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Updated questions to show multiple ways of doing - also added the refactor option to B4
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‎session_08/answers/A2.py

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# A2 - Read the file 'austen.txt' and print the amount of lines in the file
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#Option 1
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total = 0
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for x in open("austen.txt"):
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total += 1
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print(total)
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#Option 2
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f = open("austen.txt", "r")
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count = 0
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for x in f:
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count += 1
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print(count)

‎session_08/answers/A3.py

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# A3 - Each line of the file 'numbers.txt' contains a number, write a script to add up all the values in the file
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#Option 1
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total = 0
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for x in open("numbers.txt"):
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total += int(x)
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print(total)
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#Option 2
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f = open("numbers.txt", "r")
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sum = 0
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for x in f:
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x = int(x)
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sum += x
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print(sum)

‎session_08/answers/B1.py

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# B1 - Ask the user to enter their name and append this to a file called 'register.txt'
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file1 = open("register.txt", "a")
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name = True
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while name != "":
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name = input("whats uyour anme? ")
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name = input("What's your name?\n")
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if name:
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file1.write(name + "\n")
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‎session_08/answers/B2.py

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# B2 - Create a new file called 'even.txt' that contains only the even numbers from the file 'numbers.txt"
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f = open("even.txt", "w")
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for x in open("numbers.txt"):
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x = int(x)
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if x % 2 == 0:
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f.write(str(x) + "\n")
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f.close()

‎session_08/answers/B4.py

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# Fake data is usually evenly distributed, where as real data The files 'accounts_1.txt', 'accounts_2.txt' and 'accounts_3.txt' contain financial transaction data.
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# Work out which of the files contains fake data.
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# STAGE 1 - this code allows us to check the values of one of the account files.
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f = open("accounts_1.txt", "r")
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count = {
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"0":0,
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"1":0,
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"2":0,
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"3":0,
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"4":0,
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"5":0,
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"6":0,
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"7":0,
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"8":0,
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"9":0
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}
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for x in f:
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if x:
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count[x[0]] += 1
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for y in range(1,10):
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print(str(y) + " = " + str(count[str(y)]/100) + "%")
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# STAGE 2 - Adding a for loop so we are able to loop through all accounts.
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for x in range(1,4):
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f = open("accounts_" + str(x) + ".txt", "r")
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count = {
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"0":0,
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"1":0,
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"2":0,
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"3":0,
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"4":0,
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"5":0,
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"6":0,
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"7":0,
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"8":0,
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"9":0
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}
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for num in f:
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if num:
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count[num[0]] += 1
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print(x)
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for y in range(1,10):
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print(str(y) + " = " + str(count[str(y)]/100) + "%")
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#STAGE 3 - Changing count so instead of us manually having to input count, it will create itself
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for x in range(1,4):
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f = open("accounts_" + str(x) + ".txt", "r")
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count = {
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"0": 0,
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"1": 0,
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"2": 0,
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"3": 0,
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"4": 0,
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"5": 0,
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"6": 0,
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"7": 0,
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"8": 0,
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"9": 0,
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}
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for num in f:
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if num:
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count[num[0]] += 1
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print(x)
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for y in range(1,10):
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print(str(y) + " = " + str(count[str(y)]/100) + "%")
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f = open("accounts_" + str(x) + ".txt", "r")
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count = {}
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for i in range(1,10):
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count[str(i)] = 0
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for num in f:
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if num:
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count[num[0]] += 1
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print(x)
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for y in range(1,10):
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print(str(y) + " = " + str(count[str(y)]/100) + "%")
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# STAGE 4 - Putting our code into a function - call 3 times
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def benford_calc(file_name):
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f = open(file_name, "r")
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count = {}
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for i in range(1,10):
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count[str(i)] = 0
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for num in f:
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if num:
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count[num[0]] += 1
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print("Results for:" + file_name)
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for y in range(1,10):
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print(str(y) + " = " + str(count[str(y)]/100) + "%")
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benford_calc("accounts_1.txt")
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benford_calc("accounts_2.txt")
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benford_calc("accounts_3.txt")
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# STAGE 5 - Looping through file names, so we don't need to call the function 3 times, as per stage 4
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def benford_calc(file_name):
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f = open(file_name, "r")
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count = {}
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for i in range(1,10):
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count[str(i)] = 0
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for num in f:
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if num:
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count[num[0]] += 1
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print("Results for:" + file_name)
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for y in range(1,10):
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print(str(y) + " = " + str(count[str(y)]/100) + "%")
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for x in range (1,4):
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file_name = "accounts_" + str(x) + ".txt"
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benford_calc(file_name)
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# STAGE 6 - Separating file function from data function
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def benford_calc_file(file_name):
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f = open(file_name, "r")
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return benford_calc(f)
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def benford_calc(data):
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count = {}
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for x in range(1,10):
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count[str(x)] = 0
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for num in data:
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if num:
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count[str(num[0])] += 1
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return count
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for x in range (1,4):
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file_name = "accounts_" + str(x) + ".txt"
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data = benford_calc_file(file_name)
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print("Results for:" + file_name)
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for y in range(1,10):
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print(str(y) + " = " + str(data[str(y)]/100) + "%")
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# STAGE 7 - Sending in a list of random numbers
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def benford_calc_file(file_name):
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f = open(file_name, "r")
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return benford_calc(f)
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def benford_calc(data):
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count = {}
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for x in range(1,10):
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count[str(x)] = 0
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for num in data:
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if num:
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count[str(num[0])] += 1
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return count
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for x in range (1,4):
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file_name = "accounts_" + str(x) + ".txt"
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data = benford_calc_file(file_name)
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print("Results for:" + file_name)
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for y in range(1,10):
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print(str(y) + " = " + str(data[str(y)]/100) + "%")
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random_nums = [str(random.randint(1,100)) for x in range(1,10001)]
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data = benford_calc(random_nums)
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print("Results for Random Nums")
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for y in range(1,10):
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print(str(y) + " = " + str(data[str(y)]/100) + "%")

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