Converting Snake Case to Lower Camel Case (lowerCamelCase)

def to_camel_case(snake_str):
    components = snake_str.split('_')
    # We capitalize the first letter of each component except the first one
    # with the 'title' method and join them together.
    return components[0] + ''.join(x.title() for x in components[1:])

Example:

In [11]: to_camel_case('snake_case')
Out[11]: 'snakeCase'