Added Python code snippets

Author: Corey Schafer

.gitignore

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+.DS_Store
+
+# Video Scripts
+s.txt
+script.txt

Atom-Python/Test-Project/test-module.py

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+
+class Employee:
+    """A sample Employee class"""
+
+    def __init__(self, first, last):
+        self.first = first
+        self.last = last
+
+        print('Created Employee: {} - {}'.format(self.fullname, self.email))
+
+    @property
+    def email(self):
+        return '{}.{}@email.com'.format(self.first, self.last)
+
+    @property
+    def fullname(self):
+        return '{} {}'.format(self.first, self.last)
+
+
+emp_1 = Employee('John', 'Smith')

Automation/rename.py

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+import os
+
+os.chdir('/path/to/files/')
+
+# Am I in the correct directory?
+# print(os.getcwd())
+
+# print(dir(os))
+
+# Print all the current file names
+for f in os.listdir():
+    # If .DS_Store file is created, ignore it
+    if f == '.DS_Store':
+        continue
+
+    file_name, file_ext = os.path.splitext(f)
+    # print(file_name)
+
+    # One way to do this
+    f_title, f_course, f_number = file_name.split('-')
+
+    # print('{}-{}-{}{}'.format(f_number, f_course, f_title, file_ext))
+
+    # Need to remove whitespace
+    f_title = f_title.strip()
+    f_course = f_course.strip()
+    # f_number = f_number.strip()
+
+    # Want to remove the number sign?
+    # f_number = f_number.strip()[1:]
+
+    # One thing I noticed about this output is that if it was sorted by filename
+    # then the 1 and 10 would be next to each other. How do we fix this? One way we can fix this is to pad
+    # the numbers. So instead of 1, we'll make it 01. If we had hundreds of files then this would maybe need to be 001.
+    # We can do this in Python with zfill
+    f_number = f_number.strip()[1:].zfill(2)
+
+    # print('{}-{}-{}{}'.format(f_number, f_course, f_title, file_ext))
+
+    # You have the power to reformat in any way you see fit
+    print('{}-{}{}'.format(f_number, f_title.strip(), file_ext.strip()))
+
+    new_name = '{}-{}{}'.format(file_num, file_title, file_ext)
+
+    os.rename(fn, new_name)
+
+
+# print(len(os.listdir()))

Closures/closure.js

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+
+function html_tag(tag){
+  function wrap_text(msg){
+    console.log('<' + tag +'>' + msg + '</' + tag + '>')
+  }
+  return wrap_text
+}
+
+print_h1 = html_tag('h1')
+
+print_h1('Test Headline!')
+print_h1('Another Headline!')
+
+
+print_p = html_tag('p')
+print_p('Test Paragraph!')

Closures/closure.py

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+
+# Closures
+
+import logging
+logging.basicConfig(filename='example.log', level=logging.INFO)
+
+
+def logger(func):
+    def log_func(*args):
+        logging.info(
+            'Running "{}" with arguments {}'.format(func.__name__, args))
+        print(func(*args))
+    return log_func
+
+
+def add(x, y):
+    return x+y
+
+
+def sub(x, y):
+    return x-y
+
+add_logger = logger(add)
+sub_logger = logger(sub)
+
+add_logger(3, 3)
+add_logger(4, 5)
+
+sub_logger(10, 5)
+sub_logger(20, 10)

Closures/example.log

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+INFO:root:Running "add" with arguments (3, 3)
+INFO:root:Running "add" with arguments (4, 5)
+INFO:root:Running "sub" with arguments (10, 5)
+INFO:root:Running "sub" with arguments (20, 10)

Datetime/dates.py

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+import datetime
+import pytz
+
+# Naive
+# d = datetime.date(2001, 9, 11)
+
+tday = datetime.date.today()
+
+
+# weekday() - Monday is 0 and Sunday is 6
+# print(tday)
+
+# isoweekday() - Monday is 1 and Sunday is 7
+# print(tday)
+
+
+# datetime.timedelta(days=0, seconds=0, microseconds=0, milliseconds=0, minutes=0, hours=0, weeks=0)
+
+tdelta = datetime.timedelta(hours=12)
+
+# print(tday + tdelta)
+
+# date2 = date1 + timedelta
+# timedelta = date1 + date2
+
+bday = datetime.date(2016, 9, 24)
+
+till_bday = bday - tday
+
+# print(till_bday.days)
+
+t = datetime.time(9, 30, 45, 100000)
+
+# dt = datetime.datetime.today()
+# dtnow = datetime.datetime.now()
+# print(dir(datetime.datetime))
+# print(dt)
+# print(dtnow)
+
+dt = datetime.datetime(2016, 7, 24, 12, 30, 45, tzinfo=pytz.UTC)
+# print(dir(dt))
+
+dt_utcnow = datetime.datetime.now(tz=pytz.UTC)
+# print(dt_utcnow)
+
+dt_utcnow2 = datetime.datetime.utcnow().replace(tzinfo=pytz.UTC)
+# print(dt_utcnow2)
+
+# dt_mtn = dt_utcnow.astimezone(pytz.timezone('US/Mountain'))
+# print(dt_mtn)
+
+dt_mtn = datetime.datetime.now()
+
+mtn_tz = pytz.timezone('US/Mountain')
+dt_mtn = mtn_tz.localize(dt_mtn)
+
+# print(dt_mtn)
+
+dt_east = dt_mtn.astimezone(pytz.timezone('US/Eastern'))
+# print(dt_east)
+
+print(dt_mtn.strftime('%B %d, %Y'))
+
+dt_str = 'July 24, 2016'
+dt = datetime.datetime.strptime(dt_str, '%B %d, %Y')
+print(dt)
+
+# strftime - Datetime to String
+# strptime - String to Datetime

Decorators/decorators.py

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+# Decorators
+from functools import wraps
+
+
+def my_logger(orig_func):
+    import logging
+    logging.basicConfig(filename='{}.log'.format(orig_func.__name__), level=logging.INFO)
+
+    @wraps(orig_func)
+    def wrapper(*args, **kwargs):
+        logging.info(
+            'Ran with args: {}, and kwargs: {}'.format(args, kwargs))
+        return orig_func(*args, **kwargs)
+
+    return wrapper
+
+
+def my_timer(orig_func):
+    import time
+
+    @wraps(orig_func)
+    def wrapper(*args, **kwargs):
+        t1 = time.time()
+        result = orig_func(*args, **kwargs)
+        t2 = time.time() - t1
+        print('{} ran in: {} sec'.format(orig_func.__name__, t2))
+        return result
+
+    return wrapper
+
+import time
+
+
+@my_logger
+@my_timer
+def display_info(name, age):
+    time.sleep(1)
+    print('display_info ran with arguments ({}, {})'.format(name, age))
+
+display_info('Tom', 22)

Decorators/snippets.txt

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+
+
+
+
+class decorator_class(object):
+
+    def __init__(self, original_function):
+        self.original_function = original_function
+
+    def __call__(self, *args, **kwargs):
+        print('call method before {}'.format(self.original_function.__name__))
+        self.original_function(*args, **kwargs)
+
+
+# Practical Examples
+
+def my_logger(orig_func):
+    import logging
+    logging.basicConfig(filename='{}.log'.format(orig_func.__name__), level=logging.INFO)
+
+    def wrapper(*args, **kwargs):
+        logging.info(
+            'Ran with args: {}, and kwargs: {}'.format(args, kwargs))
+        return orig_func(*args, **kwargs)
+
+    return wrapper
+
+
+def my_timer(orig_func):
+    import time
+
+    def wrapper(*args, **kwargs):
+        t1 = time.time()
+        result = orig_func(*args, **kwargs)
+        t2 = time.time() - t1
+        print('{} ran in: {} sec'.format(orig_func.__name__, t2))
+        return result
+
+    return wrapper
+
+import time

EAFP/eafp.py

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+# Duck Typing and Easier to ask forgiveness than permission (EAFP)
+
+
+class Duck:
+
+    def quack(self):
+        print('Quack, quack')
+
+    def fly(self):
+        print('Flap, Flap!')
+
+
+class Person:
+
+    def quack(self):
+        print("I'm Quacking Like a Duck!")
+
+    def fly(self):
+        print("I'm Flapping my Arms!")
+
+
+def quack_and_fly(thing):
+    pass
+    # Not Duck-Typed (Non-Pythonic)
+    # if isinstance(thing, Duck):
+    #     thing.quack()
+    #     thing.fly()
+    # else:
+    #     print('This has to be a Duck!')
+
+    # LBYL (Non-Pythonic)
+    # if hasattr(thing, 'quack'):
+    #     if callable(thing.quack):
+    #         thing.quack()
+
+    # if hasattr(thing, 'fly'):
+    #     if callable(thing.fly):
+    #         thing.fly()
+
+    #     try:
+    #         thing.quack()
+    #         thing.fly()
+    #         thing.bark()
+    #     except AttributeError as e:
+    #         print(e)
+
+d = Duck()
+
+print(type(dir(d)))

Ex-Machina/ex-machina.py

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+#BlueBook code decryption
+import sys
+def sieve(n):
+    x = [1] * n
+    x[1] = 0
+    for i in range(2,n/2):
+            j = 2 * i
+            while j < n:
+                    x[j]=0
+                    j = j+i
+    return x
+
+def prime(n,x):
+    i = 1
+    j = 1
+    while j <= n:
+            if x[i] == 1:
+                    j = j + 1
+            i = i + 1
+    return i - 1
+x=sieve(10000)
+code = [1206,301,384,5]
+key =[1,1,2,2,]
+
+sys.stdout.write("".join(chr(i) for i in [73,83,66,78,32,61,32]))
+for i in range (0,4):
+    sys.stdout.write(str(prime(code[i],x)-key[i]))
+
+print

Exceptions/currupt_file.txt

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+Currupt File!

Exceptions/exceptions.py

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+
+try:
+    f = open('curruptfile.txt')
+    # if f.name == 'currupt_file.txt':
+    #     raise Exception
+except IOError as e:
+    print('First!')
+except Exception as e:
+    print('Second')
+else:
+    print(f.read())
+    f.close()
+finally:
+    print("Executing Finally...")
+
+print('End of program')

Exceptions/test_file.txt

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+Test File Contents!