Simple python tricks

gistfile1.txt

# List to dict

a = [10, 20, 30]
b = {index: value for index, value in enumerate(a)}
#   {0: 10, 1: 20, 2: 30}

a = ["a", 1, "b", 2, "c", 3]
b = {a[i]: a[i + 1] for i in range(0, len(a), 2)}
#   {"a": 1, "b": 2, "c": 3}

a = ["apple", "banana", "cherry"]
b = {value: len(value) for value in a}
#   {'apple': 5, 'banana': 6, 'cherry': 6}