这是第一次使用python编写程序,我试图只允许用户输入8位数。我设法做到这一点,每次我输入多于或少于8时,它会给出错误消息,但是如果我输入8位数,它仍然会给出错误消息
value3 = input("please enter your card number: ")
while not value3.isdigit():
value3= input("please enter your card NUMBER: ")
if len(value3) > 8:
while True:
value3 = input("Error! Only 8 characters allowed!: ")
if len(value3) < 8:
while True:
value3 = input("Error! Only 8 characters allowed!: ")
答案 0 :(得分:2)
您不应在value3 = input("please enter your card number: ")
while True:
if not value3.isdigit():
value3= input("please enter your card NUMBER, Only digits are allowed: ")
continue
elif len(value3) != 8:
value3 = input("Error! Only 8 digits allowed!: ")
else:
print("Valid card number")
break
语句中使用wildfly:
build:
dockerfile: Dockerfile.wildfly
context: .
volumes_from:
- logvolume
depends_on:
- logvolume
- mariadb-wildfly
mariadb-wildfly:
extends:
file: common-services.yml
service: mariadb-common
# ports:
# - "3307:3307"
# ------------------------------------------------------------------------
firefly:
build:
dockerfile: Dockerfile.wildfly
context: .
volumes_from:
- logvolume
depends_on:
- logvolume
- mariadb-firefly
mariadb-firefly:
extends:
file: common-services.yml
service: mariadb-common
。
您可以这样做:
wildfly-moskito:
extends:
file: common-services.yml
service: wildfly-common
答案 1 :(得分:1)
看来你在while循环中有“错误消息”,条件总是设置为true。所以无论你输入什么,你的程序仍然停留在while循环中。 更好的方法可能是定义一个“错误函数”,当输入大于/小于8时,它会被调用。