How do I access environment variables in Python?
You can access environment variables in Python using the
Here's an example:
import os # Access an environment variable value = os.environ['VARIABLE_NAME'] # Set an environment variable os.environ['VARIABLE_NAME'] = 'value'
You can also use the
os.getenv function to get the value of an environment variable. This function takes the name of the environment variable as an argument and returns the value of the variable as a string:
import os value = os.getenv('VARIABLE_NAME')
If the environment variable is not set,
None. You can also specify a default value to be returned if the environment variable is not set:
import os value = os.getenv('VARIABLE_NAME', 'default_value')
This can be useful if you want to use a default value if the environment variable is not set.
How do I execute a program or call a system command in Python?
In Python, you can execute a system command using the os.system. However, subprocess.run is a much better alternative. The official also documentation recommends subprocess.run over the os.system. ...Questions
What does the "yield" keyword do in Python?
To better understand what yield does, you need first to understand what generator and iterable are. What is iterable When you use a list or list-like structure, you can read the values from the lis...Questions
What does ** and * do for parameters in Python?
In Python, the * symbol is used to indicate that an argument can be passed to a function as a tuple. The ``** symbol is used to indicate that an argument can be passed to a function as a dictionary...Questions
How do I get the current time in Python?
There are two ways you can get the current time in python. using the datetime object using the time module Using the datetime object First, you need to import the datetime module. Then by calling t...Questions
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