Magic Methods
| Method | Purpose | Example Usage |
|---|
__init__ | Initializes object attributes during instantiation. | p = Person("Alice", 25) |
__lt__ | Defines behavior for < operator for custom objects. | print(n1 < n2) |
__str__ | Returns a human-readable string representation of an object. | print(p) or str(p) |
- Methods starting and ending with double underscores. They are defined by built-in classes in Python and commonly used for operator overloading
- For more examples, see docs
Count Occurrences of Elements
from collections import Counter
# Count characters in a string
Counter("banana")
# Output: Counter({'a': 3, 'n': 2, 'b': 1})
# Count characters in a string
Counter([1, 2, 2, 3, 3, 3])
# Output: Counter({3: 3, 2: 2, 1: 1})
# Most Common Elements
Counter([1,1,1,2,2,3,4,5,6]).most_common(2)
# Output: [(1, 3), (2, 2)]
Throwaway Variable
for _ in range(k):
print("This will print k times")
_ is the throwaway variable. This is a way to indicate to other developers that the loop variable is intentionally not going to be used.
