import os
import re

def load_to_environment(env_file_path):
    """
    Tries to load variables to environment from a .env file
    It does *not* throw an exception if the file is not found
    """
    try:
        with open(env_file_path) as f:
            content = f.read()
    except IOError:
        content = ''

    for line in content.splitlines():
        m1 = re.match(r'\A([A-Za-z_0-9]+)\w*=\w*(.*)\Z', line)
        if m1:
            key, val = m1.group(1), m1.group(2)
            m2 = re.match(r"\A'(.*)'\Z", val)
            if m2:
                val = m2.group(1)
            m3 = re.match(r'\A"(.*)"\Z', val)
            if m3:
                val = re.sub(r'\\(.)', r'\1', m3.group(1))
            os.environ.setdefault(key, val)
import os
import re

def load_to_environment(env_file_path):
    """
    Tries to load variables to environment from a .env file
    It does *not* throw an exception if the file is not found
    """
    try:
        with open(env_file_path) as f:
            content = f.read()
    except IOError:
        content = ''

    for line in content.splitlines():
        m1 = re.match(r'\A([A-Za-z_0-9]+)\s*=\s*(.*)\Z', line)
        if m1:
            key, val = m1.group(1), m1.group(2)
            m2 = re.match(r"\A'(.*)'\Z", val)
            if m2:
                val = m2.group(1)
            m3 = re.match(r'\A"(.*)"\Z', val)
            if m3:
                val = re.sub(r'\\(.)', r'\1', m3.group(1))
            os.environ.setdefault(key, val)
Fix .env file parsing