• data types, literals
  • basic data types: Boolean (and, or, not) Numbers (+,-,*,/,//,%,str) Strings (slice, split, strip, int)
• variables
• print
• assignment statement
• collection Data Structure: list, set, dictionary
• conditional statement, for-loop statement, while-loop statement
• accumulator pattern
• functions
• command line parameters
• read from file

xs = [10,20,30,40,50]

ss = ["Alice","John","Raj"]

xs[0]

10

xs[2:4]

[30, 40]

xs.append(60)

xs

[10, 20, 30, 40, 50, 60]

n = int(input("enter a number: "))
if n%2 == 0:
    print("EVEN")
else:
    print("ODD")

EVEN

n = int(input("enter a number: "))
if n%2 == 0:
    print("EVEN")
print("DONE")

EVEN
DONE

n = int(input("enter a score: "))
if n >= 90:
    print("A")
elif n >= 80:
    print("B")
elif n >= 70:
    print("C")
elif n >= 60:
    print("D")
else:
    print("F")

xs

[10, 20, 30, 40, 50, 60]

answer = 0
for x in xs:
    if x%2 != 0:
        answer = answer + x

print(answer)

0

def odd_sum(xs):
    answer = 0
    for x in xs:
        if x%2 != 0:
            answer = answer + x
    return answer

odd_sum([10,21,30,43,50])

64

odd_sum([10,20,30])

0

# Reads file and returns a list of lines in string format
def read_data(fname):
    with open(fname,"r") as f:
        data = f.read().splitlines()
    f.close()
    return data

read_data("in.dat")

['# read from file data about one day ', '# format: start_time:end_time:#steps', '09.30AM:09.45AM:220', '11.45AM:12.23PM:300', '11.45AM:10.23AM:302', '2.45PM:3.23PM:202', '3.45PM:3.53PM:90', '5.45PM:5.53PM:80', '6.45PM:7.23PM:1000', '10.45PM:10.53PM:102']

"09:35am".find(":")

2