Why pandas is not installed in docker?

I use the pandas package from Alpine to build a docker image. But when I run python script, it said ModuleNotFoundError: No module named 'pandas'.

FROM alpine:latest

ADD crontab.txt /crontab.txt
ADD script.sh /script.sh
COPY entry.sh
/entry.sh ADD requirements.txt /requirements.txt
COPY /centaline/scrapCentaline.py /scrapCentaline.py
COPY /midland/scrapMidland.py /scrapMidland.py COPY torrc /etc/tor/torrc

RUN chmod 755 /script.sh /entry.sh RUN /usr/bin/crontab /crontab.txt

RUN echo “http://dl-8.alpinelinux.org/alpine/edge/testing” >>
/etc/apk/repositories && apk update && apk add –no-cache python3
py-pip py3-setuptools python-dev py3-numpy py3-pandas

RUN apk –update add –no-cache lapack-dev gcc freetype-dev
tor torsocks

RUN apk add –no-cache –virtual .build-deps gfortran musl-dev
g++ RUN ln -s /usr/include/locale.h /usr/include/xlocale.h

RUN pip3 install aiohttp pymongo requests stem fake-useragent
aiohttp_socks

EXPOSE 9050 EXPOSE 9051

CMD [“/entry.sh”]

Source: StackOverflow