Python如何制作制表符

Question

因此，我在下面构建了这个代码，它基本上计算了3种不同本金的复利：最小本金、增量本金（这是用户输入的值+最小本金的相加），最后是最大本金。在

principal=int(input("Enter an initial principle value: "))
assert principal >0, "Principal must be a positive integer value"
max_prin=int(input("Enter a maximum principle value: "))
assert max_prin >0 and max_prin>principal, "Principal must be a positive integer value"
increment=int(input("Enter the increment to increase it by: "))
prin_incre=increment+principal
interest=float(input("Enter an interest rate: "))
assert interest >0 and interest <1, "Interest must be greater than 0 but less than 1"
years=int(input("Enter how many years do you want it to go up by: "))
assert years>0, "Years must be a positive integer value"
min_year=int(input("Enter how many years it will take on a minimum basis: "))
assert min_year>0
max_year=int(input("Enter how many years it will take at maximum: "))
assert max_year > min_year and max_year >0

代码基本上获取用户输入和所有断言，以确保输入的值是正确的。在

现在底部的代码基本上是一个函数，它计算三种不同原则在一段时间内的三种不同的复利（最小年到最高年，用户输入年的增量）。在

^{pr2}$

现在我面临的问题是把下面的输出放入一个有组织的图表中：

^{3}$

正如你所看到的，理想情况下，我试图创造一些东西，例如：

compound interest table
year       original principlal  increment principal  maximum principal
5            454545               8448484              944949
6            555555               etc                  etc
7            994949
8           etc
9           etc
10          etc

因此，考虑到我上面的代码，如果有人对我当前的输出有什么建议或意见，并将其放入我在上面直接说明的理想图表形式的输出，请让我知道这是令人难以置信的！谢谢你

编辑：只是希望能够将输出的结果塑造成图表，而不是可导出的图表。在

Answer 1

如果您有列表中的数据，您可以使用这个简单的模块https://code.google.com/p/prettytable/

Answer 2

我已经修改了你的代码，使它达到预期的结果。请记住以下几点变化：

• 我写了raw_input而不是{}，因为如果您使用的是python3及以上版本，那么我使用的是python2.7。在
• 然后我修改了初始的for循环，将得到的每个值保存到它自己的列表中。在
• 然后在表格后面的表格里打印出来。Edt：固定间距 -最后，我运行了您的代码最初没有的函数。在

如果您对本规范有任何疑问、要求或顾虑，请留言：

principal=int(raw_input("Enter an initial principle value "))
assert principal, "Principal must be a positive integer value"
max_prin=int(raw_input("Enter a maximum principle value "))
assert max_prin, "Principal must be a positive integer value"
increment=int(raw_input("Enter the increment to increase it by" ))
prin_incre=increment+principal
interest=float(raw_input("Enter an interest rate "))
assert interest and interest, "Interest must be greater than 0 but less than 1"
years=int(raw_input("Enter how many years do you want it to go up by "))
assert years, "Years must be a positive integer value"
min_year=int(raw_input("Enter how many years it will take on a minimum basis "))
assert min_year
max_year=int(raw_input("Enter how many years it will take at maximum "))
assert max_year

def compound(principal, interest, years,min_year,max_year,max_prin,prin_incre,increment):
    years_list = []
    total_min_list = []
    total_max_list = []
    total_incre_list = []
    print("Compound Interest Table")
    for period in range(min_year,max_year,years):
        total_min = float(principal) * float((1+interest)**float(period+1))
        total_min_list.append(total_min)
        years_list.append(period+1)
        total_max=float(max_prin) * float((1+interest)**float(period+1))
        total_max_list.append(total_max)
        total_incre=float(prin_incre) * float((1+interest)**float(period+1))
        total_incre_list.append(total_incre)

    print('Year        Total Minimum        Total Maximum        Total Increment')
    for i in range(0,int(len(total_min_list))-1):
        spacing_min = 21 - len(str(total_min_list[i]))
        spacing_max = 21 - len(str(total_max_list[i]))
        spacing_years = 12 - len(str(years_list[i]))
        print(str(years_list[i])+ ' '*spacing_years +str(total_min_list[i])+ ' '*spacing_min +str(total_max_list[i])+ ' '*spacing_max +str(total_incre_list[i]))

 compound(principal,interest,years,min_year,max_year,max_prin,prin_incre,increment)