无法解决def pick_num(text):
while True:
try:
a = float(input(text))
return a
except ValueError:
print('This is not a number')
def tile_cost():
w = pick_num('What is the width: ')
l = pick_num('What is the height: ')
c = pick_num('What is the cost: ')
print("The cost of tiling the floor will be: £%.2f" % (w * l * c))
;我想知道用户是新用户还是现有用户。
Firebase版本11.0.4
答案 0 :(得分:0)
additionalUserinfo.isNewuser()在firebase版本11.6.0中引入,您使用的是版本11.0.4。所以您实际上无法使用它
所以只需将其更新为11.6.0;)