Data transformation in python.

problem.py

# Online Python compiler (interpreter) to run Python online.
# Write Python 3 code in this online editor and run it.
students = [
    {"name": "user1", "marks": 10, "gender": "male"},
{"name": "user2", "marks": 12, "gender": "male"},
{"name": "user3", "marks": 15, "gender": "male"},
{"name": "user4", "marks": 20, "gender": "female"},
{"name": "user5", "marks": 25, "gender": "female"}]

print("1: print all student names")
for student in students:
    print(student["name"])
    
print("2: Print average marks of female students (using lambda)")
sum = 0;
count = 0;
for student in filter(lambda x : x["gender"] == "female", students):
    sum+= student["marks"]
    count += 1
print("Sum of all female student marks: "+ str(sum));
print("Average "+ str(sum/count));

print("2: Print average marks of female students (without using lambda)")
sum = 0;
count = 0;
filteredStudents = [];
for student in students:
    if student["gender"] == "female":
        filteredStudents.append(student);
print (filteredStudents);
        
//https://gist.github.com/rajivnarayana/a5eebae8c6b4d666a0dbd4eacba72b82