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William Mantly 2016-01-20 00:23:59 -05:00
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@ -63,20 +63,20 @@ turtles = ["Raph", "Leo", "Mickey", "Donny"]
* Collections of key, value pairs * Collections of key, value pairs
* python type `dict()` or the literal `{'key':'value'}` * python type `dict()` or the literal `{'key':'value'}`
* methods to know * methods to know
`.get()` return the value of a give key, or a default value if its not found * `.get()` return the value of a give key, or a default value if its not found
`.values()` returns a `list` of values in the Dictionary * `.values()` returns a `list` of values in the Dictionary
`.keys()` returns a `list` of keys in the Dictionary * `.keys()` returns a `list` of keys in the Dictionary
* [Booleans](https://docs.python.org/3/library/stdtypes.html#boolean-values) * [Booleans](https://docs.python.org/3/library/stdtypes.html#boolean-values)
* Represents something that is `True` or `False` * Represents something that is `True` or `False`
* python type 'bool()' or the literal 'True' * python type `bool()` or the literal `True` or `False`
* [Range](https://docs.python.org/3/library/stdtypes.html#range) * [Range](https://docs.python.org/3/library/stdtypes.html#range)
* `Range` is a special type that represents range of numbers * `Range()` is a special type that represents range of numbers
* [None](https://docs.python.org/3/library/stdtypes.html#the-null-object) * [None](https://docs.python.org/3/library/stdtypes.html#the-null-object)
* nothing, nothing at all * nothing, nothing at all
* python type ... there inst one only the literal `None` * python type ... there is one way, the literal way `None`
### Notable built in functions ### Notable built in functions
* `len()` return the length of the given sequence * `len()` return the length of the given *sequence*
* `help()` shows help documentation of the given object * `help()` shows help documentation of the given object
* `dir()` show the available methods of the give object * `dir()` show the available methods of the give object
@ -99,7 +99,7 @@ Python comes with the following symbols for mathematical operators.
* `!=` not equal * `!=` not equal
* `<` less then * `<` less then
* `<=` less then or equal to * `<=` less then or equal to
* > greater then * `>` greater then
* `>=` greater then or equal to * `>=` greater then or equal to
@ -107,7 +107,7 @@ Python comes with the following symbols for mathematical operators.
* Now we have reached `if/else` statements * Now we have reached `if/else` statements
* If an expression you passed in is `True` do something * If an expression you passed in is `True` do something
* Else do something else * `else` do something `else`
```python ```python
if expression == true: if expression == true:
@ -126,7 +126,7 @@ else:
print("Your number is puny") print("Your number is puny")
``` ```
* Things to note * Things to note
* Put a colon after the expression you want to evaluate * Put a colon after the expression you want to evaluate to start the `if` body
* `if` to `elif` to `else` * `if` to `elif` to `else`
* indents show what code is part of the body of the statement and where it ends * indents show what code is part of the body of the statement and where it ends