ex33_pyfml.py

# Exercise 3.3
# Pyfml course
# Name : Quach Chi Cuong
# Glot.io : https://glot.io/snippets/eiljlbotls
# Requirement : viet chuong trinh loai bo phan mo rong cua 1 ten file bat ky
# input = '....slsslslsls...sls' 
# output = '....slsslslsls..'
# input = 'maria.ozawa.mp9' 
# output = 'maria.ozawa'


# Khoi tao chuoi input dau vao
input = 'maria.ozawa.mp9'

# Bien kiem tra dieu kien dau '.' phat hien lan dau tien.
count=0

# Chay vong lap for range tu -1 den length cua input -1.
for index in range(-1, -len(input)-1, -1):
	# Phat hien ra dau '.' khi chay tu sau duoi chuoi vao, -> ten file co phan mo rong.
	if input[index] == '.':
		if count == 0:
			position=index
			count = 1
			print('Input = \'',input,'\'\nOutput = \'',input[:position],'\'')
			break

if count == 0:
	print('- Input \'',input,'\' khong co phan mo rong.')