Question

我正在尝试验证我的python脚本：

def DOBSearch():
    loop = True
    while loop == True:
        try:
            DOBsrch = int(input("Please enter the birth month in a two digit format e.g. 02: "))
            for row in BkRdr:
                DOB = row[6]
                day,month,year = DOB.split("/")
                if DOBsrch == int(month): 
                    print("W")
                    surname = row[0]
                    firstname = row[1]
                    print(firstname, " ",surname)
                    addrsBk.close
                    loop = False
                else:
                    print("1 That was an invalid choice please try again.")
        except ValueError:
            print("That was an invalid choice please try again.")

然而，当我尝试测试脚本时，我发现存在错误/错误，因为我得到以下输出：

>>> DOBSearch()
Please enter the birth month in a two digit format e.g. 02: 2345
1 That was an invalid choice please try again.
1 That was an invalid choice please try again.
1 That was an invalid choice please try again.
1 That was an invalid choice please try again.
1 That was an invalid choice please try again.
1 That was an invalid choice please try again.
Please enter the birth month in a two digit format e.g. 02: 23456
Please enter the birth month in a two digit format e.g. 02: 4321
Please enter the birth month in a two digit format e.g. 02: 2345
Please enter the birth month in a two digit format e.g. 02: yrsdhctg
That was an invalid choice please try again.
Please enter the birth month in a two digit format e.g. 02: 02
Please enter the birth month in a two digit format e.g. 02:

这是CSV文件：

Jackson,Samantha,2 Heather Row,Basingstoke,RG21 3SD,01256 135434,23/04/1973,sam.jackson@hotmail.com
Vickers,Jonathan,18 Saville Gardens,Reading,RG3 5FH,01196 678254,04/02/1965,the_man@btinternet.com
Morris,Sally,The Old Lodge, Hook,RG23 5RD,01256 728443,19/02/1975,smorris@fgh.co.uk
Cobbly,Harry,345 The High Street,Guildford,GU2 4KJ,01458 288763,30/03/1960,harry.cobbly@somewhere.org.uk
Khan,Jasmine,36 Hever Avenue,Edenbridge,TN34 4FG,01569 276524,28/02/1980,jas.khan@hotmail.com
Vickers,Harriet,45 Sage Gardens,Brighton,BN3 2FG,01675 662554,04/04/1968,harriet.vickers@btinternet.com

Answer 1

你不能区分什么是有效出生月份（即有意义的出生月份，1到12之间的整数）和BkRdr中的出生月份（可能是其中的一部分））。您在try数据块中有太多内容，并且会告知用户row中BkRdr的每个row他们的输入无效，而后期def input_month(): """Get a valid birth month from the user.""" while True: try: month = int(input("Please enter the birth month in a two digit format e.g. 02: ")) except ValueError: print("Must be a number") else: if month in range(1, 13): return month print("Must be in range 1-12") def DOB_search(BkRdr): """Find a valid birth month in BkRdr.""" while True: search_month = input_month() for row in BkRdr: ... if search_month == int(month): ... return " ".join((firstname, surname)) print("Not found in BkRdr.")可能实际匹配。< / p>

我会将它分成至少两个函数，使用显式参数而不是依赖于范围：

BkRdr

这将您的代码的两个问题分开：

从用户那里获得有效的出生月份输入;和
尝试在BkRdr。

我还会重新考虑变量名称 - 无论如何都是{{1}}？

Answer 2

我认为您的代码中存在两个错误。

首先，您要重复打印第一条错误消息。这是因为print行位于for循环内部，用于检查CSV文件中的每一行。每个不匹配的行都会生成错误消息。

要解决此问题，您应该将print语句上移一个级别，以便在for循环结束后调用。

第二个问题是你循环的BkRdr似乎是一个迭代器，而不是你可以重复迭代的序列。这就是为什么第一个之后的每个数字输入都会无声地失败。在这些情况下，for循环根本不做任何事情！

要解决第二个问题，您可能需要更改未显示的其他代码，以便将CSV文件读入列表，而不是仅读取迭代器。（或者，您可以回放文件，或关闭并重新打开它。）

验证循环错误

2 个答案: