函数返回格式

Question

简单的ATM模拟练习-需要返回一些信息，包括字符串和整数，但是返回的是整行代码，而不仅仅是字符串和整数的组合

现金点代码

from SimpleCashPoint_v2 import cashpoint


print('\nTEST-EXAMPLE 1')

result = cashpoint('1234',3415.55)
print('\n---------\nRESULT:', result)
print('-' * 40, '\n')

cahspoint函数代码（在文件SimpleCashPoint_v2）

elif trans_type == '2' : 
    withdraw = float(input('Amount to withdraw: '))
    result = ('\nYou have withdrawn ', withdraw, ' your remaining balance is ', (balance-withdraw),'£')

    return result

#我期望输出：

In[36]result

Out[36] You have withdrawn 10 your remaining balance is 50 £

我得到一个

In[36]result

Out[36]: ('\nYou have withdrawn ', 10, ' your remaining balance is ', 50, '£')

Answer 1

您可以替换：

result = ('\nYou have withdrawn ', withdraw, ' your remaining balance is ', (balance-withdraw),'£')

使用：

result = "\nYou have withdrawn {} your remaining balance is {} £".format(withdraw, balance-withdraw)

搜索字符串格式，例如https://realpython.com/python-string-formatting/

Answer 2

当你做结果的时候，你正在做一个元组

type(result)
<class 'tuple'>

所以我认为如果你把你的元素组合成一个字符串，它就可以工作了

一种非常天真的方法是：

withdraw = ...
result = "/nYou have withdrawn" + str(withdraw) + "your remaining balnce is" + str(balance-withdraw) + "$"
return result