Added Week4 lecture materials

Author: tiagomestreteixeira

week4/lecture8/getRatios.py

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+# -*- coding: utf-8 -*-
+"""
+Created on Wed Jun  8 21:08:39 2016
+
+@author: ericgrimson
+"""
+
+def get_ratios(L1, L2):
+    """ Assumes: L1 and L2 are lists of equal length of numbers
+        Returns: a list containing L1[i]/L2[i] """
+    ratios = []
+    for index in range(len(L1)):
+        try:
+            ratios.append(L1[index]/float(L2[index]))
+        except ZeroDivisionError:
+            ratios.append(float('NaN')) #NaN = Not a Number
+        except:
+            raise ValueError('get_ratios called with bad arg')
+    return ratios

week4/lecture8/getStats.py

@@ -0,0 +1,35 @@
+# -*- coding: utf-8 -*-
+"""
+Created on Wed Jun  8 21:10:35 2016
+
+@author: ericgrimson
+"""
+
+
+def get_stats(class_list):
+    new_stats = []
+    for elt in class_list:
+        new_stats.append([elt[0], elt[1], avg(elt[1])])
+    return new_stats 
+
+#def avg(grades):
+#    return sum(grades)/len(grades)
+
+test_grades = [[['peter', 'parker'], [10.0, 5.0, 85.0]], 
+           [['bruce', 'wayne'], [10.0, 8.0, 74.0]],
+           [['captain', 'america'], [8.0,10.0,96.0]],
+           [['deadpool'], []]]
+
+#def avg(grades):
+#    try:
+#        return sum(grades)/len(grades)
+#    except ZeroDivisionError:
+#        print('no grades data')
+
+
+def avg(grades):
+    try:
+        return sum(grades)/len(grades)
+    except ZeroDivisionError:
+        print('no grades data')
+        return 0.0

week4/lecture8/lec8_except.pdf

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+# -*- coding: utf-8 -*-
+"""
+Created on Thu Jun  9 13:36:46 2016
+
+@author: WELG
+"""
+
+data = []
+
+file_name = input("Provide a name of a file of data ")
+
+try:
+    fh = open(file_name, 'r')
+except IOError:
+    print('cannot open', file_name)
+else:
+    for new in fh:
+        if new != '\n':
+            addIt = new[:-1].split(',') #remove trailing \n
+            data.append(addIt)
+finally:
+    fh.close() # close file even if fail
+
+

week4/lecture8/readingData.py

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+# -*- coding: utf-8 -*-
+"""
+Created on Thu Jun  9 13:36:46 2016
+
+@author: WELG
+"""
+
+data = []
+
+file_name = input("Provide a name of a file of data ")
+
+try:
+    fh = open(file_name, 'r')
+except IOError:
+    print('cannot open', file_name)
+else:
+    for new in fh:
+        if new != '\n':
+            addIt = new[:-1].split(',') #remove trailing \n
+            data.append(addIt)
+finally:
+    fh.close() # close file even if fail
+
+gradesData = []
+if data:
+    for student in data:
+        try:
+            gradesData.append([student[0:2], [student[2]]])
+        except IndexError:
+            gradesData.append([student[0:2], []])

week4/lecture8/readingDataRev1.py

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+# -*- coding: utf-8 -*-
+"""
+Created on Thu Jun  9 13:36:46 2016
+
+@author: WELG
+"""
+
+data = []
+
+file_name = input("Provide a name of a file of data ")
+
+try:
+    fh = open(file_name, 'r')
+except IOError:
+    print('cannot open', file_name)
+else:
+    for new in fh:
+        if new != '\n':
+            addIt = new[:-1].split(',') #remove trailing \n
+            data.append(addIt)
+finally:
+    fh.close() # close file even if fail
+
+gradesData = []
+if data:
+    for student in data:
+        try:
+            name = student[0:-1]
+            grades = int(student[-1])
+            gradesData.append([name, [grades]])
+        except ValueError:
+            gradesData.append([student[:], []])
+

week4/lecture8/readingDataRev2.py

@@ -0,0 +1,10 @@
+
+
+Eric, Grimson, 80
+John, Guttag, 100
+Ana, Bell, 90
+Drew, Houston, 70
+Mark, Zuckerberg, 75
+Bill, Gates
+Deadpool, 25
+Baron, von, Richthofen, 65