Antonio Kam anto [at] berkeley [dot] edu
anto [at] berkeley [dot] edu
map
filter
reduce
teaching.rouxl.es
[1, "hello", [2, "hi"]]
Syntax is lst[<start index>:<end index>:<step>]; this creates a copy of all or part of your list (will be important later)
lst[<start index>:<end index>:<step>]
start index
end index
step
lst = [3, 4, 5] lst[:] # Makes a copy; returns [3, 4, 5] lst[1:] # [4, 5] lst[::-1] # [5, 4, 3] lst[::2] # [3, 5]
for <variable> in <sequence>: [body of for loop]
Example:
lst = [3, 4, 5] for elem in lst: print(elem)
Very similar to for loops, but can be done in 1 line!
for
[<expression> for <variable> in <sequence> [if <condition>]] lst = [3, 2, 1] [x * 2 for x in lst if x < 3] # [4, 2] [x * 2 for x in [3, 2, 1]] # [6, 4, 2]
def tree(label, branches=[]): """Construct a tree with the given label value and a list of branches.""" return [label] + list(branches) # All items in branches must be trees! def label(tree): """Return the label value of a tree.""" return tree[0] def branches(tree): """Return the list of branches of the given tree.""" return tree[1:] def is_leaf(tree): return not branches(tree)
t = tree(1, [tree(3, [tree(4), tree(5), tree(6)]), tree(2)])
links.rouxl.es/disc
links.rouxl.es/feedback
Thanks for coming!
Please give me feedback on what to improve!