Kehao addch9ex

2_intermediate/chapter9/practice/participation_grade.py

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+# Warning: can be challenging
+#
+# A teacher is given a list of students.The number of occurences of a student's
+# name in the list is the number of times the student participated this week.
+# If a student has 8 or more participations, they get an A. If a student has
+# between 4 and 7 participations, they get a B. If a student has more than
+# 0 but less than 4, the student gets a C.
+#
+# Make a dictionary with the keys as the students' name and the values as the
+# corresponding student's letter grade. Print the dictionary
+#
+# Write your code below
+
+
+participation_occurences = [
+    "Sam",
+    "Dan",
+    "Bob",
+    "Dan",
+    "Sam",
+    "Sam",
+    "Bob",
+    "Dan",
+    "Dan",
+    "Ivan",
+    "Ivan",
+    "Ray",
+    "Sam",
+    "Sam",
+    "Dan",
+    "Ivan",
+    "Ivan",
+    "Ray",
+    "Dan",
+    "Ivan",
+    "Ivan",
+    "Sam",
+    "Dan",
+    "Ray",
+    "Sam",
+    "Dan",
+    "Bob",
+    "Dan",
+    "Sam",
+    "Sam",
+    "Dan",
+    "Bob",
+    "Dan",
+    "Sam",
+    "Sam",
+]

2_intermediate/chapter9/solutions/participation_grade.py

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+# Warning: can be challenging
+#
+# A teacher is given a list of students.The number of occurences of a student's
+# name in the list is the number of times the student participated this week.
+# If a student has 8 or more participations, they get an A. If a student has
+# between 4 and 7 participations, they get a B. If a student has more than
+# 0 but less than 4, the student gets a C.
+#
+# Make a dictionary with the keys as the students' name and the values as the
+# corresponding student's letter grade. Print the dictionary
+#
+# Write your code below
+
+
+participation_occurences = [
+    "Sam",
+    "Dan",
+    "Bob",
+    "Dan",
+    "Sam",
+    "Sam",
+    "Bob",
+    "Dan",
+    "Dan",
+    "Ivan",
+    "Ivan",
+    "Ray",
+    "Sam",
+    "Sam",
+    "Dan",
+    "Ivan",
+    "Ivan",
+    "Ray",
+    "Dan",
+    "Ivan",
+    "Ivan",
+    "Sam",
+    "Dan",
+    "Ray",
+    "Sam",
+    "Dan",
+    "Bob",
+    "Dan",
+    "Sam",
+    "Sam",
+    "Dan",
+    "Bob",
+    "Dan",
+    "Sam",
+    "Sam",
+]
+
+grade_dict = {}
+for student in participation_occurences:
+    if student not in grade_dict:
+        grade_dict[student] = 1
+    else:
+        grade_dict[student] += 1
+
+for student in grade_dict.keys():
+    if grade_dict[student] > 7:
+        grade_dict[student] = "A"
+    elif grade_dict[student] > 3:
+        grade_dict[student] = "B"
+    else:
+        grade_dict[student] = "C"
+
+print(grade_dict)