pip show <insert_package_name_here>| grep ^Requires

for NAME in $(pip list|cut -d' ' -f1); do REQ=$(pip show $NAME| grep Requires); if [[ "$REQ" =~ "$REQUIRES" ]]; then echo $REQ;echo "Package: $NAME"; echo "---" ; fi;  done

REQUIRES=django

pip freeze | cut -f 1 -d'=' |  xargs -L1 pip show

import os
import re

package = 'numpy'
regex = re.compile('.*{}($|,).*'.format(package))

def chunks(l, n): return [l[i:i+n] for i in range(0, len(l), n)]

cmd = "pip freeze | cut -f 1 -d'=' |  xargs -L1 pip show"
packages = os.popen(cmd).read()
pkg_infos = chunks(packages.splitlines(), 5)
print 'n'.join(x[1][6:] for x in filter(lambda x: regex.match(x[-1]), pkg_infos))

cat requirements.txt | grep -v git | sed 's/==.*//' | xargs -I % echo 'pip show % 2>/dev/null | grep Requires | grep -q funcsigs && echo %' | sh