This article describes the standards that apply to variable names. All of the listed recommendations are mandatory unless noted otherwise.
Rules of Naming a Variable in Python:
- A variable name must start with a letter or the underscore character
- A variable name cannot start with a number
- A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ )
- Variable names are case-sensitive (age, Age, and AGE are three different variables)
# valid variable names
myV = 1
testVar = "var"
_thisVar = 20.2
_Thisvar = "testing"
Test_Var = "good"
TestVar = "testin"
# invalid variable names
-variable = 12
3variable = "badName"
my variable = "error"
Multiple Variable Assignment:
You can assign values to any number of variable in a single line, see the example below–
Example
x, y, z = 1, 2, 3
print(x)
print(y)
print(z)
Output
1
2
3
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