Python

1.d＝{'a':1，'b':2，'b':'3'}

2.print(d['b'])

1.name ＝ "Python语言程序设计课程"

2.print(name[0],name[2:-2],name[-1])

1.turtle circle(-90,90)

for s in "PYTHON":

if s＝＝"H":

continue

print(s,end＝"")

    def main():

        a = 5

        b = 6

        print(a,a+b)

    main()

i = 0

while i < 4:

   print(i)

   i += 2

def fib(n):

    a,b = 1,1

    for i in range(n-1):

        a,b = b,a+b

    return a

print (fib(3))

def hello_world():

    print('ST',end="!")

def three_hellos():

    for i in range(3):

        hello_world()

three_hellos()

for i in "Python":

    print(i,end=" ")