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Q&A Load environment variables from .env file in Python 3 [closed]

In Python 2, I was able to create a file named .env within a project folder like so: # .env MY_ID=abc123 TOKEN=4567890 Then in a Python file in the same directory, I could read these variable...

0 answers · posted 3y ago by qohelet‭ · closed 2y ago by Alexei‭

Question python python-3 environment-variables

#6: Question closed by

Alexei‭ · 2022-05-01T06:12:35Z (over 2 years ago)

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#5: Post edited by

hkotsubo‭ · 2022-02-02T15:56:00Z (almost 3 years ago)
fix quotes in code, minor fixes in formatting

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Load environment variables from .env file in Python 3

In Python 2, I was able to create a file named `.env` within a project folder like so:
# .env
MY_ID=abc123
TOKEN=4567890
Then in a Python file in the same directory, I could read these variables like so:
# example.py
import os
~~id = os.environ[“MY_ID”]~~
~~token = os.environ[“TOKEN”]~~
This would work fine and load these variables from the file automatically when run.
~~In Python 3, this is not working (I get a KeyError when trying to read the first environment variable),~~
So instead I tried to use the `python-dotenv` package to load the variables like so:
# example.py
import os
from dotenv import load_dotenv
load_dotenv()
id = os.environ[“MY_ID”]
token = os.environ[“TOKEN”]
~~But this still results in a KeyError.~~
Trying `os.getenv()` instead of `os.environ()` (as I saw in forum postings) results in `TypeError: 'function' object is not subscriptable`.
Is there a simple way to read these variables as environment variables from a `.env` file using this paradigm or do I need to implement a custom config in Python 3?

In Python 2, I was able to create a file named `.env` within a project folder like so:
# .env
MY_ID=abc123
TOKEN=4567890
Then in a Python file in the same directory, I could read these variables like so:
# example.py
import os
id = os.environ["MY_ID"]
token = os.environ["TOKEN"]
This would work fine and load these variables from the file automatically when run.
In Python 3, this is not working (I get a `KeyError` when trying to read the first environment variable),
So instead I tried to use the `python-dotenv` package to load the variables like so:
# example.py
import os
from dotenv import load_dotenv
load_dotenv()
id = os.environ[“MY_ID”]
token = os.environ[“TOKEN”]
But this still results in a `KeyError`.
Trying `os.getenv()` instead of `os.environ()` (as I saw in forum postings) results in `TypeError: 'function' object is not subscriptable`.
Is there a simple way to read these variables as environment variables from a `.env` file using this paradigm or do I need to implement a custom config in Python 3?

#4: Post edited by

Alexei‭ · 2022-02-02T10:40:05Z (almost 3 years ago)
added relevant tag

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python python-3

python python-3 environment-variables

#3: Post edited by

qohelet‭ · 2022-02-02T09:16:37Z (almost 3 years ago)

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In Python 2, I was able to create a file named `.env` within a project folder like so:
# .env
MY_ID=abc123
TOKEN=4567890
Then in a Python file in the same directory, I could read these variables like so:
# example.py
import os
id = os.environ[“MY_ID”]
token = os.environ[“TOKEN”]
This would work fine and load these variables from the file automatically when run.
In Python 3, this is not working (I get a KeyError when trying to read the first environment variable),
So instead I tried to use the `python-dotenv` package to load the variables like so:
# example.py
import os
from dotenv import load_dotenv
load_dotenv()
id = os.environ[“MY_ID”]
token = os.environ[“TOKEN”]
~~But this still results in a KeyError (`raise KeyError(key) from None`).~~
~~Trying `os.getenv()` instead of `os.environ()` results in `TypeError: 'function' object is not subscriptable`.~~

In Python 2, I was able to create a file named `.env` within a project folder like so:
# .env
MY_ID=abc123
TOKEN=4567890
Then in a Python file in the same directory, I could read these variables like so:
# example.py
import os
id = os.environ[“MY_ID”]
token = os.environ[“TOKEN”]
This would work fine and load these variables from the file automatically when run.
In Python 3, this is not working (I get a KeyError when trying to read the first environment variable),
So instead I tried to use the `python-dotenv` package to load the variables like so:
# example.py
import os
from dotenv import load_dotenv
load_dotenv()
id = os.environ[“MY_ID”]
token = os.environ[“TOKEN”]
But this still results in a KeyError.
Trying `os.getenv()` instead of `os.environ()` (as I saw in forum postings) results in `TypeError: 'function' object is not subscriptable`.
Is there a simple way to read these variables as environment variables from a `.env` file using this paradigm or do I need to implement a custom config in Python 3?

#2: Post edited by

qohelet‭ · 2022-02-02T09:14:39Z (almost 3 years ago)

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In Python 2, I was able to create a file named `.env` within a project folder like so:
# .env
MY_ID=abc123
TOKEN=4567890
Then in a Python file in the same directory, I could read these variables like so:
# example.py
import os
id = os.environ[“MY_ID”]
token = os.environ[“TOKEN”]
This would work fine and load these variables from the file automatically when run.
In Python 3, this is not working (I get a KeyError when trying to read the first environment variable),
So instead I tried to use the `python-dotenv` package to load the variables like so:
# example.py
import os
from dotenv import load_dotenv
load_dotenv()
id = os.environ[“MY_ID”]
token = os.environ[“TOKEN”]
~~But this still results in a KeyError (`raise KeyError(key) from None`).~~

In Python 2, I was able to create a file named `.env` within a project folder like so:
# .env
MY_ID=abc123
TOKEN=4567890
Then in a Python file in the same directory, I could read these variables like so:
# example.py
import os
id = os.environ[“MY_ID”]
token = os.environ[“TOKEN”]
This would work fine and load these variables from the file automatically when run.
In Python 3, this is not working (I get a KeyError when trying to read the first environment variable),
So instead I tried to use the `python-dotenv` package to load the variables like so:
# example.py
import os
from dotenv import load_dotenv
load_dotenv()
id = os.environ[“MY_ID”]
token = os.environ[“TOKEN”]
But this still results in a KeyError (`raise KeyError(key) from None`).
Trying `os.getenv()` instead of `os.environ()` results in `TypeError: 'function' object is not subscriptable`.

#1: Initial revision by

qohelet‭ · 2022-02-02T09:13:13Z (almost 3 years ago)

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Load environment variables from .env file in Python 3

In Python 2, I was able to create a file named `.env` within a project folder like so:

    # .env
    MY_ID=abc123
    TOKEN=4567890

Then in a Python file in the same directory, I could read these variables like so:

    # example.py
    import os

    id = os.environ[“MY_ID”]
    token = os.environ[“TOKEN”]

This would work fine and load these variables from the file automatically when run.

In Python 3, this is not working (I get a KeyError when trying to read the first environment variable),

So instead I tried to use the `python-dotenv` package to load the variables like so:

    # example.py
    import os
    from dotenv import load_dotenv

    load_dotenv()

    id = os.environ[“MY_ID”]
    token = os.environ[“TOKEN”]

But this still results in a KeyError (`raise KeyError(key) from None`).

python python-3

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