How to Convert Any Python Data Type to Boolean

Python’s bool() function converts a given argument to a Boolean value, returning False when called without an argument.

According to the documentation, the following values are considered false: the number 0, empty strings ( '' or ""), empty list [], empty tuple (), empty dictionary {}, empty set set(), and None. All other values evaluate to True, which internally are stored as 1 and 0 for true and false respectively.

bool(x)  # x: any object
# Examples
print(bool(100))          # True
print(bool(3.12))         # True
print(bool(0))            # False
print(bool("hello"))      # True
print(bool(''))           # False
print(bool([]))           # False
print(bool([12,34,7]))     # True
print(bool((32,45,67)))    # True
print(bool({}))            # False
print(bool(None))          # False

The list() constructor creates a list from an iterable, while tuple() creates a tuple from an iterable.

list(x)   # x: any iterable, returns a list
tuple(x)   # x: any iterable, returns a tuple

Implicit Boolean conversion occurs in expressions such as if statements. For example:

print(3 > 2)   # True
print(98 < 87) # False
num = 12
if num:         # num is implicitly True
    print("num is a number")

Understanding these conversion rules helps avoid logical errors when writing conditional logic in Python.