Welcome to MadPy!
Organizers¶
 |
 |
 |
Ed Rogers |
David Hoese |
Josh Karpel |
Code of Conduct¶
MadPy is a community group and open to all experience levels. We are committed to a safe, professional environment
Our Commitment to You¶
We are enthusiastically focused on improving our event and making it a place that is welcoming to all. All reports will be taken seriously, handled respectfully, and dealt with in a timely manner.
Learn more about the MadPy Code of Conduct:
Python Warm-Up¶
Calling Yield Multiple Times¶
In [1]:
def some_things():
yield 1
yield 2
yield 3
In [2]:
def them():
for thing in some_things():
yield thing
What happens when we call list(them())?
In [3]:
list(them())
Out[3]:
[1, 2, 3]
Changing them() to return a list instead of a generator¶
In [4]:
def some_things_as_a_list():
return list(some_things())
In [5]:
def them():
return some_things_as_a_list() # Using return
# instead of the yield call
for thing in some_things():
yield thing
What will list(them()) return?
In [6]:
list(them())
Out[6]:
[]
Taking a closer look at them()¶
In [7]:
def them():
return some_things_as_a_list()
# for thing in some_things():
# yield thing
In [8]:
list(them())
Out[8]:
[1, 2, 3]
Because yield appears in the function body, Python compiles them as a generator function — at compile time, before any code runs.
Calling them() returns a generator object without executing anything. The return value is silently ignored during iteration.
