Question

我想创建一个程序，允许用户继续输入三个项目的集合，每个输入提示一个，然后将三个值输出到文本文件中的一行。

这是一些基本的例子

text_file = open("filename", "w")

While True:
      Code = input("Enter code")
      Description = input("Enter description")
      Price = input("Enter price")

任何人都可以帮助我吗？

编辑：所以这就是我到目前为止的地方。

text_file = open("file.txt", "w")

while True:
      user_input = input("Enter a code, description and price")
      split = user_input.split(" ")
      split = str(split)
      text_file.write(split)

唯一的问题是它不允许我输出列表。

Answer 1

sep = ','   # separator character
textfile.write(sep.join([Code, Description, Price]) + '\n')

Answer 2

with open("filename.txt", "w") as f:
    while True: 
         f.write(input("Enter code : ")+' ')
         f.write(input("Enter description : ")+' ')
         f.write(input("Enter price : ")+'\n')

Answer 3

如果使用Python＆gt; = 3.6并且不需要与旧版本兼容：

data Month1;
input Name $ sales;
cards;
Joyce 235
Marsha 352
Bill 491
Vernon 210
Sally 418
;
data Month2;
input Name $ sales;
cards;
Joyce 169
Marsha 281
Bill 315
Vernon 397
Sally 305
;
data Month3;
input Name $ sales;
cards;
Joyce 471
Marsha 314
Bill 394
Vernon 291
Sally 337
;
data Month4;
input Name $ sales;
cards;
Joyce 338
Marsha 259
Bill 310
Vernon 432
Sally 362
;
data Month5;
input Name $ sales;
cards;
Joyce 209
Marsha 355
Bill 302
Vernon 416
Sally 475
;
data Month6;
input Name $ sales;
cards;
Joyce 306
Marsha 472
Bill 351
Vernon 405
Sally 358
;

options sgen;
%let qtr=qtr1;
%Macro ProcSql;
    Proc Sql;
    %if &qtr=qtr1 %then %do;
        %let month1=month1;
        %let month2=month2;
        %let month3=month3;
    %end;
    %else %if &qtr=qtr2 %then %do;
        %let month1=month4;
        %let month2=month5;
        %let month3=month6;
    %end;
    %else %if &qtr=qtr3 %then %do;
        %let month1=month7;
        %let month2=month8;
        %let month3=month9;
    %end;
    %else %%if &qtr=qtr4 %then %do;
        %let month1=month10;
        %let month2=month11;
        %let month3=month12;
    %end;
    create table &qtr as
    select &month1.name, &month1.sales as m1sales, &month2.sales as m2sales,
            &month3.sales as m3sales, sum(m1sales, m2sales, m3sales) as 
qtrsales
        from &month1, &month2, &month3
        where &month1.name=&month2.name=&month3.name;
    select sum(m1sales) as m1total, sum(m2sales) as m2total, sum(m3sales) as 
m3total,
            sum(qtrsales) as qtrtotal
        from &qtr;
%mend ProcSql;
    %ProcSql;

否则（改编自另一个答案）：

text_file.write(f'{Code} {Description} {Price}\n')

请注意，变量名称应以小写字母开头，这是事实上的标准约定。因此，您应该使用text_file.write('{} {} {}\n'.format(Code, Description, Price))，code和description作为变量名称。

Answer 4

假设用户使用空格分割三个字段（即1232示例产品$ 24.95），您知道第一个空格将代码与描述分开，最后一个空格将描述与价格分开。然后：

text_file = open("filename", "w")

while True:
      user_input = input("Enter Code Description Price:")
      split_input = user_input.split(' ')
      code = split_input[0]
      description = ' '.join(split_input[1:-1])
      price = split_input[-1]

text_file.write('{} {} {}\n'.format(code, description, price))

如何在文件中的一行中输出3个项目？

4 个答案: