AdvancedHTMLParser (8.0.1)nappdirs (1.4.3)nbeautifulsoup4 (4.6.0)nchardet (3.0.4)nchrome-gnome-shell (0.0.0)ncupshelpers (1.0)ncycler (0.10.0)nCython (0.27.3)

def get_installed_modules(self):
    data = subprocess.check_output(["pip", "list", "--local"])
    result = [tuple(line.replace('(', '').replace(')', '').split())
              for line in data.splitlines()]
    print(result)

TypeError: a bytes-like object is required, not 'str'

from pip.operations import freeze

modules = list(
    map(lambda x: x.split('=='), freeze.freeze(local_only=True))
)

print(modules)

[['aiodns', '1.1.1'],
 ['aiohttp', '1.2.0'],
 ['appdirs', '1.4.0'],
 ['appnope', '0.1.0'],
 ['argparse', '1.4.0'],
...

import pip

modules = []
for i in pip.utils.get_installed_distributions():
    modules.append((i.key, i.version))

print(modules)

[('pytreebank', '0.2.4'),
 ('cssselect', '1.0.1'),
 ('numba', '0.36.0.dev0+92.g2818dc9e2'),
 ('llvmlite', '0.0.0'),
 ('yarl', '0.8.1'),
 ('xlwt', '1.3.0'),
 ('xlrd', '1.1.0'),
 ...
]

import pip
pip.main(['list', 'local'])

>>> s = "AdvancedHTMLParser (8.0.1)nappdirs (1.4.3)nbeautifulsoup4 (4.6.0)nchardet (3.0.4)nchrome-gnome-shell (0.0.0)ncupshelpers (1.0)ncycler (0.10.0)nCython (0.27.3)"
>>> re.findall(r"(.+) ((.+))", s)
[('AdvancedHTMLParser', '8.0.1'),
 ('appdirs', '1.4.3'),
 ('beautifulsoup4', '4.6.0'),
 ('chardet', '3.0.4'),
 ('chrome-gnome-shell', '0.0.0'),
 ('cupshelpers', '1.0'),
 ('cycler', '0.10.0'),
 ('Cython', '0.27.3')]

data = 'AdvancedHTMLParser (8.0.1)nappdirs (1.4.3)nbeautifulsoup4 (4.6.0)nchardet (3.0.4)nchrome-gnome-shell (0.0.0)ncupshelpers (1.0)ncycler (0.10.0)nCython (0.27.3)'
result = [tuple(line.replace('(', '').replace(')', '').split())
          for line in data.splitlines()]

print(result)

[('AdvancedHTMLParser', '8.0.1'), ('appdirs', '1.4.3'), ('beautifulsoup4', '4.6.0'), ('chardet', '3.0.4'), ('chrome-gnome-shell', '0.0.0'), ('cupshelpers', '1.0'), ('cycler', '0.10.0'), ('Cython', '0.27.3')]

self.__all_modules = [tuple(x[:-1].split(" (")) for x in data.splitlines()]