Easy way to check that a variable is defined in python?
40229
How do I check if a variable exists?
37735
How can I check for "undefined" in JavaScript?
97240
How can I check if a string represents an int, without using try/except?
35503
Understanding Python's "is" operator
4684
What's the canonical way to check for type in Python?
94841
How can I compare a dynamic variable with a literal in Mathematica?
137660
Avoid running the script if a variable is not defined
123815
How to find JavaScript variable by its name
117638
check if a file is open in Python
56724
How do I check that a number is float or integer?
72392
Checking to see if a DateTime variable has had a value assigned
105797
Why can't we define a variable inside an if statement?
90853
How can I compare multiple variables to a single condition?
128503
Expand scope of a variable initialized in a if/else sequence
149101
Find functions explicitly defined in a module (python)
5846
Python : Assert that variable is instance method?
85962
Programmatically determining amount of parameters a function requires - Python