我是Python编程的新手,使用Python 3.x,并且正在使用Barbershop P.O.S系统,管理员将有权添加服务及其相应的价格.
我正在使用Pretty Table库来实现打印带有serviceID,服务和价格的表格.
这是我的代码：
from prettytable import PrettyTable
import random
serviceID = []
services = []
price = []
x = PrettyTable()
x.add_column("ServiceID",[serviceID])
x.add_column("Service",[services])
x.add_column("Price",[price])
while True:
try:
ID = random.randint(1,90000) #range high to lower probability of non-uniqueness
serviceID.append(ID) #Generates unique ID for each service
prompt1 = input("Please add a service name to the listn")
services.append(prompt1)
prompt2 = input("Please enter a price for the servicen")
prompt2 == int(prompt2)
price.append(prompt2)
print(x)
except ValueError:
print("Please enter valid type")
continue
当我输入第一个服务和Price时,输出为：
+-----------+---------+--------+
| ServiceID | Service | Price |
+-----------+---------+--------+
| [9880] | ['box'] | ['90'] |
+-----------+---------+--------+
当我输入第二个服务和价格时,输出是这样的：
+---------------+-----------------+--------------+
| ServiceID | Service | Price |
+---------------+-----------------+--------------+
| [9880,47612] | ['box','trim'] | ['90','80'] |
+---------------+-----------------+--------------+
我想输出是这样的：
+---------------+-----------------+--------------+
| ServiceID | Service | Price |
+---------------+-----------------+--------------+
| 9880 | box | 90 |
| 47612 | trim | 80 |
+---------------+-----------------+--------------+
有谁知道如何实现这一目标？
任何帮助,将不胜感激.
我们可以通过add_row方法将行添加到PrettyTable对象中.
演示：
>>> from prettytable import PrettyTable
>>> import random
>>>
>>> x = PrettyTable(["ServiceID","Service","Price"])
>>>
>>> while True:
... #- Get value
... ID = random.randint(1,90000) #range high to lower probability of non-uniqueness
... prompt1 = raw_input("Please add a service name to the listn")
... try:
... #- Type Casting.
... prompt2 = int(raw_input("Please enter a price for the servicen"))
... except ValueError:
... print("Please enter valid type")
... continue
... #- Add row
... x.add_row([ID,prompt1,prompt2])
... #- Ask user to Continue or not.
... choice = raw_input("Continue yes/ no:").lower()
... if not(choice=="yes" or choice=="y"):
... break
...
Please add a service name to the list
2
Please enter a price for the service
3
Continue yes/ no:y
Please add a service name to the list
4
Please enter a price for the service
6
Continue yes/ no:y
Please add a service name to the list
5
Please enter a price for the service
7
Continue yes/ no:n
>>> print x
+-----------+---------+-------+
| ServiceID | Service | Price |
+-----------+---------+-------+
| 38515 | 2 | 3 |
| 8680 | 4 | 6 |
| 51188 | 5 | 7 |
+-----------+---------+-------+
>>>
删除行：
使用del_row()方法.我们需要传递要删除的行的索引.
>>> print x
+-----------+---------+-------+
| ServiceID | Service | Price |
+-----------+---------+-------+
| 38515 | 2 | 3 |
| 8680 | 4 | 6 |
| 51188 | 5 | 7 |
+-----------+---------+-------+
>>> x.del_row(1)
>>> print x
+-----------+---------+-------+
| ServiceID | Service | Price |
+-----------+---------+-------+
| 38515 | 2 | 3 |
| 51188 | 5 | 7 |
+-----------+---------+-------+
如果我们提供的索引值大于异常中的总行数,则需要处理异常,需要在ur代码中处理.
例外情况是：
>>> x.del_row(10)
Traceback (most recent call last):
File "
注意：
>对Python 2.x使用raw_input()
>对Python 3.x使用input()
