What is a good practice to check if an environmental variable exists or not? What is a good practice to check if an environmental variable exists or not? python-3.x python-3.x
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What is a good practice to check if an environmental variable exists or not?
python
python-2.7
python-3.x
if-statement
environment-variables
lien
python-3.x
Does Python have a cleaner way to express "if x contains a|b|c|d..."? [duplicate]
python
if-statement
python-3.x
substring
lien
python-3.x
Why does ... == True return False in Python 3?
python
python-3.x
if-statement
truthiness
lien
python-3.x
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