setup.py
def parse_requirements(fname='requirements.txt'):
    """
    Parse the package dependencies listed in a requirements file but strips
    specific versioning information.

    TODO:
        perhaps use https://github.com/davidfischer/requirements-parser instead

    CommandLine:
        python -c "import setup; print(setup.parse_requirements())"
    """
    from os.path import dirname, join, exists
    import re
    require_fpath = join(dirname(__file__), fname)

    def parse_line(line):
        """
        Parse information from a line in a requirements text file
        """
        info = {}
        if line.startswith('-e '):
            info['package'] = line.split('#egg=')[1]
        else:
            # Remove versioning from the package
            pat = '(' + '|'.join(['>=', '==', '>']) + ')'
            parts = re.split(pat, line, maxsplit=1)
            parts = [p.strip() for p in parts]

            info['package'] = parts[0]
            if len(parts) > 1:
                op, rest = parts[1:]
                if ';' in rest:
                    # Handle platform specific dependencies
                    # http://setuptools.readthedocs.io/en/latest/setuptools.html#declaring-platform-specific-dependencies
                    version, platform_deps = map(str.strip, rest.split(';'))
                    info['platform_deps'] = platform_deps
                else:
                    version = rest  # NOQA
                info['version'] = (op, version)
        return info

    # This breaks on pip install, so check that it exists.
    if exists(require_fpath):
        with open(require_fpath, 'r') as f:
            packages = []
            for line in f.readlines():
                line = line.strip()
                if line and not line.startswith('#'):
                    info = parse_line(line)
                    package = info['package']
                    if not sys.version.startswith('3.4'):
                        # apparently package_deps are broken in 3.4
                        platform_deps = info.get('platform_deps')
                        if platform_deps is not None:
                            package += ';' + platform_deps
                    packages.append(package)
            return packages
    return []
def parse_requirements(fname='requirements.txt'):
    """
    Parse the package dependencies listed in a requirements file but strips
    specific versioning information.

    TODO:
        perhaps use https://github.com/davidfischer/requirements-parser instead

    CommandLine:
        python -c "import setup; print(setup.parse_requirements())"
    """
    from os.path import dirname, join, exists
    import re
    require_fpath = join(dirname(__file__), fname)

    def parse_line(line):
        """
        Parse information from a line in a requirements text file
        """
        info = {}
        if line.startswith('-e '):
            info['package'] = line.split('#egg=')[1]
        else:
            # Remove versioning from the package
            pat = '(' + '|'.join(['>=', '==', '>']) + ')'
            parts = re.split(pat, line, maxsplit=1)
            parts = [p.strip() for p in parts]

            info['package'] = parts[0]
            if len(parts) > 1:
                op, rest = parts[1:]
                if ';' in rest:
                    # Handle platform specific dependencies
                    # http://setuptools.readthedocs.io/en/latest/setuptools.html#declaring-platform-specific-dependencies
                    version, platform_deps = map(str.strip, rest.split(';'))
                    info['platform_deps'] = platform_deps
                else:
                    version = rest  # NOQA
                info['version'] = (op, version)
        return info

    # This breaks on pip install, so check that it exists.
    if exists(require_fpath):
        with open(require_fpath, 'r') as f:
            packages = []
            for line in f.readlines():
                line = line.strip()
                if line and not line.startswith('#'):
                    info = parse_line(line)
                    package = info['package']
                    if not sys.version.startswith('3.4'):
                        # apparently package_deps are broken in 3.4
                        platform_deps = info.get('platform_deps')
                        if platform_deps is not None:
                            package += ';' + platform_deps
                    packages.append(package)
            return packages
    return []
Parse the package dependencies listed in a requirements file but strips
    specific versioning information.

    TODO:
        perhaps use https://github.com/davidfischer/requirements-parser instead

    CommandLine:
        python -c "import setup; print(setup.parse_requirements())"