update setup.py to support install from source before numpy is installed

lancopku / pkuseg-python

pkuseg多领域中文分词工具; The pkuseg toolkit for multi-domain Chinese word segmentation

MIT License

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update setup.py to support install from source before numpy is installed #141

Open SagiMedina opened 3 years ago

SagiMedina commented 3 years ago

Hey, First, thanks for your work! This PR fixes a bug when no wheel installer is available and installing from source requires pre-installed requirements.