diff options
Diffstat (limited to 'python3.html.markdown')
| -rw-r--r-- | python3.html.markdown | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/python3.html.markdown b/python3.html.markdown index 6b3486a6..9ce7790b 100644 --- a/python3.html.markdown +++ b/python3.html.markdown @@ -38,7 +38,7 @@ Note: This article applies to Python 3 specifically. Check out [here](http://lea 8 - 1 # => 7 10 * 2 # => 20 -# Except division which returns floats, real numbers, by default +# Except division which defaults to rounding down 35 / 5 # => 7.0 # Result of integer division truncated down both for positive and negative. @@ -47,8 +47,12 @@ Note: This article applies to Python 3 specifically. Check out [here](http://lea -5 // 3 # => -2 -5.0 // 3.0 # => -2.0 -# When you use a float, results are floats -3 * 2.0 # => 6.0 +# When one of the inputs is a float, result is a float +10.0 / 3 # => 3.3333333333333335 + +# to force this behavior on integers, use +from __future__ import division +10 / 3 # => 3.3333333333333335 # Modulo operation 7 % 3 # => 1 @@ -602,7 +606,7 @@ list(filter(lambda x: x > 5, [3, 4, 5, 6, 7])) # => [6, 7] [x for x in [3, 4, 5, 6, 7] if x > 5] # => [6, 7] # You can construct set and dict comprehensions as well. -{x for x in 'abcddeef' if x in 'abc'} # => {'d', 'e', 'f'} +{x for x in 'abcddeef' if x not in 'abc'} # => {'d', 'e', 'f'} {x: x**2 for x in range(5)} # => {0: 0, 1: 1, 2: 4, 3: 9, 4: 16} @@ -761,8 +765,13 @@ if __name__ == '__main__': print(b.say('hello')) print(b.fly) +# To take advantage of modularization by file you could place the classes above in their own files, +# say, human.py and bat.py +# to import functions from other files use the following format # from "filename-without-extension" import "function-or-class" + +# superhero.py from human import Human from bat import Bat @@ -887,21 +896,14 @@ print(say(say_please=True)) # Can you buy me a beer? Please! I am poor :( ### Free Online * [Automate the Boring Stuff with Python](https://automatetheboringstuff.com) -* [Learn Python The Hard Way](http://learnpythonthehardway.org/book/) -* [Dive Into Python](http://www.diveintopython.net/) * [Ideas for Python Projects](http://pythonpracticeprojects.com) * [The Official Docs](http://docs.python.org/3/) * [Hitchhiker's Guide to Python](http://docs.python-guide.org/en/latest/) -* [A Crash Course in Python for Scientists](http://nbviewer.ipython.org/5920182) * [Python Course](http://www.python-course.eu/index.php) * [First Steps With Python](https://realpython.com/learn/python-first-steps/) * [A curated list of awesome Python frameworks, libraries and software](https://github.com/vinta/awesome-python) * [30 Python Language Features and Tricks You May Not Know About](http://sahandsaba.com/thirty-python-language-features-and-tricks-you-may-not-know.html) * [Official Style Guide for Python](https://www.python.org/dev/peps/pep-0008/) * [Python 3 Computer Science Circles](http://cscircles.cemc.uwaterloo.ca/) - -### Dead Tree - -* [Programming Python](http://www.amazon.com/gp/product/0596158106/ref=as_li_qf_sp_asin_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0596158106&linkCode=as2&tag=homebits04-20) -* [Dive Into Python](http://www.amazon.com/gp/product/1441413022/ref=as_li_tf_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1441413022&linkCode=as2&tag=homebits04-20) -* [Python Essential Reference](http://www.amazon.com/gp/product/0672329786/ref=as_li_tf_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0672329786&linkCode=as2&tag=homebits04-20) +* [Dive Into Python 3](http://www.diveintopython3.net/index.html) +* [A Crash Course in Python for Scientists](http://nbviewer.jupyter.org/gist/anonymous/5924718) |