diff options
Diffstat (limited to 'python.html.markdown')
| -rw-r--r-- | python.html.markdown | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/python.html.markdown b/python.html.markdown index b7d5895a..73963a3c 100644 --- a/python.html.markdown +++ b/python.html.markdown @@ -439,7 +439,10 @@ class Human(object): # A class attribute. It is shared by all instances of this class species = "H. sapiens" - # Basic initializer + # Basic initializer, this is called when this class is instantiated. + # Note that the double leading and trailing underscores denote objects + # or attributes that are used by python but that live in user-controlled + # namespaces. You should not invent such names on your own. def __init__(self, name): # Assign the argument to the instance's name attribute self.name = name @@ -526,10 +529,12 @@ def double_numbers(iterable): # Note xrange is a generator that does the same thing range does. # Creating a list 1-900000000 would take lot of time and space to be made. # xrange creates an xrange generator object instead of creating the entire list like range does. -_xrange = xrange(1, 900000000) +# We use a trailing underscore in variable names when we want to use a name that +# would normally collide with a python keyword +xrange_ = xrange(1, 900000000) # will double all numbers until a result >=30 found -for i in double_numbers(_xrange): +for i in double_numbers(xrange_): print(i) if i >= 30: break @@ -542,10 +547,10 @@ for i in double_numbers(_xrange): from functools import wraps -def beg(_say): - @wraps(_say) +def beg(target_function): + @wraps(target_function) def wrapper(*args, **kwargs): - msg, say_please = _say(*args, **kwargs) + msg, say_please = target_function(*args, **kwargs) if say_please: return "{} {}".format(msg, "Please! I am poor :(") return msg |