我在下面写了while
语句来验证姓氏字段并输出一个布尔值以查看是否发生了任何错误。该程序将所有错误消息存储在变量errors
中。我在每次错误检查后都添加了break
语句,因为我不希望程序在检测到错误后继续检查错误。
我不确定此代码是否有效 - 在这种情况下是否需要while
语句?
您怎么看?
valcheck = True
# validate surname
while valcheck == True :
try :
surname = str(e2.get())
except :
errors += "\nSurname not valid - must be a string."
valcheck = False
break
# check if surname is not empty
if len(surname) <= 0 :
errors += "\nSurname cannot be blank."
valcheck = False
# check if surname is alphabetical
for i in str(surname) :
# also, allow for hyphens and apostrophes
if not(i.isalpha() or i == "'" or i == '-') :
errors += "\nSurname not valid - must be alphabetical."
valcheck = False
# if there are no errors, exit the statement
break
提前致谢。
答案 0 :(得分:0)
这似乎更好吗?
else if(keyPressed == Qt::Key_Space){
emit sigHalted();
}