python之路-基础篇2

import getpass  #引用getpass这个模块
_username = "kk"
_password = "123456"
username = input("username:")
password = getpass.getpass("password") #getpass功能是让密码不直接显示成明文
if _username == username and _password == password:
    print("Welcome user {name} login...".format(name = username))
#print("Welcome user %s login..." % username)
else:
    print("error")

#猜年龄
age_of_oldboy = 65
guess_age = int(input("guess age："))
if guess_age == age_of_oldboy:
  print("Yes, you got it.")
elif guess_age > age_of_oldboy:
  print("No, think bigger!")
else:
  print("No,think smaller!")

#死循环
count = 0
while  True:
    print ("count",count)
  count = count + 1

age_of_oldboy = 65 
count = 0 #设置计数
while count < 3:#如果小于3次时循环执行
    #if count == 3:
    #break
    guess_age = int(input("guess age:"))
  if guess_age == age_of_oldboy:
    print("Yes, you got it.")
    break
  elif guess_age > age_of_oldboy:
    print("No, think bigger!")
  else:
    print("No,think smaller!")
  count += 1
else:
    print("Funk off")

age_of_oldboy = 65

count = 0
while count < 3:
#	if count == 3:
#		break
	guess_age = int(input("guess age:"))
	if guess_age == age_of_oldboy:
		print("Yes, you got it.")
		break
	elif guess_age > age_of_oldboy:
		print("No, think bigger!")
	else:
		print("No,think smaller!")
	count += 1
	if count == 3:#猜了三次还没有猜到询问用户是否要继续猜
		coutine_confim = input("do you want to keep guessing?:")
		if coutine_confim != "n":
			count = 0
#else:#这个就用不到了
#	print("Funk off")

#for循环
for i in range(10):
    print("loop ", i)

答案：
C:\Users\Documents\python>python learn01.py
loop  0
loop  1
loop  2
loop  3
loop  4
loop  5
loop  6
loop  7
loop  8
loop  9

age_of_oldboy = 65
for i in range(3):
    guess_age = int(input("guess age:"))
    if guess_age == age_of_oldboy:
        print("Yes, you got it.")
        break
    elif guess_age > age_of_oldboy:
        print("No, think bigger!")
    else:
        print("No,think smaller!")
else:
    print("Funk off")

for i in range(0,10,2):
    print("loop ",i)

#大循环i执行1次，小循环执行10次
for i in range(10):
	print('-----------',i)
	for j in range(10):
		print (j)
		if j > 5:#小循环大于5就停止
			break