Question

在Python 3中，我有一个编码如下的程序。它基本上接受来自用户的输入并根据元组列表（EXCHANGE_DATA）进行检查并输出信息列表。问题是，数据在输出时按字母顺序排序，这不是我想要的方式。我该如何解决？

from shares import EXCHANGE_DATA
portfolio_str=input("Please list portfolio: ")
portfolio_str= portfolio_str.replace(' ','')
portfolio_str= portfolio_str.upper()
portfolio_list= portfolio_str.split(',')
print()
print('{:<6} {:<20} {:>8}'.format('Code', 'Name', 'Price'))
for code, share_name, share_value in EXCHANGE_DATA:
  if code in portfolio_list:
        print('{:<6} {:<20} {:>8.2f}'.format(code, share_name, share_value))

示例输入： GPG,HNZ,DIL,FRE

输出应如下：

Please list portfolio: GPG,HNZ,DIL,FRE

Code  Name                   Price
GPG   Guinnesspeat            2.32
HNZ   Heartland Nz            3.85
DIL   Diligent                5.30
FRE   Freightway              6.71

但我明白了：

Please list portfolio: GPG,HNZ,DIL,FRE

Code   Name                    Price
DIL    Diligent                 5.30
FRE    Freightway               6.71
GPG    Guinnesspeat             2.32
HNZ    Heartland Nz             3.85

更新代码

from shares import EXCHANGE_DATA
portfolio_str=input("Please list portfolio: ")
portfolio_str= portfolio_str.replace(' ','')
portfolio_str= portfolio_str.upper()
portfolio_list= portfolio_str.split(',')
print()
print('{:<6} {:<20} {:>8}'.format('Code', 'Name', 'Price'))
EXCHANGE_DATA = {code:(share_name,share_value) for code, share_name, share_value in EXCHANGE_DATA}
for code in portfolio_list:
     share_name, share_value = EXCHANGE_DATA[code]
     print('{:<6} {:<20} {:>8.2f}'.format(code, share_name, share_value))

Answer 1

一种方法是将EXCHANGE_DATA转换为字典，使用code作为关键字。然后你就可以改变你的循环了：

for code in portfolio_list:
    share_name, share_value = EXCHANGE_DATA[code]
    print('{:<6} {:<20} {:>8.2f}'.format(code, share_name, share_value))

元组按不需要的字母顺序排列

1 个答案: