Control Flow
Generators in Python
Generators are functions used to create an iterable sequence of values.
Syntax
def generator_name(params):
some_type_of_loop
yield value #value returned on each loop iteration
#for each through generator
for i in generator_name()
#execute code for each i
#storing a generator and iterating
generator_variable = generator_name()
generator_variable.next()
#generator expression (similar to list comprehension but returns a generator)
generator = (var_with_operations for var in some_list boolean_expression)Notes
The yield line is used to return the value on each iteration.
Example
def square_numbers():
i = 1
while True:
yield i**2
i = i + 1