Remove trailing whitespaces

etanot · etanot · commit 3c658d1b9d6f · 2021-09-10T23:53:31.000+05:30
This commit contains following fixes: - Trailing whitespace Usually, we don't want to have trailing whitespaces at end of line. It makes diff uglier and maintenance of code harder. - No newline at end of file Historically, POSIX standard requires to have a newline at the end of non-empty file, which shouldn't proceeds by a backslash[1]. [1]: https://gcc.gnu.org/legacy-ml/gcc/2003-11/msg01568.html
diff --git a/docs/classes.rst b/docs/classes.rst
@@ -469,7 +469,7 @@ The output:
 
 ::
 
-    $ python3 code/lenexample.py 
+    $ python3 code/lenexample.py
     Length of the f object is 5
 
 __contains__ method
@@ -587,7 +587,7 @@ Let us look at it in details in the following example.
 
         def can_sudo(self):
             return self.sudo
-    
+
     u = User("kdas", 1000, 1000, "/home/kdas", True)
     pprint(u.__dict__)
 
diff --git a/docs/click.rst b/docs/click.rst
@@ -71,7 +71,7 @@ is optional).
 
 ::
 
-    $ myhello 
+    $ myhello
     Hello World
     $ myhello --help
     Usage: myhello [OPTIONS]
@@ -160,7 +160,7 @@ option which will take a string as input.
     --help       Show this message and exit.
     $ myhello
     Hello World
-    Bye 
+    Bye
     $ myhello --name kushal
     Hello World
     Bye kushal
@@ -260,8 +260,8 @@ The output looks like below:
     --password TEXT
     --help           Show this message and exit.
     $ myhello
-    Password: 
-    Repeat for confirmation: 
+    Password:
+    Repeat for confirmation:
     Hello World
     We received hello as password.
 
@@ -305,4 +305,4 @@ The output looks like:
 
 Click has many other useful features, like *yes parameter*, *file path input*.
 I am not going to write about all of those here, but you can always from the
-`upstream documentation <http://click.pocoo.org/>`_.
+`upstream documentation <http://click.pocoo.org/>`_.
diff --git a/docs/datastructure.rst b/docs/datastructure.rst
@@ -78,7 +78,7 @@ We can store anything in the list, so first we are going to add another list  *b
 
 .. index:: sort
 
-Above you can see how we used the *a.extend()* method to extend the list. To sort any list we have *sort()* method. The *sort()* method will only work if elements in the list are comparable. We will remove the list b from the list and then sort. 
+Above you can see how we used the *a.extend()* method to extend the list. To sort any list we have *sort()* method. The *sort()* method will only work if elements in the list are comparable. We will remove the list b from the list and then sort.
 
 ::
 
@@ -525,7 +525,7 @@ changes the variable outside of the function.
 
     def modify(numbers):
         numbers.append(42)
-    
+
     modify(numbers)
     print(numbers)
     [1, 2, 4, 42]
diff --git a/docs/flask.rst b/docs/flask.rst
@@ -117,9 +117,9 @@ Put the following code in this file
                filename='hello.css')}}" />
  </head>
  <body>
-  
+
  It works!
-  
+
  </body>
  </html>
 
diff --git a/docs/functions.rst b/docs/functions.rst
@@ -244,7 +244,7 @@ From Python3.8, we can also mark any function to have only positional arguments.
 
     >>> def add(a, b, /):
     ...   return a + b
-    ... 
+    ...
     >>> add(2, 3)
     5
     >>> add(a=2, b=3)
@@ -351,7 +351,7 @@ number, we can do it easily like this.
 
 .. note:: To know more read `this link <http://docs.python.org/3/faq/programming.html#how-do-you-make-a-higher-order-function-in-python>`_.
 
-map 
+map
 ====
 
 `map` is a very useful class in python. It takes one function
@@ -388,7 +388,7 @@ In the above example, `name` and `age` are the parameters of the `hello`, and `k
 the arguments passed to the function.
 
 
-*args and **kwargs in function definition 
+*args and **kwargs in function definition
 =========================================
 
 There are times when we don't know the number of arguments before hand. There
@@ -406,12 +406,12 @@ This is where we use `*args` and `**kwargs` in the function.
         print(f"We received {len(kwargs)} keyword arguments. And they are:")
         for k, v in kwargs.items():
             print(f"key={k} and value={v}")
-        
-        
+
+
     unknown(30, 90, "kushal", lang="python", editor="vim")
 
     We received 3 positional arguments. And they are:
-    30 90 kushal 
+    30 90 kushal
     We received 2 keyword arguments. And they are:
     key=lang and value=python
     key=editor and value=vim
diff --git a/docs/hardwaresimulation.rst b/docs/hardwaresimulation.rst
@@ -4,7 +4,7 @@ Learning using hardware simulation
 ==================================
 
 From this section and in the future chapters, there will be examples and problems
-which is using a special device simulation in VS Code editor. 
+which is using a special device simulation in VS Code editor.
 
 We will use the simulation to have a `Circuit Playground Express device <https://adafruit.com/product/3333>`_,
 and learn to interact with the device. We will be able to turn on lights of different
diff --git a/docs/ifelse.rst b/docs/ifelse.rst
@@ -81,9 +81,9 @@ The elegant way to test Truth values is like
         pass
 
 .. warning:: Don't do this
-    
+
     ::
-    
+
         if x == True:
             pass
 
diff --git a/docs/loopingonhardware.rst b/docs/loopingonhardware.rst
@@ -12,7 +12,7 @@ One NeoPixel at a time
 
 .. figure:: img/oneneoatatime.gif
 
-The `cpx.pixels` can be accessed by index numbers, from 0 to 9. This way, we can turn on 
+The `cpx.pixels` can be accessed by index numbers, from 0 to 9. This way, we can turn on
 one NeoPixel at a time.
 
 .. code-block:: python
diff --git a/docs/modules.rst b/docs/modules.rst
@@ -56,7 +56,7 @@ Now we are going to see how modules work. Create a file called bars.py. Content
         Prints a bar with -
 
         :arg num: Length of the bar
-        
+
         """
         print("-" * num)
 
@@ -136,7 +136,7 @@ a single function from the module. Look at the following updated `bars.py` examp
         Prints a bar with -
 
         :arg num: Length of the bar
-        
+
         """
         print("-" * num)
 
@@ -164,7 +164,7 @@ the module from there. All imported modules are of type `module`.
     ['ANSWER', '__builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__', '__package__', '__spec__', 'hashbar', 'simplebar', 'starbar']
     >>> type(bars)
     <class 'module'>
-    >>> bars.__name__ 
+    >>> bars.__name__
     'bars'
     >>> bars.__file__
     '/home/kdas/code/pym/code/bars.py'
@@ -317,7 +317,7 @@ Using the *view_dir* example.
 ::
 
     >>> view_dir('/')
-    .readahead bin boot dev etc home junk lib lib64 lost+found media mnt opt 
+    .readahead bin boot dev etc home junk lib lib64 lost+found media mnt opt
     proc root run sbin srv sys tmp usr var
 
 
@@ -355,7 +355,7 @@ The *text* attribute holds the HTML returned by the server.
 Using this knowledge, let us write a command which can download a given file (URL) from Internet.
 
 
-.. code:: python 
+.. code:: python
 
     #!/usr/bin/env python3
     import os
@@ -383,7 +383,7 @@ Using this knowledge, let us write a command which can download a given file (UR
 
 
 Here we used something new, when the module name is *__main__*, then only
-ask for a user input and then download the given URL. This also prevents 
+ask for a user input and then download the given URL. This also prevents
 the same when some other Python code imports this file as a Python module.
 
 To learn more about requests module, go to their `wonderful documentation <http://docs.python-requests.org>`_.
diff --git a/docs/mu.rst b/docs/mu.rst
@@ -7,7 +7,7 @@ working on actual projects. In this chapter we will learn about **mu editor**,
 which is a very simple and beginner friendly editor for anyone starting with
 Python. It is developed by Nicholas Tollervey.
 
-If you already have an editor of your choice, you can skip this chapter. 
+If you already have an editor of your choice, you can skip this chapter.
 
 Installation
 =============
diff --git a/docs/projectstructure.rst b/docs/projectstructure.rst
@@ -271,7 +271,7 @@ First, we will have to install **twine** using **pip** (we are using a virtualen
     $ twine upload --repository-url https://test.pypi.org/legacy/ dist/*
     Uploading distributions to https://test.pypi.org/legacy/
     Enter your username: kushaldas
-    Enter your password: 
+    Enter your password:
     Uploading pymfactorial-0.1-py3-none-any.whl
     100%|██████████████████████████████████████| 4.29k/4.29k [00:01<00:00, 3.77kB/s]
     Uploading pymfactorial-0.1.tar.gz
diff --git a/docs/strings.rst b/docs/strings.rst
@@ -237,7 +237,7 @@ You can iterate over a string using simple `for` loop.
 
     >>> for ch in "Python":
     ...     print(ch)
-    ... 
+    ...
     P
     y
     t
diff --git a/docs/thebeginning.rst b/docs/thebeginning.rst
@@ -18,10 +18,10 @@ The following is from Fedora 32 machine.
 ::
 
 
-    Python 3.8.2rc1 (default, Feb 12 2020, 00:00:00) 
+    Python 3.8.2rc1 (default, Feb 12 2020, 00:00:00)
     [GCC 10.0.1 20200130 (Red Hat 10.0.1-0.7)] on linux
     Type "help", "copyright", "credits" or "license" for more information.
-    >>> 
+    >>>
 
 
 Using the Python interpreter
@@ -37,9 +37,9 @@ In our first code we are going to print "Hello World!" using the interpreter. To
 Using a source file
 =====================
 
-As a serious programmer, you might want to write the above code into a source file. Use any text editor you like to create the file called helloworld.py. I used vi. You can even use GUI based tools like `Kate <https://kate-editor.org/get-it/>` or `gedit <https://wiki.gnome.org/Apps/Gedit>`. 
+As a serious programmer, you might want to write the above code into a source file. Use any text editor you like to create the file called helloworld.py. I used vi. You can even use GUI based tools like `Kate <https://kate-editor.org/get-it/>` or `gedit <https://wiki.gnome.org/Apps/Gedit>`.
 
-Open a shell or terinal and perform these steps. 
+Open a shell or terinal and perform these steps.
 
 1. Enter the following text:
 
diff --git a/docs/virtualenv.rst b/docs/virtualenv.rst
@@ -53,7 +53,7 @@ So, now we will install a Python module called redis.
     (virt1)$ python3 -m pip install redis
     Collecting redis
       Downloading redis-2.10.5-py2.py3-none-any.whl (60kB)
-        100% |████████████████████████████████| 61kB 607kB/s 
+        100% |████████████████████████████████| 61kB 607kB/s
     Installing collected packages: redis
     Successfully installed redis-2.10.5
 
@@ -169,7 +169,7 @@ the following Python code in a file named *main.py*.
 ::
 
     $ pipenv shell
-    $ $ python main.py 
+    $ $ python main.py
     Your IP is 192.168.1.2
 
 Exiting from the virtualenv
