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Commit 188a59e

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‎Tutorials/range_while.py‎

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for x in range(10):
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print('from 0 to 9:')
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print(x)
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print('\n')
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for x in range(5, 12):
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print('from 5 to 11:')
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print (x)
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print('\n')
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# 3 numbers are used to put the range and the last number signifies the amount of plus need to be added to each number
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for x in range(10, 40, 5):
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print('from 10 to 40 in plus 5 terms:')
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print(x)

‎Tutorials/return_value.py‎

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def allowed(age):
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girls_age = age/2 + 7
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return girls_age
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allowed(30) # does not print anything
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limit = allowed(30)
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print('I can date girls with age ', limit, 'or older')

‎Tutorials/sample_prog.py‎

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x = []
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for _ in range(30):
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x.append(int(input()))
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for i in range(30):
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print(str(x[i]), " + ", end = " ")
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if i is 29:
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print(" = ", end = " ")
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print(sum(x))

‎Tutorials/sets.py‎

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'''
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its something like lists but notated with curly braces and no reps
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'''
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asd = {'hey', 'hi', 'wadup', 'hey'}
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print(asd)
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# it will only print 'hey' once
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'''
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num1 = 0
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numtemp = 0
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numfinal = 0
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while True:
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num1 = input("Enter an integer: ") # input is always taken as a string
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if num1.isdigit():
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numfinal = numtemp + int(num1)
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numtemp = numfinal
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else:
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print(numfinal)
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break
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'''

‎Tutorials/sorting_custom_objects.py‎

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from operator import attrgetter # attribute getter
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class User:
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def __init__(self, x, y):
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self.name = x
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self.user_id = y
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def __repr__(self): # This is an in built function used to convert an object into a string variable
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return self.name + " : " + str(self.user_id)
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users = [
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User('Bucky', 43),
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User('Sally', 5),
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User('Tuna', 61),
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User('Brain', 2),
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User('Joby', 77),
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User('Amanda', 9)
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] # above is a ist of class 'User' objects
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for user in users:
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print(user)
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print('________________________________')
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# Sorting:
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print("By User ID:\n")
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for user in sorted(users, key = attrgetter('user_id')): # attrgetter is used when there is no key given, but only an object is passed like 'user_id'
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print(user)
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print('________________________________')
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print("By name:\n")
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for user in sorted(users, key = attrgetter('name')): # attrgetter is used when there is no key given, but only an object is passed like 'name'
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print(user)

‎Tutorials/sorting_dics.py‎

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stocks = { "GOOG": 520.54,
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"YHOO": 54.23,
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"APPL": 300.33,
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"REDT": 450.02,
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"AMZN": 500.65
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}
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# We cannot sort dictionaries together, but we can sort two lists
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# When python sorts lists, it sorts it through the first element of the list
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# While zipping, it either sorts through the name or the price, depending on the one that we put first
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# Sorting through values
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print('Min:', min(zip(stocks.values(), stocks.keys()))) # to get the minimum value in the list
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print('Max:', max(zip(stocks.values(), stocks.keys())))
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# it gave us the minimum price, because the 1st list consisted of values and not keys
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print('\n', 'Sorting by values:')
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print(sorted(zip(stocks.values(), stocks.keys()))) # sorting by values
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print('\n', 'Sorting by keys:')
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print(sorted(zip(stocks.keys(), stocks.values()))) # sorting by keys

‎Tutorials/struct_.py‎

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from struct import *
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# Store as bytes data
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# Struct is something that converts something that humans can read to 1's and 0's, and vice versa
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# Converting into byte format:
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packed_data = pack('iif', 6, 19 , 4.73) # It takes in the format of each number followed by the numbers/values
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# 'iif' means 2 int and 1 float value. If we enter 5 int we need to enter 'iiiii'
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print(packed_data) # It prints it out in byte format
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print(calcsize('i'))
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print(calcsize('f'))
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print(calcsize('iif')) # It prints the amount of memory needed to store the given data
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# Converting bytes to readable format:
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unpacked_data = unpack('iif', packed_data)
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print(unpacked_data)
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print(unpack('iif', b'\x06\x00\x00\x00\x13\x00\x00\x00)\\\x97@')) # It gives the same result

‎Tutorials/threading_tut.py‎

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# Threading - Basically running two programs at the same time
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import threading
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class MyMessenger(threading.Thread):
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def run(self):
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for _ in range(1000):
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print(threading.currentThread().getName()) # Remember the syntax
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# 2 threads to send and receive msgs
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x = MyMessenger(name = 'send out msgs') # naming a thread
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y = MyMessenger(name = 'receive msgs')
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x.start() # its a rule. The start() goes to run(). You cant run the run() directly
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y.start()
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#its cool. It starts executing object 'y' even before finishing object 'x'. Basically runs them parallely, and finishes it faster

‎Tutorials/unpack_args.py‎

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def health(age, apples, cigs):
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life = (100 - age) + (apples * 3.5) - (cigs * 1.5)
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print(life)
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my_data = [18, 2, 0]
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health(my_data[0], my_data[1], my_data[2])
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'''
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the above method is very tedious so the lower method is used which
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effectively reduces coding and puts the values in the given list accordingly
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'''
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health(*my_data)

‎Tutorials/while.py‎

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x=5
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while x < 10:
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print(x)
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x += 1
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