Solved all chapter 8 problems

Author: LambdaDrive

Chapter 8/Problem8_20.py

@@ -0,0 +1,15 @@
+class BankAccount:
+
+    def __init__(self,money=0):
+        self.money = money
+
+    def withdraw(self, amount):
+        self.money -= amount
+
+    def deposit(self, amount):
+        self.money += amount
+
+    def balance(self):
+        return self.money
+
+    

Chapter 8/Problem8_21.py

@@ -0,0 +1,14 @@
+import math
+class Polygon:
+
+    def __init__(self, sides, lenght):
+        self.n = sides
+        self.s = lenght
+
+    def perimeter(self):
+        return self.n * self.s
+
+    def area(self):
+        return (((self.s**2) * self.n)/(4 * (math.tan(math.pi/self.n))))
+    
+        

Chapter 8/Problem8_22.py

@@ -0,0 +1,29 @@
+class Worker:
+
+    def __init__ (self, stringname, hourlypay):
+        self.name = stringname
+        self.wage = hourlypay
+
+    def changeRate(self, newrate):
+        self.wage = newrate
+
+    def pay(self, hours):
+        print('Not Implemented')
+
+class HourlyWorker(Worker):
+
+     def pay(self, hours):
+         money = 0
+         for i in range(1, hours + 1):
+             if i <= 40:
+                 money += self.wage
+             else:
+                 money += (self.wage) * 2
+         return money
+
+class SalariedWorker(Worker):
+
+    def pay(self, hours=0):
+        return self.wage * 40
+    
+    

Chapter 8/Problem8_23.py

@@ -0,0 +1,20 @@
+import math
+class Point:
+
+    def __init__(self,x=0, y=0):
+        self.cordx = x
+        self.cordy = y
+
+class Segment:
+
+    def __init__(self, point1, point2):
+        self.ponto1 = point1
+        self.ponto2 = point2
+
+    def length(self):
+        seg = math.sqrt(((self.ponto2.cordx - self.ponto1.cordx)**2)+((self.ponto2.cordy - self.ponto1.cordy)**2))
+        return seg
+    
+    def slope(self):
+        slop = ((self.ponto2.cordx - self.ponto1.cordx)/(self.ponto2.cordy - self.ponto1.cordy))
+        return slop

Chapter 8/Problem8_24.py

@@ -0,0 +1,14 @@
+import time
+class Person:
+
+    def __init__(self, name, byear):
+        self.nome = name
+        self.birthyear = byear
+
+    def age(self):
+        idade = (int(time.strftime('%Y', time.localtime()))) - self.birthyear
+        return idade
+
+    def name(self):
+        return self.nome
+    

Chapter 8/Problem8_25.py

@@ -0,0 +1,56 @@
+class Textfile:
+
+    def __init__(self, filename):
+
+        file = open(filename)
+        content = file.read()
+        file.close
+        self.file = content
+
+    def nchars(self):
+
+        charnum = 0
+        content = self.file
+        charnum = len(content)
+        return charnum
+
+    def nwords(self):
+
+        numwords = 0
+        content= self.file
+        content = content.split()
+        numwords = len(content)
+        return numwords
+
+    def nlines(self):
+
+        numlines = 0
+        content = self.file
+        content = content.split('\n')
+        numlines = len(content)
+        return numlines
+
+    def read(self):
+
+        return self.file
+
+    def readlines(self, n):
+
+        content = self.file
+        content = content.split('\n')
+        return content
+
+    def grep(self, string):
+
+        result = ''
+        lines = []
+        content = self.file
+        content = content.split('\n')
+        for i in range(len(content)):
+            if string in content[i]:
+                lines.append(i)
+        for line in lines:
+            result += '{}: '.format(line)
+            result +='{} \n'.format(content[line])
+        print(result)
+    

Chapter 8/Problem8_26.py

@@ -0,0 +1,63 @@
+class Textfile:
+
+    def __init__(self, filename):
+
+        file = open(filename)
+        content = file.read()
+        file.close
+        self.file = content
+
+    def nchars(self):
+
+        charnum = 0
+        content = self.file
+        charnum = len(content)
+        return charnum
+
+    def nwords(self):
+
+        numwords = 0
+        content= self.file
+        content = content.split()
+        numwords = len(content)
+        return numwords
+
+    def nlines(self):
+
+        numlines = 0
+        content = self.file
+        content = content.split('\n')
+        numlines = len(content)
+        return numlines
+
+    def read(self):
+
+        return self.file
+
+    def readlines(self, n):
+
+        content = self.file
+        content = content.split('\n')
+        return content
+
+    def grep(self, string):
+
+        result = ''
+        lines = []
+        content = self.file
+        content = content.split('\n')
+        for i in range(len(content)):
+            if string in content[i]:
+                lines.append(i)
+        for line in lines:
+            result += '{}: '.format(line)
+            result +='{} \n'.format(content[line])
+        print(result)
+
+    def words(self):
+
+        content = self.file
+        content = content.split()
+        content = list(set(content))
+        return content
+    

Chapter 8/Problem8_27.py

@@ -0,0 +1,77 @@
+class Textfile:
+
+    def __init__(self, filename):
+
+        file = open(filename)
+        content = file.read()
+        file.close
+        self.file = content
+
+    def nchars(self):
+
+        charnum = 0
+        content = self.file
+        charnum = len(content)
+        return charnum
+
+    def nwords(self):
+
+        numwords = 0
+        content= self.file
+        content = content.split()
+        numwords = len(content)
+        return numwords
+
+    def nlines(self):
+
+        numlines = 0
+        content = self.file
+        content = content.split('\n')
+        numlines = len(content)
+        return numlines
+
+    def read(self):
+
+        return self.file
+
+    def readlines(self, n):
+
+        content = self.file
+        content = content.split('\n')
+        return content
+
+    def grep(self, string):
+
+        result = ''
+        lines = []
+        content = self.file
+        content = content.split('\n')
+        for i in range(len(content)):
+            if string in content[i]:
+                lines.append(i)
+        for line in lines:
+            result += '{}: '.format(line)
+            result +='{} \n'.format(content[line])
+        print(result)
+
+    def words(self):
+
+        content = self.file
+        content = content.split()
+        content = list(set(content))
+        return content
+    
+    def occurrences(self):
+
+        ocur = {}
+        content = self.file
+        content = content.split()
+        content = set(content)
+        for word in content:
+            ocur[word] = 0
+        content = self.file.split()
+        for word in content:
+            ocur[word] += 1
+        return ocur
+
+    

Chapter 8/Problem8_28.py

@@ -0,0 +1,102 @@
+class Textfile:
+
+    def __init__(self, filename):
+
+        file = open(filename)
+        content = file.read()
+        file.close
+        self.file = content
+
+    def nchars(self):
+
+        charnum = 0
+        content = self.file
+        charnum = len(content)
+        return charnum
+
+    def nwords(self):
+
+        numwords = 0
+        content= self.file
+        content = content.split()
+        numwords = len(content)
+        return numwords
+
+    def nlines(self):
+
+        numlines = 0
+        content = self.file
+        content = content.split('\n')
+        numlines = len(content)
+        return numlines
+
+    def read(self):
+
+        return self.file
+
+    def readlines(self, n):
+
+        content = self.file
+        content = content.split('\n')
+        return content
+
+    def grep(self, string):
+
+        result = ''
+        lines = []
+        content = self.file
+        content = content.split('\n')
+        for i in range(len(content)):
+            if string in content[i]:
+                lines.append(i)
+        for line in lines:
+            result += '{}: '.format(line)
+            result +='{} \n'.format(content[line])
+        print(result)
+
+    def words(self):
+
+        content = self.file
+        content = content.split()
+        content = list(set(content))
+        return content
+    
+    def occurrences(self):
+
+        ocur = {}
+        content = self.file
+        content = content.split()
+        content = set(content)
+        for word in content:
+            ocur[word] = 0
+        content = self.file.split()
+        for word in content:
+            ocur[word] += 1
+        return ocur
+
+    def average(self):
+        content = self.file
+        for symbol in '.?!':
+            content = content.replace(symbol, '%')
+        content = content.replace('\n', '')
+        content = content.split('%')
+        avg = 0
+        wordssentence = []
+        morewords = 0
+        fewerwords = 100
+        for i in range(len(content)-1):
+            wordssentence.append(content[i].split())
+        for listwords in wordssentence:
+            for word in listwords:
+                avg += 1
+        avg = avg / len(content)
+        for i in range(len(wordssentence)):
+            if len(wordssentence[i]) > morewords:
+                morewords = len(wordssentence[i])
+        for i in range(len(wordssentence)-1):
+            if len(wordssentence[i])<fewerwords:
+                fewerwords = len(wordssentence[i])
+        tupla = (avg, morewords, fewerwords)
+        return tupla
+        
+