpy installation but nothing concrete. Would appreciate any help in troubleshooting this! Thanks.
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AWS Lambda does not include Pandas/NumPy Python libraries by default.
The most frequent source of this error is that you haven't installed Pandas explicitly with pip install pandas . Alternatively, you may have different Python versions on your computer, and Pandas is not installed for the particular version you're using.
I would advise you to use Lambda layers to use additional libraries. The size of a lambda function package is limited, but layers can be used up to 250MB (more here).
AWS has open sourced a good package, including Pandas, for dealing with data in Lambdas. AWS has also packaged it making it convenient for Lambda layers. You can find instructions here.
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